Method and control device for operating a laboratory mill

Abstract

The invention relates to a method for operating a laboratory mill, comprising the steps of: determining (V1) a vibration behaviour of the laboratory mill during a grinding operation, testing (V3) whether the determined vibration behaviour has a critical vibration state for the grinding operation, defining (V4) a technical intervention in the operation of the laboratory mill based on a test result resulting from the testing step, outputting (V5) a signal via a user interface to a user of the laboratory mill, the signal having technical information which communicates to the user that the defined technical intervention in the operation of the laboratory mill is required.

Description

[0001] Method and control device for operating a laboratory mill

[0002] Technical area

[0003] The present invention relates to a method for operating a laboratory mill. The present invention also relates to a control device for carrying out such a method and to a laboratory mill having such a control device.

[0004] State of the art

[0005] Electrically driven laboratory mills are known from the prior art and are used to grind material in a laboratory. In such prior art laboratory mills, a grinding tool is connected to an electric drive via a shaft to drive the grinding tool in rotation. For this purpose, it is known to detect vibrations of the laboratory mill caused by the operation of the grinding tool during grinding operation.

[0006] Description of the invention

[0007] In one aspect, the present invention relates to a method for operating a laboratory mill. The laboratory mill can be configured to comminute a material to be ground. The laboratory mill can be operated with various grinding tools for comminuting the material to be ground. The laboratory mill can be operated with various grinding containers for holding the material to be ground. The material to be ground can be, for example, organic material or inorganic material.

[0008] The method comprises, as one step, determining the oscillation behavior of the laboratory mill during grinding operation. The oscillation behavior can be a vibration behavior. In the step of determining the oscillation behavior, an oscillation of the laboratory mill during grinding operation can be determined. The oscillation can be a vibration. During grinding operation, the laboratory mill can be operated with a grinding tool that can be operated in a grinding container to comminute the material to be ground.

[0009] The method comprises a further step of checking whether the determined vibration behavior represents a critical vibration state for the grinding operation. The critical vibration state may be a critical vibration state. The determined vibration behavior may be the determined vibration. The critical vibration state may be a critical vibration, for example a natural vibration, of the laboratory mill for the grinding operation. The critical vibration state may be a critical upper vibration limit of the laboratory mill for the grinding operation. The critical vibration may be a critical vibration. The critical vibration state for the grinding operation may be a vibration state in which the technical operation of the laboratory mill may be endangered.In such a technically endangered operation, the grinding tool and / or the grinding container may exhibit or become technically damaged, which could jeopardize the operation of the laboratory mill. In such a technically endangered operation, the grinding tool and / or the grinding container may become technically damaged if the operation of the laboratory mill is maintained.

[0010] The method comprises, as a further step, determining a technical intervention in the operation of the laboratory mill based on a test result resulting from the testing step. If a test result from the testing step is that the determined vibration behavior exhibits a critical vibration state for the grinding operation, it can be determined in the determining step that the technical intervention in the operation of the laboratory mill is necessary. If a test result resulting from the testing step is that the determined vibration behavior does not exhibit a critical vibration state for the grinding operation, it can be determined in the determining step that the technical intervention in the operation of the laboratory mill is not necessary.

[0011] The method comprises, as a further step, outputting a signal to a user of the laboratory mill via a user interface. The signal may comprise technical information that communicates to the user that the specified technical intervention in the operation of the laboratory mill is required. Alternatively, the signal may comprise technical information that communicates to the user that the technical intervention in the operation of the laboratory mill is not required.

[0012] The method can be used to determine technical maintenance of the laboratory mill, technical repair of the laboratory mill, or replacement of a mill component of the laboratory mill based on the vibration behavior of the laboratory mill and to automatically communicate this to a user. The method can thus perform a technical self-diagnosis in order to automatically determine and communicate a technical intervention required for maintenance of the laboratory mill, repair of the laboratory mill, or component replacement. The laboratory mill can thus be operated particularly efficiently, avoiding downtimes of the laboratory mill and damage to the laboratory mill. The invention can thus improve the operating quality of a laboratory mill.

[0013] According to one embodiment of the method, the step of determining the vibration behavior can be carried out when a grinding tool, in particular in a grinding container, is operated in a rotating manner during the grinding operation. In the step of determining the vibration behavior, vibrations of the laboratory mill generated by the rotating grinding tool can be determined. The vibrations can be vibrations of the laboratory mill. In the step of testing, it can be checked whether the determined vibrations are or exceed critical vibrations, which can be predetermined for operation of the grinding tool. The critical vibrations can be critical vibrations. In the step of determining the technical intervention, the technical intervention can be determined if the test result resulting from the step of testing is that the determined vibrations are or exceed the critical vibrations.The grinding operation with a rotating grinding tool can thus be monitored in a particularly reliable manner.

[0014] According to a further embodiment of the method, this can comprise, as a further step, detecting a vibration of the laboratory mill using a vibration sensor arranged on a mill body. The vibration can be a vibration, and the vibration sensor can be a vibration sensor. The vibration sensor can be arranged in a base region or standing region of the mill body. The step of determining the vibration behavior can be carried out based on the detected vibration. The vibration sensor can be an acceleration sensor or a gyro sensor, or can comprise a vibration sensor or gyro sensor. The vibration sensor can be a one-, two-, or three-dimensional vibration sensor that can detect vibrations of the laboratory mill in a corresponding number of dimensions.The vibration sensor can be an effective component of a mill monitoring system for self-diagnosis of a critical vibration condition.

[0015] According to a further embodiment of the method, this can comprise, as a further step, reading in a limit value for the vibration behavior of the laboratory mill during grinding operation. As an alternative to the reading-in step, the method can comprise, as a further step, determining the limit value for the vibration behavior of the laboratory mill during grinding operation. The limit value can be an oscillation limit value, which can be a vibration limit value. The limit value can define the critical vibration state. In the checking step, a check can be made to determine whether the determined vibration behavior exceeds the read-in limit value, and a test result can be determined that the vibration behavior has the critical vibration state for grinding operation if the vibration behavior exceeds the read-in limit value.During the testing step, it can be determined whether the specific vibration exceeds the vibration limit. As a test result, it can be determined that the vibration behavior exhibits the critical vibration state for milling operation if the specific vibration exceeds the vibration limit. The step of determining the technical intervention can be carried out based on the test result. Mill monitoring can thus be carried out particularly efficiently using this method.

[0016] According to a further embodiment of the method, the limit value for the vibration behavior of the laboratory mill during grinding operation can be read in during the reading step, which limit value is provided by an information carrier comprising a grinding tool and / or a grinding container. During the reading step, a tool-specific limit value for the vibration behavior of the laboratory mill during grinding operation and / or a container-specific limit value for the vibration behavior of the laboratory mill during grinding operation can be read in. The tool-specific and / or container-specific limit value can contain information about the critical vibration state for the grinding operation in which the grinding tool and / or the grinding container are used. Thus, the critical vibration state for the grinding operation can be determined automatically depending on the grinding tool and / or grinding container with which the laboratory mill can be equipped.

[0017] According to a further embodiment of the method, in the step of determining the vibration behavior, at least one vibration parameter of the laboratory mill can be determined, which has information on at least one of a vibration amplitude of the laboratory mill and a vibration period of the laboratory mill. In the testing step, it can be determined whether the determined vibration behavior has or exceeds a critical vibration amplitude and / or a critical vibration period for the grinding operation. In the testing step, it can be checked whether the vibration amplitude of the laboratory mill is a critical vibration amplitude of the laboratory mill or exceeds it. Alternatively or additionally, the testing step can check whether the vibration period of the laboratory mill is a critical vibration period of the laboratory mill or exceeds it.In the step of determining the technical intervention, the technical intervention can be determined if the at least one vibration parameter is the critical vibration parameter of the laboratory mill or exceeds it. In the step of determining the technical intervention, the technical intervention can be determined if the vibration amplitude is the critical vibration amplitude or exceeds it. Alternatively or additionally, in the step of determining the technical intervention, the technical intervention can be determined if the vibration period is the critical vibration period or exceeds it.

[0018] According to a further embodiment of the method, in the step of determining the technical intervention, it can be determined that maintenance, repair, or replacement of a grinding tool and / or a grinding container must be performed in order to continue grinding operation. Based on this, in a further step of the method, maintenance, repair, and / or replacement of the grinding tool and / or the grinding container can be performed. The maintenance, repair, and / or replacement of the grinding tool can be performed manually by the user. Operational reliability and quality assurance for the operation of the laboratory mill can thus be improved.

[0019] According to a further embodiment of the method, in the step of determining the technical intervention, it can be determined that the grinding tool must be balanced to continue the grinding operation. In the step of outputting the signal, the signal can contain information that communicates to the user that balancing of the grinding tool is necessary. Critical vibrations generated by the rotary operation of the grinding tool can be avoided after balancing the grinding tool.

[0020] According to one embodiment of the method, in the step of determining the technical intervention, it can be determined that a bearing of the grinding tool must be serviced or replaced in order to continue the grinding operation. In the step of outputting the signal, the signal can contain information that communicates to the user that maintenance or replacement of the bearing of the grinding tool is required. The bearing of the grinding tool can comprise a ball bearing with which the grinding tool is radially mounted on an axis arranged in the grinding container. After maintenance or replacement of the bearing, critical vibrations of the laboratory mill, which are generated by rotational operation of the grinding tool when the latter is inadequately supported, can be avoided.

[0021] According to a further embodiment of the method, in the step of outputting the signal, the signal can comprise visual information which visually communicates to the user that the specified technical intervention in the operation of the laboratory mill is required. The visual information can be communicated to the user via the user interface. The visual information can be semantic information, for example a technical maintenance or repair symbol, which is visually communicated to the user. The specified technical intervention can thus be intuitively conveyed to the user with its technical content. According to a further embodiment of the method, in the step of outputting the signal, the signal can be output via an operating group for setting a grinding parameter for the grinding operation, wherein the operating group has the user interface.The user interface can be a touchscreen, through which the specified technical intervention can be visually communicated to the user. Mill monitoring can thus be integrated into an operating group.

[0022] According to a further embodiment of the method, this can comprise, as a further step, outputting a control signal to a drive control device of an electric drive, which can be configured to transmit a torque to a grinding tool. The control signal can comprise a control command based on the defined technical intervention. The control command can be a control command for shutting down or stopping the grinding operation or the grinding tool, which is operated in rotation during the grinding operation. Alternatively, the control command can be a control command for changing, in particular reducing, a rotational speed of the grinding tool. In addition to outputting the signal, automated intervention in the grinding operation can thus be carried out in order to effectively prevent damage to the laboratory mill caused by the vibration behavior of the latter.According to a further embodiment, the step of outputting the control signal to the drive control device can be carried out with the method as an alternative to the step of outputting the signal via the user interface to the user of the laboratory mill.

[0023] In a further aspect, the present invention relates to a control device for outputting a signal to a user of the laboratory mill via a user interface. The control device can be configured to carry out the method according to the preceding aspect.

[0024] In yet another aspect, the present invention relates to a laboratory mill for comminuting a material to be ground. The laboratory mill has a user interface for communicating with a user and a control device according to the preceding aspect for outputting a signal via the user interface to a user of the laboratory mill. Brief description of the figures

[0025] Figure 1 shows a laboratory mill in perspective view according to one embodiment.

[0026] Figure 2 shows the laboratory mill in a sectional view through a mill body and a grinding container of the laboratory mill according to respective embodiments.

[0027] Figure 3 shows a contactless magnetic coupling of the laboratory mill between an electric drive and a grinding tool of the laboratory mill in a sectional view according to respective embodiments.

[0028] Figure 4 shows the contactless magnetic coupling of the laboratory mill according to an embodiment in an isolated and perspective view.

[0029] Figure 5 shows an adjusting mechanism for engaging and disengaging the contactless magnetic coupling of the laboratory mill according to one embodiment.

[0030] Figure 6 shows the grinding container of the laboratory mill in a perspective view of a container bottom of the grinding container.

[0031] Figure 7 shows a grinding container carrier of the laboratory mill according to an embodiment.

[0032] Figure 8a shows the grinding container of the laboratory mill with a safety locking device according to one embodiment.

[0033] Figure 8b shows the grinding container of the laboratory mill with a safety interlock and a locking device according to respective further embodiments.

[0034] Figure 9 shows the laboratory mill with an operating group in a sectional view according to the respective embodiments.

[0035] Figure 10 shows a laboratory mill system with modularly interchangeable grinding tools according to one embodiment.

[0036] Figure 11 shows the laboratory mill in a schematic representation according to an embodiment.

[0037] Figure 12 shows a flowchart with method steps for operating the laboratory mill according to one embodiment. Figure 13 shows another flowchart with method steps for operating the laboratory mill according to another embodiment.

[0038] Detailed description of embodiments

[0039] Figure 1 shows a laboratory mill 100. The laboratory mill 100 can be designed as a tabletop device, wherein the laboratory mill 100 can be placed on a laboratory table (not shown in the figures). The laboratory mill 100 has a mill body 2, which can have a housing 3. The housing 3 can consist of at least one housing component 4. A control device 110, shown in Figure 2, for controlling the laboratory mill 100 is arranged in the mill body 2. A power supply 1, shown in Figure 9, for supplying energy to an electric drive 40, shown in Figure 3, for driving a grinding tool 20, shown in Figure 3, can also be arranged in the mill body 2.

[0040] The laboratory mill 100 can have an operating group 210 arranged on the mill body 2. The operating group 210 can have two user interfaces 211, 221, which can be operated by a user of the laboratory mill 100 to control a grinding operation of the laboratory mill 100 in which the grinding tool 20 is operated. The user interfaces 211, 221 can be connected to the control device 110 to communicate a grinding parameter, which can be set by the user via at least one of the user interfaces 211, 221, to the control device 110. The control device 110 can be configured to control the grinding operation based on the adjustable grinding parameter.

[0041] The laboratory mill 100 can have a touchscreen 212 arranged on the mill body 2, wherein the touchscreen 212 can have the first user interface 211. The first user interface 211 can be formed on a touch-sensitive area 214 of the touchscreen 212. The touch-sensitive area 214 can be configured to recognize a grinding parameter selected by the user by touching the touch-sensitive area 214, wherein the first user interface 211 is configured to communicate the grinding parameter to the control device 110. The laboratory mill 100 can have a second user interface 221, which can have a rotary knob 222. The rotary knob 222 can be configured to recognize a grinding parameter selected by the user by rotating the rotary knob 222. The rotary knob 222 can be configured as a rotary knob 222 that can be removed from the mill body 2.A positioning aid 216 can be arranged on the mill body 2 or on the housing 3, which specifies a desired position of the removable rotary actuator 222 on the mill body 2. The rotary actuator 222 can thus be manually attached to the desired position by the user using the positioning aid 216.

[0042] The laboratory mill 100 has a grinding container 10, which can be manually attached to the mill body 2 and manually removed therefrom. The grinding container 10 can be arranged on the mill body 2 with another grinding container (not shown) in a manually interchangeable manner. The grinding container 10 has a grinding bowl 18 and a container lid 16 for closing the grinding bowl 18. The container lid 16 can have an addition opening 5 for adding grinding material to the grinding container 10. The grinding container 10 can therefore be configured for continuous grinding operation with continuous addition of grinding material into the grinding container 10 during grinding operation. The grinding container 10 can have an outlet opening 6, from which ground material comminuted in the grinding container 10 can be dispensed. The comminuted ground material can be dispensed during continuous grinding operation.

[0043] According to one embodiment of the laboratory mill 100, the grinding container 10 can have a safety interlock 70. The safety interlock 70 is configured to prevent the user from opening the container lid 16 during grinding operation. The safety interlock 70 is also configured to prevent the container lid 16 from opening in the operating state of the grinding container 10 shown in Figure 1, in which it is attached to the mill body 2.

[0044] According to one embodiment of the laboratory mill 100, the laboratory mill 100 can have a pivot joint 7 for pivoting the grinding container 10 relative to the mill body 2. The grinding container 10 can be pivoted about a pivot axis 8 relative to the mill body 2, wherein the pivot axis 8 can be designed as a horizontal pivot axis 8 when the laboratory mill 100 is standing on the laboratory bench. The grinding container 10 can thus be pivoted on the mill body 2 for continuous grinding operation. The laboratory mill 100 can be operated in discontinuous operation with the grinding container 10 in the non-pivoted state shown in Figure 1. In continuous operation, the grinding container can be pivoted approximately 90 degrees about the pivot axis 8 from the state shown in Figure 1.

[0045] Figure 2 shows the laboratory mill 100 in a section through the mill body 2 and the grinding container 10. The mill body 2 can have a grinding container support 9, on which the grinding container 10 is arranged. The grinding container support 9 can be arranged on the pivot joint 7 and can be pivoted about the pivot axis 8 relative to the mill body 2. The grinding container support 9 can thus be pivotally connected to the mill body 2 via the pivot joint 7.

[0046] The laboratory mill 100 has an electric drive 40, which can be arranged on the grinding container support 9. The electric drive 40 can be connected to a drive control device 41, which is configured to control the electric drive 40. The drive control device 41, which can be arranged in the grinding container support 9, is electrically connected to the control device 110, which is arranged in the mill body 2. The electric drive 40 can be arranged in the grinding container support 9 or on it. According to one embodiment, the electric drive 40 and the grinding container 10, which can both be arranged on the grinding container support 9, can be pivotable relative to the mill body 2. The electric drive 40 and the grinding container 10 can thus be pivoted together by means of the rotary joint 7 about the pivot axis 8 relative to the mill body 2.The laboratory mill 100 can also have an orientation sensor 34, which is configured to detect a pivot angle of the grinding container support 9 relative to the mill body 2. The orientation sensor 34 can be designed as a rotary encoder and arranged on the rotary joint 7. The orientation sensor 34 can also be designed as an inclination sensor and arranged on the grinding container support 9. The laboratory mill 100 has a grinding tool 20, which is arranged in the grinding container 10. The grinding tool 20 can be manually arranged in the grinding container 10 and manually removed therefrom. The grinding tool 20 can be arranged in the grinding container 10 so that it can be manually exchanged with another grinding tool (not shown). The grinding tool 20 can be designed as a rotor tool, as in the embodiment of the laboratory mill 100 shown in the figures.The grinding tool 20 can be rotatably mounted on an axis 22 arranged in the grinding container 10. During grinding operation, in which the tool 20 is operated in rotation about the axis 22, the axis 22 can have a stationary position in the grinding container 10. The electric drive 40 can be coupled to the grinding tool 20 for driving the grinding tool 20 in rotation via a contactless magnetic coupling 42. The grinding tool 20 can have a grinding screen 19 through which the comminuted ground material is discharged. The grinding screen 19 can be cylindrical and arranged coaxially to the axis 22 so that the comminuted ground material can pass through it in the radial direction.

[0047] The laboratory mill 100 may include a vibration sensor 90, which may be arranged on the mill body 2. The vibration sensor 90 may be configured to detect vibrations of the laboratory mill 100 during grinding operation, which vibrations are generated by the rotational operation of the grinding tool 20. The vibration sensor 90 may be connected to the control device 110, wherein the control device 110 may be configured to control the grinding operation of the laboratory mill 100 based on the vibrations detected by the vibration sensor 90.

[0048] Figure 3 shows the grinding tool 20, the electric drive 40, and the magnetic coupling 42 in detail. Also shown is an adjusting mechanism 50, which is configured to engage and disengage a magnetic coupling of the contactless magnetic coupling 42.

[0049] The grinding container 10 has a container bottom 15 on which the grinding tool 20 can be arranged. The container bottom 15 can have a base plate 13, which according to one embodiment is made of zirconium dioxide. The base plate 13 can have a flat bottom surface 14 on which the grinding tool 20 can be arranged without mechanical guidance. The container bottom 15 can form a closed container bottom 15 through which no drive component for driving the grinding tool 20 is guided.

[0050] The grinding tool 20 can have the axis 22, on which comminution tools 25 are arranged. According to the embodiment of the grinding tool 20 shown in the figures, these tools are designed as rotors and can be radially mounted on the axis 22 via at least one ball bearing 26. The comminution tools 25 can be arranged for rotational movement on the axis 22. The grinding screen 19, which surrounds the comminution tools 25, can be fixedly arranged on the axis 22. The contactless magnetic coupling 42 has an output side 43, which can be connected in a rotationally fixed manner to the comminution tools 25 and, together with them, can be rotatably mounted on the axis 22 via the ball bearings 26.

[0051] The axle 22 can be held on the bottom surface 14 and the container lid 16. The axle 22 can be held radially and / or axially on the bottom surface 14 and the container lid 16. The axle 22 can be held non-rotatably on the bottom surface 14 and / or the container lid 16, wherein the axle 22, the container bottom 15, and / or the container lid 16 can have an anti-rotation device (not shown in the figures), which can be configured to establish the stationary position of the axle 22. The anti-rotation device can have a rotation lock, which can be configured to absorb a residual torque that can be transmitted via the ball bearing 26 through the magnetic coupling to the axle 22 during grinding operation with the grinding tool 20 rotating. The anti-rotation device or the rotation lock can thus block a relative rotation of the axle 22 to the grinding container 10. A movement of the axle 22 in the circumferential direction of the axle 22 can thus be prevented.The container lid 16 can, as shown in Figure 2, have an axle receptacle 27 for axially holding the axle 22 in the grinding container 10 and / or the anti-rotation device. The axle 22 can be axially and / or radially fixed between the bottom surface 14 of the axle receptacle 27. The position of the axle 22 in the grinding container 10 can thus be stationary in the grinding container 10 by the contactless magnetic coupling 42, the axle receptacle 27 and / or the anti-rotation device. The contactless magnetic coupling 42 has a drive side 45, which can be rotationally connected to a rotor 46 of an electric motor 47. The electric drive 40 has the electric motor 47, which, according to the embodiment shown in the figures, can be designed as an internal rotor motor. The electric motor 47 has a stator 48, which can surround the rotor 46 and can have windings of the electric motor 47.The drive side 45 of the contactless magnetic coupling 42, which can be driven in rotation by the electric motor 47, can be magnetically coupled to the output side 43 of the contactless magnetic coupling 42 in the engaged state of the contactless magnetic coupling 42 shown in Figure 3. When the contactless magnetic coupling 42 is magnetically coupled in the engaged state, magnetic forces act between permanent magnet pairs 44, which can comprise the output side 43 and the drive side 45. The comminution tools 25 can thus be driven in rotation in the grinding container 10 by the magnetic force without contact. The stationary position of the axis 22 can be fixed to the flat bottom surface 14 of the container bottom 15 by the contactless magnetic coupling 42 in the grinding container 10.

[0052] The grinding tool 20 can have a tool identifier carrier 21, which can have a tool identifier for identifying the grinding tool 20. The tool identifier carrier 21 can be designed as an RFID transponder 23, which can be arranged on a bottom region of the grinding tool 20, which can be arranged on the container bottom 15. The RFID transponder 23 can be read by an RFID reader 17 shown in Figures 5 and 7, which can be arranged on the mill body 2. The RFID reader 17 can be connected to the control device 110 in order to read the tool identifier and communicate it to the control device 110.

[0053] Figure 4 shows the output side 43 and the drive side 45 of the contactless magnetic coupling 42 in an isolated view. The drive side 45 and the output side 43 can each have a plurality of permanent magnets 44', which can form magnetically coupled permanent magnet pairs 44 when the contactless magnetic coupling 42 is in the engaged state. The magnetic force between the output side 43 and the drive side 45 can thus be formed from cumulative individual magnetic forces between the permanent magnet pairs 44. The output side 43 can be rotatably mounted on the axle 22 via the ball bearings 26 shown in Figure 3, which can thus have a stationary position in the grinding container 10. The comminution tools 25 shown in Figure 3 can be non-rotatably mounted on the output side 43. The drive side 45 can be connected in a rotationally fixed manner or mechanically operatively connected to the rotor 46 of the electric motor 47 shown schematically in Figure 4.A rotational movement of the rotor 46 can thus be transmitted to the comminution tools 25 via the magnetic force of the supplied contactless magnetic coupling 42, wherein the rotational movement is not transmitted to the axis 22 on which the comminution tools 25 are rotatably mounted.

[0054] Figures 3 and 5 show the adjusting mechanism 50 for engaging and disengaging the contactless magnetic coupling 42 shown in Figure 4. The adjusting mechanism 50 is configured to move the drive side 45 of the contactless magnetic coupling 42 relative to the output side 43 of the contactless magnetic coupling 42. The adjusting mechanism 50 can have a translational adjusting mechanism configured to move the drive side 45 translationally relative to the output side 43. The adjusting mechanism 50 can be configured to move the drive side 45 translationally parallel or coaxially to the axis 22.

[0055] The adjusting mechanism 50 can have a cylindrical adjusting body 52, on which the drive side 45 can be movably guided via the electric drive 40. The adjusting body 52 can be connected in a rotationally fixed manner to an actuating member 56. The actuating member 56 can have at least one actuating receptacle 57, into which the grinding container 10 can engage when the grinding container 10 is arranged on the actuating member 56. The grinding container 10 can have at least one engagement element 12, shown in Figure 6, which can engage in the actuating receptacle 57. Rotating the grinding container 10, which engages in the actuating receptacle 57 via the engagement element 12, can cause the adjusting body 52 to rotate. The rotation of the grinding container 10 can occur when the grinding container 10 is arranged and locked on the mill body 2. The adjusting mechanism 50 may comprise actuators 53 which can connect the electric drive 40 to the mill body 2.The actuators 53 can be arranged for translational movement in guide rails 54, which can be arranged on the mill body 2. The guide rails 54 can be fastened to the mill body 2 and can thus form stationary guide rails 54 in the mill body 2 for translational guidance of the actuators 53. The actuators 53 can also be guided in guide grooves 55, which can be formed in the actuator body 52. ​​The guide grooves 55 can extend helically in sections in the cylindrical actuator body 52. ​​The partially helical guide grooves 55 can have a constant and / or variable pitch.The translational guidance of the actuators 53 in the guide rails 54 and the helical guidance of the actuators 53 in the cylindrical actuator body 52 can cause an axial movement of the drive side 45 of the contactless magnetic coupling 42 relative to a cylinder axis of the cylindrical actuator body 52 upon rotation of the actuator body 52. ​​The resulting axial movement of the drive side 45 can be the translational movement of the drive side 45, which can occur parallel or coaxially to the axis 22.

[0056] Starting from the grinding container 10, the guide grooves 55 can have a clockwise thread. A clockwise rotation of the grinding container 10 after engagement of the grinding container 10 in the actuating receptacles 57 can cause the drive side 45, which is arranged in the adjusting body 52, to approach the output side 43. The clockwise rotation of the grinding container 10 can occur when the grinding container 10 is arranged and locked on a locking device 65, which is arranged on the mill body 2. The locking device 65 is configured to lock the grinding container 10 to the mill body 2. The grinding container 10 can thus be secured stationary on the mill body 2. The locking device 65 can have a bayonet lock 66.The clockwise rotation of the grinding container 10 can thus cause the contactless magnetic coupling 42 to be moved, whereby the electric drive 40 with the drive side 45 can be brought closer to the output side 43 and thus can be moved with it.

[0057] A counterclockwise rotation when the grinding container 10 engages in the actuating receptacles 57

[0058] Rotating the grinding container 10 can cause the drive side 45 to be moved away from the output side 43. Counterclockwise rotation of the grinding container 10 can occur when the grinding container 10 is released from the locking device 65. Counterclockwise rotation of the grinding container 10 can thus cause the contactless magnetic coupling 42 to be separated, whereby the electric drive 40 with the drive side 45 can be moved away from the output side 43 and thus separated from it.

[0059] Figure 6 shows the grinding container 10 in a perspective view of the container bottom 15. The grinding container 10 can have a container identifier carrier 11, which can have a container identifier for identifying the grinding container 10. The container identifier carrier 11 can be connected to a spring contact 60, which can be arranged on the container bottom 15.

[0060] Figure 7 shows the grinding container support 9 of the mill body 2 in a perspective view of the locking device 65 for locking the grinding container 10 to the grinding container support 9. Figures 6 and 7 show the spring contact 60, which can have spring contact pins 62 arranged on the grinding container side as shown in Figure 6 and circular contact rails 64 arranged on the mill body side. With the spring contact 60, a wireless

[0061] A data communication section 32 may be formed, which can be established by contacting the spring contact pins 62 with the contact rails 64. The contacting can be established automatically by manually arranging the grinding container 10 on the mill body 2 while locking the grinding container 10 on the locking device 65.

[0062] Via the wireless data communication section 32, operating data of the grinding container 10 and / or the grinding tool 20, which can be detected by the sensor 30 shown in Figure 3, can be communicated from the sensor 30 to the control device 110. The sensor 30 can be configured to detect operating data of the grinding container 10 and / or the grinding tool 20. The operating data can include an operating temperature of the grinding container 10 and / or the grinding tool 20. Alternatively or additionally, the operating data can include a

[0063] Detect the closed state of the grinding container 10 and / or a locked state of the grinding container 10. To detect the locked state, a contact can be set up on the grinding container support 9 in a locked position of the grinding container 10. The contact can have a spring contact pin 62' arranged on the grinding container side, which can be designed as an end contact 68 on the grinding container side, and a contact rail 64' arranged on the mill body side, which can be designed as an end contact 68 on the mill body side. The end contacts 68 can establish a contact in the locked position, which can communicate the locked state to the control device 110. The control device 110 can control and enable the grinding operation if the contact is present in the locked state.

[0064] Figure 8a shows the grinding container 10 with the safety locking device 70 according to one embodiment. The safety locking device 70 can be arranged on the grinding container 10. The grinding container 10 is shown in an operating state B of the grinding container 10, which is configured for grinding operation and in which the grinding container 10 is arranged on the mill body 2. In the operating state B configured for grinding operation, the safety locking device 70 is configured to prevent manual movement of the container lid 16 relative to the grinding pot 18. The safety locking device 70 is configured to prevent the container lid 16 from opening.

[0065] The safety locking device 70 can have a locking device 72, which can be arranged on the grinding bowl 18. The locking device 72 can have a movable locking element 74, which can be mounted on the grinding bowl 18. The movable locking element 74 can engage with an active element 78, which can be arranged on the container lid 16 and connected thereto in a rotationally fixed manner. The movable locking element 74 can be designed as a locking pin 75, which can engage with the active element 78. The locking device 72 can have an actuating element 76, which can cause the movable locking element 74 to engage with the active element 78 and thus secure the container lid 16 against rotation.The adjusting element 76 can be designed as a spring 77, which can be configured and arranged on the grinding bowl 18 in such a way that it exerts an adjusting force on the movable locking element 74, which can bring about engagement with the active element 78. The spring 77 can pretension the movable locking element 74 in the direction of the container lid 16. The active element 78 can have a conical region 79, which can bear against the movable locking element 74 when the container lid 16 is rotated relative to the grinding bowl 18. The conical region 79 can cause the movable locking element 74 to initially be moved opposite to the adjusting force of the adjusting element 76 when the container lid 16 is rotated relative to the grinding bowl 18, until the movable locking element 74 engages in a receptacle 80 of the active element 78 for receiving the movable locking element 74.

[0066] The locking device 72 can have an actuating element 82, which can be arranged on the container lid 16. The actuating element 82 can be designed as an actuating pin 83, which can be arranged coaxially with the locking pin 75. The locking device 72 can also have a return element 84, which can be designed as a return spring 85. The return element 84 can be configured and arranged on the container lid 16 to move the actuating element 82 in the direction of the actuating force of the actuating element 76. When the actuating element 82 is actuated in operating state B, it can strike the movable locking element 74, which in turn can strike the mill body 2 shown schematically in Figure 8a. Actuation can take place by manually pressing the section of the actuating element 82 protruding from the container lid 16.Release of the safety locking device 70 is thus mechanically blocked in operating state B. If the grinding container 10 is removed from the mill body 2, actuation of the actuating element 82 can cause it to push the movable locking element 74 out of engagement with the receptacle 80, whereby the safety locking device 70 can be released because the movable locking element 74 no longer engages with the active element 78. The safety locking device 70 can therefore only be released after the grinding container 10 has been removed from the mill body 2.

[0067] Figure 8b shows the grinding container 10 with a safety locking device 70 according to a further embodiment. The grinding container 10 is shown in operating state B of the grinding container 10, which is set up for grinding operation. The safety locking device 70 has a locking device 72, which can be arranged on the grinding bowl 18. The locking device 72 can have a movable locking element 74, which can be mounted on the grinding bowl 18. The movable locking element 74 can engage in an active element 78, which can be arranged on the container lid 16 and connected thereto in a rotationally fixed manner. The movable locking element 74 can have a locking pin 75, which can engage in a recess 73 of the active element 78.The locking device 72 can have an adjusting element 76, which can cause the movable locking element 74 to engage with the active element 78 and thus secure the container lid 16 against rotation of the container lid 16 toward the grinding bowl 18. The adjusting element 76 can be designed as a spring 77, which can be configured and arranged on the grinding bowl 18 such that it exerts an adjusting force on the movable locking element 74, which can bring about engagement with the active element 78. The spring 77 can preload the movable locking element 74 in the direction of the container lid 16.

[0068] The grinding container 10 has a locking device 71, which blocks locking of the grinding container 10 to the locking device 65 when the container lid 16 is not arranged on the grinding pot 18 in the arrangement state A of the container lid 16 on the grinding pot 18 shown in Figure 8b, and closes the latter in this state. In the operating state B of the grinding container 10, which is set up for grinding operation, the locking device 71 engages in the locking device 65 and thus blocks movement of the locking element 74, which could release the engagement of the locking pin 75 in the recess 73. The locking device 71 has a locking element 86, which is rotatably mounted on the grinding pot 18. The locking element 86 is movably connected to the locking pin 75 via an eccentric 87, to which the movable locking element 74 is hinged.If the locking pin 75 engages in the recess 73 when the container lid 16 is locked to the grinding bowl 18 in the arrangement state A, the engagement of the locking pin 75 causes the locking element 86 to rotate into a release position F, in which the locking element 86 is arranged such that it can engage the locking device 65. The rotation is effected via the eccentric 87, which is connected to the locking element 86 in a rotationally fixed manner and centrally to a rotation axis of the locking element 86 and eccentrically connected to the locking pin 75. The locking element 86 can be arranged in the engagement element 12, wherein the locking element 86 can have an element structure which, in the release position F, can be arranged in the contour of the engagement element 12 such that the bayonet lock 66 can be engaged.If the locking pin 75 does not engage the recess 73 when the container lid 16 is not locked to the grinding bowl 18 in the arrangement state A, the active element 78 or the actuating force of the actuating element 76 causes the rotation of the locking element 86 into a locked position, in which the locking element 86 is arranged such that it cannot engage the locking device 65. In the locked position, the element structure can be arranged in the contour of the engagement element 12 such that the bayonet lock 66 cannot engage.

[0069] Figure 9 shows the laboratory mill 100 in a sectional view through the control group 210, which is arranged on the mill body 2. The control group 210 is configured to set a grinding parameter for a grinding operation of the laboratory mill 100. The grinding parameter can be set manually by a user via the control group 210. The control group 210 can have a first user interface 211 and a second user interface 221. The grinding parameter can be set by the user either by actuating the first user interface 211 or the second user interface 221.

[0070] The control panel 210 can include the touchscreen 212, which can be configured as the first user interface 211. The control panel 210 can also include a rotary control 222, which can be configured as the second user interface 221. The grinding parameter can be set by the user by selectively operating the touchscreen 212 or the rotary control 222.

[0071] The rotary actuator 222 can be arranged on the touchscreen 212, wherein the rotary actuator 222 can be arranged on an outer display layer 213 of the touchscreen 212. The rotary actuator 222 can be arranged outside the touch-sensitive area 214 of the touchscreen 212. The rotary actuator 222 can be arranged on a rotary encoder 224 and magnetically coupled thereto. The rotary encoder 224 can be arranged below the outer display layer 213, wherein the rotary actuator 222 can be held on the outer display layer 213 via a contactless magnetic coupling with the rotary encoder 224, which can be designed without a mechanical holder for holding the rotary actuator 222 to the outer display layer 213. The rotary actuator 222 can thus be magnetically held to the outer display layer 213 and can be manually removed from it by the user without leaving any residue.

[0072] The rotary actuator 222 can be rotated manually to set the grinding parameter. The rotary encoder 224 can be configured to detect the set grinding parameter based on a rotation angle of the rotary actuator 222. The rotary actuator 222 can have permanent magnets 223 on the actuator side, which can be magnetically coupled to permanent magnets 225 on the encoder side. The rotary encoder 224 can be configured to detect rotation of the magnetically coupled permanent magnets 223, 225 due to manual rotation of the rotary actuator 222 by the user. The rotary encoder 224 can be connected to the control device 110 in order to communicate the set grinding parameter to the control device 110 based on a rotation angle of the rotary actuator 222.

[0073] The rotary knob 222 can also be pressed manually to adjust and / or set the set grinding parameter. The rotary knob 222 can have a further permanent magnet 226, which can be magnetically coupled to a Hall sensor 226 by pressing the rotary knob 222. The rotary encoder 224 can have the Hall sensor 226, which can be arranged under the display outer layer 213. The rotary knob 222 can be pressed against the spring force of a setting spring 221, which resets the rotary knob 222 after being pressed. The rotary encoder 224 can be configured to detect the set grinding parameter based on a magnetic coupling of the permanent magnet 227 with the Hall sensor 226. The rotary encoder 224 can be connected to the control device 110 in order to communicate the set grinding parameter to the control device 110 based on the magnetic coupling.

[0074] The operating group 210 can include the visual positioning aid 216, which can be formed on the display outer layer 213 by a light source 217 arranged beneath the display outer layer 213. Using the visual positioning aid 216, the rotary actuator 222 can be manually positioned on the display outer layer 213 such that the contactless magnetic coupling of the rotary function of the rotary actuator 222 and the magnetic coupling for the push function of the rotary actuator 222 can be configured. The LED light source 217 can be configured as an LED ring, which visualizes a target position for the contactless magnetic coupling and the magnetic coupling through the translucent display outer layer 213.The visual positioning aid 216 can thus be configured to visualize that an actual position of the rotary actuator 222 and the target position of the rotary actuator 222 on the display outer layer 213, on which the rotary actuator 222 is positioned and configured to set the grinding parameter, match or differ from each other.

[0075] Figure 10 shows a laboratory mill system 300 having two grinding tools 20, 20'. The grinding tools 20, 20' can be arranged in a modular, interchangeable manner on the mill body 2. Figure 10 shows an operating state of the modular laboratory mill system 300, in which one grinding tool 20 of the grinding tools 20', 20' is arranged on the mill body 2. The grinding tool 20 arranged on the mill body 2 can be replaced by the additional grinding tool 20'. The grinding tool 20 arranged on the mill body 2 has the comminution tools 25. The additional grinding tool 20' has a rotationally drivable grinding chamber 27.

[0076] The grinding tool 20 arranged on the mill body 2 can be arranged in the grinding container 10. The additional grinding tool 20' can also be arranged in the grinding container 10 in the operating state not shown in Figure 10, in which the additional grinding tool 20' is arranged on the mill body 2. The grinding tool 20 arranged on the mill body 2 can have the tool identifier 21, and the additional grinding tool 20' can have a further tool identifier 21'. In the respective operating state in which the respective grinding tool 20, 20' is arranged on the mill body 2, the grinding tool 20 and the additional grinding tool 21 can be connected via the contactless magnetic coupling 42 to the drive 40 for driving the respective grinding tool 20, 20'. For this purpose, the respective grinding tool 20, 20' can have the output side 43 of the contactless magnetic coupling 42. The drive 40 is connected to the control device 110 via the drive control 41.The modular laboratory mill system 300 can also include the orientation sensor 34, which can detect the operating orientation of the respective grinding tool 20, 20'. Figure 11 shows the laboratory mill 100 in a schematic representation with the control device 110, the grinding container 10, the grinding tool 20, the sensor 30, the electric drive 40, the drive control device 41, the contactless magnetic coupling 42, the spring contact 60, the vibration sensor 90, the operating group 210, and the user interfaces 211, 221.

[0077] The control device 110 can be connected to the drive control device 41 for controlling the electric drive 40 and can be configured to control the drive control device 41 for controlling the electric drive 40 and for driving the grinding tool 20. The electric drive 40 can have the drive side 45 and the output side 43 of the contactless magnetic coupling 42. The electric drive 40 can be configured to drive the grinding tool 20.

[0078] The control device 110 can be connected to the container identifier carrier 11 of the grinding container 10 via the spring contact 60 and can be configured to read the container identifier stored on the container identifier carrier 11 in order to control the electric drive 40 for driving the grinding tool 20 based on the container identifier. The control device 110 can be contactlessly connected to the tool identifier carrier 21 of the grinding tool 20 and can be configured to read the tool identifier stored on the tool identifier carrier 21 in order to control the electric drive 40 for driving the grinding tool 20 based on the tool identifier.

[0079] The control device 110 can be connected to the user group 210 and the user interfaces 211, 221 and configured to control at least one of the user interfaces 211, 221 to output a signal to a user of the laboratory mill 100. The control device 110 can also be connected to the vibration sensor 90 to read in a vibration of the laboratory mill 100 detected by the vibration sensor 90.

[0080] Figure 12 shows a flowchart with method steps for operating the laboratory mill 100 shown in Figure 11 or the laboratory mill system 300 shown in Figure 10. The method steps are shown in a chronological sequence according to one embodiment. The method steps can be performed by the control device 110.

[0081] In a step S1a, a grinding container (not shown in the figures) with which the laboratory mill 100 was equipped for holding a grinding material can be manually replaced by a user of the laboratory mill 100 with the grinding container 10 with which the laboratory mill 100 is equipped for holding the grinding material. The grinding containers can differ in at least one container-specific property. In a further step S1a, the container identifier of the grinding container 10 with which the laboratory mill 100 is equipped for holding the grinding material can be read from the container identifier carrier 11 via the spring contact 60. The spring contact 60 can be set up automatically by the user manually arranging the grinding container 10 on the mill body 2.

[0082] In a further step S2a, the container identifier of the grinding container 10, with which the laboratory mill 100 is equipped for holding a material to be ground, can be read by the control device 110. The container identifier can have identification data that can identify a container type of the grinding container 10, which can indicate a grinding container configured for continuous grinding operation or a grinding container configured for discontinuous grinding operation.

[0083] In a step S1b, a grinding tool (not shown in the figures) with which the laboratory mill 100 was equipped for comminuting the material to be ground can be manually replaced by a user of the laboratory mill 100 with the grinding tool 20 with which the laboratory mill 100 is equipped for comminuting the material to be ground. The grinding tools can differ in at least one tool-specific property. In a further step S1b, the tool identifier of the grinding tool 20 with which the laboratory mill 100 is equipped for comminuting the material to be ground can be read contactlessly from the tool identifier carrier 21 by the RFID reader 17 shown in Figure 5, which can be embodied as the RFID transponder 23 shown in Figure 3. In a further step S2b, the tool identifier of the grinding tool 20 with which the laboratory mill 100 is equipped for comminuting the material to be ground can be read in by the control device 110.The tool identifier may include identification data identifying a tool type of the grinding tool 20, which may indicate one of a rotor tool, a cutting tool, a knife tool, a disk tool, and a ball tool.

[0084] In an optional further step S2c, an operating orientation of the grinding container 10, in which the grinding container 10 is oriented relative to a mill body 2, can be read by the control device 110. The operating orientation can be detected with the orientation sensor 34 shown in Figure 2, wherein the operating orientation can include the pivot angle of the grinding container carrier 9 relative to the mill body 2.

[0085] In a further step S3, at least one control parameter for controlling the electric drive 40 can be selected by the control device 110 depending on the read-in container identifier and the read-in tool identifier. The control parameter can additionally be selected depending on the operating orientation. The control parameter can be selected for controlling an output speed of the electric drive 40 depending on the read-in container identifier and / or the read-in tool identifier. Alternatively or additionally, the control parameter for controlling an output rotational direction of the electric drive 40 can be selected depending on the read-in container identifier and / or the read-in tool identifier.

[0086] In a further step S4, the selected control parameter can be output to the drive control device 41 for controlling the electric drive 40. The control parameter can be output to control an operating speed of the grinding tool 20. Alternatively or additionally, the control parameter can be output to the drive control device 41 to control an operating direction of the grinding tool 20. In yet a further step S5, the electric drive 40 can be controlled by the control device 110 based on the control parameter in order to control the grinding operation of the laboratory mill 100 based on the control parameter. Figure 13 shows a flowchart with method steps for operating the laboratory mill 100 shown in Figure 11 or the laboratory mill system 300 shown in Figure 10. The method steps are shown in a chronological sequence according to one embodiment.The method steps can be carried out by the control device 110.

[0087] In a step V0, a ​​vibration amplitude and / or a vibration period of a vibration of the laboratory mill 100 can be detected using the vibration sensor 90 arranged on the mill body 2. In a further step, the vibration amplitude and / or vibration period detected by the vibration sensor 90 can be read into the control device 110.

[0088] In a step V1, a vibration behavior of the laboratory mill 100 during a grinding operation can be determined. The step of determining V1 of the vibration behavior can be performed when the grinding tool 20 in the grinding container 10 is rotationally driven by the electric drive 40 during the grinding operation. The vibration behavior can be determined based on the detected vibration amplitude and / or vibration period duration.

[0089] In a further step V2, a limit value for the vibration behavior of the laboratory mill 100 during grinding operation can be read in by the control device 110. The limit value can be provided by an information carrier 24 shown in Figure 3, which can be arranged on the grinding tool 20. Alternatively, the information carrier 24 can be arranged on the grinding container 10. The limit value can be a limit value for the vibration amplitude and / or the vibration period duration.

[0090] In a further step V3, it can be checked whether the determined vibration behavior indicates a critical vibration state for the milling operation, whereby it can be checked whether the determined vibration behavior exceeds the read-in limit value. In step V3, it can be checked whether the detected vibration amplitude and / or vibration period exceeds a critical vibration amplitude and / or vibration period.

[0091] In step V3, the test result can be determined that the specific vibration behavior exhibits the critical vibration state for grinding operation if the detected vibration amplitude and / or vibration period exceeds the read-in limit value for the vibration amplitude and / or vibration period. Alternatively, the test result can be determined in step V3 that the specific vibration behavior does not exhibit the critical vibration state for grinding operation if the detected vibration amplitude and / or vibration period does not exceed the read-in limit value for the vibration amplitude and / or vibration period.

[0092] In a further step V4, a technical intervention in the operation of the laboratory mill 100 can be determined based on a test result resulting from the testing step. In step V4, the technical intervention can be determined if the test result in step V3 determined that the determined vibration behavior has the critical vibration state for the grinding operation. The specified technical intervention can be maintenance, repair, or replacement of the grinding tool 20 and / or the grinding container 10, which is necessary to continue the grinding operation. The maintenance can be maintenance of the ball bearing 26 shown in Figure 3. The repair can be balancing the grinding tool 20. The replacement can be replacement of the ball bearing 26 shown in Figure 3 and / or a comminution tool 25 shown in Figure 3.

[0093] In a further step V5, a signal can be output to a user of the laboratory mill 100 via the user interface 211 of the operating group 210. The signal comprises visual technical information that visually communicates to the user that the specified technical intervention in the operation of the laboratory mill 100 is required. The signal can comprise visual information that visually communicates to the user that the maintenance, repair, or replacement of the grinding tool 20 and / or the grinding container 10 is required.

[0094] Reference symbol

[0095] Power supply

[0096] Mill body

[0097] Housing

[0098] Housing component

[0099] Addition opening

[0100] Dispensing opening

[0101] swivel joint

[0102] Swivel axis

[0103] Grinding container carrier

[0104] Grinding container

[0105] Container identifier carrier

[0106] engagement element

[0107] base plate

[0108] Floor area

[0109] Container bottom

[0110] Container lid

[0111] RFID reader

[0112] grinding pot

[0113] Grinding sieve, 20' Grinding tool, 21 1 Tool identifier carrier

[0114] axis

[0115] RFID transponder

[0116] Information carrier

[0117] Shredding tool

[0118] ball bearings

[0119] Axle mount

[0120] Grinding room

[0121] Sensor wireless data communication section

[0122] Orientation sensor electric drive drive control device contactless magnetic coupling output side

[0123] Permanent magnet pair ' permanent magnet

[0124] Drive side

[0125] rotor

[0126] electric motor

[0127] stator

[0128] Adjusting mechanism

[0129] Actuator

[0130] actuator

[0131] guide rail

[0132] guide groove

[0133] Actuator

[0134] Actuation mount

[0135] Spring contact, 62' spring contact pin, 64' contact rail

[0136] locking device

[0137] bayonet lock

[0138] End contact

[0139] Safety interlock

[0140] locking device

[0141] Locking device

[0142] recess

[0143] Locking element

[0144] locking pin

[0145] Actuator

[0146] Feather

[0147] Active element conical area

[0148] Recording

[0149] Actuating element 83 Actuating pin

[0150] 84 Reset element

[0151] 85 Return spring

[0152] 86 locking element

[0153] 87 eccentric

[0154] 90 Vibration sensor

[0155] 100 laboratory mill

[0156] 110 Control device

[0157] 210 Operating group

[0158] 211 , 221 User interface

[0159] 212 touchscreen

[0160] 213 Display outer layer

[0161] 214 touch-sensitive area

[0162] 216 Positioning aid

[0163] 217 lamps

[0164] 221 Adjusting spring

[0165] 222 rotary actuators

[0166] 223 actuator-side permanent magnets

[0167] 224 encoders

[0168] 225 encoder-side permanent magnets

[0169] 226 Hall sensors

[0170] 227 Permanent magnet

[0171] 300 laboratory mill system

[0172] A arrangement state

[0173] B Operating state

[0174] F Release position

[0175] SOa Replace grinding container

[0176] SOb Replace grinding tool

[0177] S1a Read container identifier

[0178] S1b Read tool identifier

[0179] S2a Reading container identifier

[0180] S2b Reading tool identifier

[0181] S2c Reading Operational Orientation

[0182] S3 Select control parameters 54 Output control parameters

[0183] 55 Controlling electric drive

[0184] VO Detecting Vibration

[0185] V1 Determine vibration behavior

[0186] V2 Read limit value

[0187] V3 Check vibration behavior

[0188] V4 Determine technical intervention

[0189] V5 Output Signal

Claims

Patent claims 1. A method for operating a laboratory mill (100), comprising the steps of: determining (V1) a vibration behavior of the laboratory mill (100) in a grinding operation, Check (V3) whether the specific vibration behavior has a critical vibration state for the grinding operation, Determining (V4) a technical intervention in the operation of the laboratory mill (100) based on a test result resulting from the testing step, outputting (V5) a signal via a user interface (211) to a user of the laboratory mill (100), wherein the signal comprises technical information which communicates to the user that the defined technical intervention in the operation of the laboratory mill (100) is necessary.

2. Method according to claim 1, wherein the step of determining (V1) the vibration behavior is carried out when a grinding tool (20), in particular in a grinding container (10), is operated in a rotational manner during the grinding operation.

3. The method according to claim 1 or 2, comprising the further step of detecting (V0) a vibration of the laboratory mill (100) with a vibration sensor (90) arranged on a mill body (2), wherein the step of determining (V1) the vibration behavior is carried out based on the detected vibration.

4. Method according to one of the preceding claims, with the further step of reading (V2) a limit value for the vibration behavior of the laboratory mill (100) in the grinding operation, wherein in the step of checking (V3) it is checked whether the determined vibration behavior exceeds the read-in limit value and it is determined as a test result (P) that the vibration behavior has the critical vibration state for the grinding operation if the vibration behavior exceeds the read-in limit value, and wherein the step of determining (V4) the technical intervention is carried out based on the test result.

5. The method according to claim 4, wherein in the step of reading (V2) the limit value is read in, which is provided by an information carrier (24) which a grinding tool (20) and / or a grinding container (10) has.

6. The method according to any one of the preceding claims, wherein in the step of determining (V1) the vibration behavior, at least one vibration parameter of the laboratory mill (100) is determined, which has information on at least one of a vibration amplitude of the laboratory mill (100) and a vibration period of the laboratory mill (100), and wherein in the step of checking (V3) it is checked whether the determined vibration behavior has or exceeds a critical vibration amplitude and / or a critical vibration period for the milling operation.

7. Method according to one of the preceding claims, wherein in the step of determining (V4) the technical intervention it is determined that in order to continue the grinding operation a maintenance, repair or replacement of a grinding tool (20) and / or a grinding container (10) is to be carried out, and wherein in the step of outputting (V5) the signal the signal comprises information which communicates to the user that the maintenance to be carried out, the repair to be carried out or the replacement to be carried out of the grinding tool (20) and / or the grinding container (10) is necessary.

8. The method according to claim 7, wherein in the step of determining (V4) the technical intervention it is determined that in order to continue the grinding operation the grinding tool (20) is to be balanced, and wherein in the step of outputting (V5) the signal the signal comprises information which communicates to the user that balancing of the grinding tool (20) is required.

9. The method according to claim 7 or 8, wherein in the step of determining (V4) the technical intervention it is determined that in order to continue the grinding operation a bearing of the grinding tool (20) is to be serviced or replaced, wherein in the step of outputting (V5) the signal the signal comprises information which communicates to the user that maintenance or replacement of the bearing of the grinding tool (20) is required.

10. The method according to any one of the preceding claims, wherein in the step of outputting (V5) the signal, the signal comprises visual information which visually communicates to the user that the specified technical intervention in the operation of the laboratory mill (100) is required.

11. Method according to one of the preceding claims, wherein in the step of outputting (V5) the signal, the signal is output via an operating group (210) for setting a grinding parameter for the grinding operation, the operating group (210) comprising the user interface (211).

12. Method according to one of the preceding claims, with the further step of outputting a control signal to a drive control device (41) of an electric drive (40) which is designed to transmit a torque to a grinding tool (20), wherein the control signal comprises a control command which is based on the defined technical intervention.

13. The method according to claim 12, wherein the control command is a control command for shutting down or stopping the grinding operation or the grinding tool (20) which is operated in a rotational manner in the grinding operation.

14. Control device (110) for outputting a signal via a user interface (211) to a user of the laboratory mill (100), wherein the control device (110) is configured to carry out the method according to one of the preceding claims.

15. Laboratory mill (100) for comminuting a material to be ground, which has a user interface (211) for communication with a user and the control device (110) according to claim 14 for outputting a signal via the user interface (211) to a user of the laboratory mill (100).

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