Recording device

Abstract

The objective is to improve the usability of a recording device capable of measuring the weight of a roll. [Solution] The recording device of the present invention is characterized by comprising: a setting unit for detachably setting a roll in which a sheet is wound in a roll shape; a conveying unit for conveying the sheet supplied from the roll set in the setting unit; a recording unit for recording on the sheet conveyed from the conveying unit; a measuring unit for measuring the weight of the roll set in the setting unit; and a control unit for estimating the remaining amount of the roll set in the setting unit based on a first measurement value obtained by the measuring unit before the sheet is supplied to the conveying unit and a second measurement value obtained by the measuring unit after the sheet has been supplied to the conveying unit for the first time.

Description

Technical Field

[0001] The present invention relates to a recording apparatus.

Background Art

[0002] Patent Document 1 describes a recording apparatus that pulls out a sheet from a roll in which the sheet is wound in a roll shape and records an image. In this recording apparatus, the weight of the roll can be measured, and the remaining amount of the roll can be calculated from the weight.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in Patent Document 1, when the weight is measured in the state immediately after recording, since the weight decreases by the amount of the sheet pulled out, an error occurs in the estimation of the remaining amount of the roll. Therefore, in order to correctly measure the remaining amount, it is necessary to measure the weight in a state where the pulled-out sheet is wound up again. Thus, there has been room for improvement in the usability of a recording apparatus capable of measuring the weight of a roll.

[0005] Therefore, an object of the present invention is to improve the usability of a recording apparatus capable of measuring the weight of a roll.

Means for Solving the Problems

[0006] The recording device of the present invention is characterized by comprising: a setting unit for detachably setting a roll in which a sheet is wound in a roll shape; a conveying unit for conveying the sheet supplied from the roll set in the setting unit; a recording unit for recording on the sheet conveyed from the conveying unit; a measuring unit for measuring the weight of the roll set in the setting unit; and a control unit for estimating the remaining amount of the roll set in the setting unit based on a first measurement value obtained by the measuring unit before the sheet is supplied to the conveying unit and a second measurement value obtained by the measuring unit after the sheet has been supplied to the conveying unit for the first time. [Effects of the Invention]

[0007] This invention improves the usability of a recording device capable of measuring the weight of a roll. [Brief explanation of the drawing]

[0008] [Figure 1] This is a diagram showing the external appearance of the recording device. [Figure 2] This is a schematic cross-sectional view of the main part of the recording device. [Figure 3] This is an explanatory diagram of the roll support member in a recording device. [Figure 4] This is a side cross-sectional view of a recording device with its main components omitted. [Figure 5] This is a block diagram of the control system for the recording device. [Figure 6] This is a flowchart for calculating the difference in weight. [Figure 7] This is a flowchart for estimating the remaining amount of roll. [Figure 8] This is a flowchart for estimating the type of role. [Figure 9] This is a flowchart comparing the estimated and set types of roles. [Modes for carrying out the invention]

[0009] Hereinafter, an example of an embodiment of the recording device, transport device, transport method, and control method will be described in detail with reference to the attached drawings. Note that the following embodiments are not intended to limit the present invention, and not all combinations of features described in these embodiments are essential to the solutions of the present invention. Furthermore, the relative positions and shapes of the components described in the embodiments are merely illustrative and are not intended to limit the scope of this invention to them alone.

[0010] <Recording device> The recording device of this embodiment will be described using Figures 1, 2, and 5. Figure 1 is a diagram showing the external appearance of the recording device 100 according to this embodiment. Figure 2 is a schematic cross-sectional view of the main part of the recording device 100. Figure 5 is a block diagram for explaining the control system in the recording device 100.

[0011] The recording device 100 includes a setting unit 105 for setting the roll 209, a recording unit 400 for recording images on the sheet 1 supplied from the setting unit 105, and an outlet for discharging the sheet 1 recorded in the recording unit 400. The setting unit 105 is located on the opposite side of the recording unit 400 from the outlet 110. Alternatively, the setting unit 105 may be located at the position of setting unit 105', which is below the outlet 110 of the recording device 100. The sheet 1 supplied from the roll 209 set in the setting unit 105 is supplied from the conveying unit. The conveying unit conveys the sheet 1 toward the recording unit 400. The sheet 1 recorded in the recording unit 400 is discharged from the outlet 110 and loaded onto the loading unit 101 for stacking the sheets 1.

[0012] The recording device 100 includes an operation button 102 as setting means for setting the recording mode and information such as that of the roll 209, and a display panel 103 as a display unit for displaying various recording information and setting results. Further, the recording device 100 houses ink tanks that store color inks such as black, cyan, magenta, and yellow, and has an ink tank unit 104 for supplying ink to a recording head (not shown) which is an example of a droplet ejection head. In the direction in which the sheet 1 is conveyed, the recording device 100 has a set portion on the upstream side and a discharge port on the downstream side.

[0013] Incidentally, the recording device 100 shown in FIG. 1 is a recording device capable of recording on rolls 209 of a plurality of types of widths up to a 60-inch size roll 209. As the medium for recording with the recording device 100, a roll 209 or cut paper can be used. Further, the medium for recording is not limited to paper, and may be, for example, cloth or vinyl.

[0014] Also, for example, various modifications are possible based on the gist of the present invention for a line printer in which the head is a long type or a home printer in which the device size is smaller than that of the embodiment.

[0015] As shown in FIG. 2(a), the sheet 1 is wound around the roll core 211 in a roll shape for the roll 209.

[0016] The roll 209 is set in the set portion 105 of the recording device 100 in a state where it is inserted into the roll support member 204 of the roll core 211. The roll 209 is detachable from the set portion 105. The sheet 1 of the roll 209 set in the set portion 105 is supplied to the conveyance unit by the user.

[0017] The measurement unit 301 is arranged to be adjacent to the lower part of the setting unit 105. The measurement unit 301 is composed of a measuring instrument such as a strain gauge for measuring weight. If the weight of the roll 209 including the setting unit 105 can be measured, the measurement unit 301 may be arranged separately. Also, as shown in Fig. 2(b), the recording device 100 may be configured such that the roll 209 is connected by the roll support member 204 and the packing box 106. The packing box 106 has a connection part for inserting the end of the roll support member 204 and is detachable. Also, the packing box 106 and the setting unit 105 are arbitrarily fixed by a connection part not shown. At this time, the measurement unit 301 is configured to contact the lower part of the setting unit 105 so that the weight of the roll 209 including the packing box 106 can be measured.

[0018] The recording device 100 includes a conveyance roller 311 which is a conveyance unit of the sheet 1 and a driven roller 312 which abuts on the conveyance roller 311 and rotates drivenly. The driven roller 312 can be moved away from and towards the conveyance roller 14 and the nip force can be adjusted by a nip force adjustment motor 322. The conveyance unit conveys the sheet 1 drawn from the roll 209 along the sheet conveyance path to the recording unit 400 where an image can be recorded. The conveyance roller 311 is conveyed in the downstream direction by a conveyance motor 321 which will be described later.

[0019] A rotation amount sensor 320 is connected to the conveyance roller 311 and the rotation amount can be detected. Since the conveyance amount per rotation of this conveyance roller 311 is known, the amount (length) of the conveyed sheet 1, that is, the amount (length) of the conveyed sheet 1 can be obtained from the rotation angle of the conveyance roller 311.

[0020] The recording unit 400 records an image on the sheet 1 by ejecting ink from an inkjet-type print head 315. The print head 315 ejects ink from its ejection port using an ejection energy generating element such as an electrothermal conversion element (heater) or a piezoelectric element. The print head 315 is not limited to an inkjet recording method, nor is the printing method of the recording unit 400 limited; for example, it may be a serial scan method or a full line method. In the case of a serial scan method, the image is recorded in conjunction with the transport operation of the sheet 1 and the scanning of the print head 315 in a direction intersecting the transport direction of the sheet 1. In the case of a full line method, a long sheet 1 extending in a direction intersecting the transport direction of the sheet 1 is used, and the image is recorded while the sheet 1 is transported continuously.

[0021] The platen 316 of the recording unit 400 faces the print head 315 and supports the sheet 1 from below. The cutter 317 cuts the sheet 1 on which the image has been recorded.

[0022] The CPU 318 of the recording device 100 controls the transport of the sheet 1, weight detection, rotation detection of the roll 209, and various parts of the recording device 100, including the display panel 103 and the recording unit 400, according to the control program stored in the ROM 331.

[0023] The memory unit 350 consists of a ROM 331, a RAM 330, and a non-volatile memory (e.g., EEPROM) not shown. The CPU 318 reads and writes data to the memory unit 350.

[0024] The CPU 318 is also connected to various external devices 500, including host devices such as personal computers, via an external interface (not shown), and exchanges various information such as print data with the external devices 500. The CPU 318 also writes and reads information related to sheet 1 to and from the RAM 330.

[0025] The CPU 318 receives input from the operation buttons 102, including the type and width of sheet 1, as well as various setting information. The CPU 318 stores the information of the roll 209 entered by the user in the storage unit 350. The storage unit 350 also stores the basis weight (weight per unit area) and size for each type of roll 209. The CPU 318 may also be configured to acquire information of the roll 209 from an external device 500 via a network.

[0026] The CPU 318 controls the recording operation of the print head 315 of the recording unit 400 onto the roll 209. The CPU 318 also controls the cutting operation of the roll 209 using the cutter 317.

[0027] The transport motor 321 is a motor for driving the transport roller 311 and constitutes a rotationally driveable drive mechanism (rotation mechanism) for transporting the sheet 1. The nip force adjustment motor 322 is a motor for adjusting the nip force applied to the driven roller 312, which will be described later. The roll sensor 319 is a sensor for detecting that the roll 209 has been set in the setting unit 105. The rotation amount sensor 320 is a sensor for detecting the amount of rotation of the transport roller 311 and is, for example, a rotary encoder that outputs a number of pulses corresponding to the amount of rotation of the transport roller 311.

[0028] <Structure of the roll support member> The roll support member 204 that supports the roll 209 will be explained using Figure 3. The roll support member 204 comprises a spindle 19, a reference flange 21, and a non-reference flange 22.

[0029] When attaching the roll support member 204 to the roll 209, the user first removes the non-reference side flange 22 fitted onto the spindle 19, and then inserts the spindle 19 onto the winding core 211 of the roll 209 (Figure 3(a)). The outer diameter of the spindle 19 is smaller than the inner diameter of the winding core 211 of the roll 209, creating a gap between them. Therefore, the user can insert the spindle 19 onto the winding core 211 with minimal force.

[0030] In this way, as shown in Figure 3(b), the roll 209 is attached to the roll support member 204. Then, as shown in Figure 3(c), the user completes setting the roll 209 by fitting both ends of the spindle 19 on the roll support member 204 into the spindle holder 24 of the setting section 105. The spindle holder 24 is provided at positions corresponding to each end of the spindle 19. The inner surface of the spindle holder 24 is formed in a U shape. Therefore, the ends of the spindle 19 can be fitted into the spindle holder 24 from the opening side.

[0031] The spindle holder 24 acts as a support that allows the roll 209 to be pulled out by supporting the roll support member 204, and the position of the roll 209 relative to the recording device 100 is precisely determined. In this way, by using the spindle 19 to hold the roll 209, the roll 209 is set in the setting section 105 regardless of its width. For this reason, rolls 209 of various widths, from large sizes such as A0 and A1 to small sizes, that are less than or equal to the length of the spindle 19, can be set. In addition, since the end of the roll 209 is fitted into the reference side flange 21 fixed to the spindle 19, the position of the reference side end of the roll 209 is fixed constant with respect to the roll support member 204.

[0032] With the roll support member 204 fitted into the spindle holder 24, the user pulls out the leading edge of the sheet 1 from the roll 209 and sets the leading edge of the sheet 1 on the conveyor roller 311. In this embodiment, the user supplies the sheet 1 to the conveyor roller 311, but the setting unit may be configured to automatically supply the sheet 1 to the conveyor roller 311.

[0033] The recording device 100 has a roll sensor 319. The roll sensor 319 detects whether a roll 209 is set in the setting unit 105.

[0034] The set section 105 is provided with a measuring section 301 for measuring the weight of the roll 209.

[0035] Specifically, it is positioned in contact with the lower part of the spindle holder 24. The measuring unit 301 is a weight measuring device, such as a strain gauge. When a strain gauge is used with the measuring unit 301, the measurable weight of the roll 209 is as follows:

[0036] If the maximum weight applied to the measuring section 301, including the roll 209, is 15 kg, then the strain gauge value will be maximum when measuring a weight of 15 kg. Since the strain gauge has an analog output, for example, if a 10-bit AD converter is used, 10 bits = 1024 15000 / 1024 = 14.64 This allows for measurements in increments of approximately 15 grams.

[0037] Now, if we change the AD converter to 20 bits, then 20 bits = 1048576 15000 / 1048576=0.014 This allows for measurements in increments of approximately 0.01g. While strain gauges that measure weights on the order of kilograms cannot achieve accuracy to the 0.01g level, they can measure in increments of 1g.

[0038] <Weight measurement> Now, let's explain the weight measurement process. When measuring the weight of the roll 209 set in the setting unit using the measuring unit 301, the measured weight is given by "W = W1 + W2 + W3" using W1 to W3.

[0039] Here, W1 to W3 are defined as follows: W1: Weight applied to the measuring section 301 when the roll 209 is not set (including the roll support member 204) (fixed value: value measured in advance) W2: Weight of the 211mm core (fixed value: pre-measured value) W3: Weight of Roll 209 (Variable value: Value calculated from calculation) W: Total weight (variable value: value measured by weight measurement) The weight W3 of roll 209 is calculated by subtracting the weights of W1 and W2 from W. However, the weight W3 of roll 209 measured by the measuring unit 301 is subject to error due to the amount that sheet 1 has been transported by the transport unit. This error is the difference between the weight of roll 209 before sheet 1 is transported and the weight of roll 209 after sheet 1 is transported.

[0040] Here, Figure 4 shows a cross-sectional view of the recording device in each state of the sheet 1 on the roll 209 at the setting section 105. The setting section 105 is considered the upstream, and the direction in which the sheet 1 advances is considered the transport direction.

[0041] As shown in Figure 4(a), the roll 209 is set in the setting unit 105, and the sheet 1 has not yet been supplied from the roll 209 to the conveying unit. Therefore, the measuring unit 301 can measure the weight of the roll 209, which is not affected by the conveying rollers 311. At this time, the weight measured by the measuring unit 301 is taken as the measured value (A) before the sheet was supplied to the conveying unit.

[0042] As shown in Figure 4(b), this is the state after the sheet 1 has been supplied to the conveying section where it is first gripped by the conveyor roller 311 and the driven roller 312, compared to the state in Figure 4(a). The weight measured by the measuring unit 301 at this position for the first time after the sheet has been supplied to the conveying section (B1) is defined as the measured weight after the sheet has been supplied to the conveying section for the first time, after the measured weight (A) has been measured.

[0043] Since Sheet 1 is pulled out, the measured value (B1) is smaller than the measured value (A). The difference between this measured value (A) and the measured value (B1) is taken as the calculated value. The storage unit 350 stores this calculated value.

[0044] As shown in Figure 4(c), the sheet 1 is transported further from the transport unit from the state shown in Figure 4(b), an image is recorded in the recording unit 400, and the sheet is cut by the cutter 317. The cut downstream sheet 1 is discharged through the discharge port 110. After the upstream sheet 1 is cut by the cutter 317, it returns to the transport unit position shown in Figure 4(b). At this time, the weight of the roll 209 can be accurately calculated by adding the calculated value to the measured value (B2), which is the weight of the roll 209 measured by the measuring unit 301 after it has been supplied to the transport unit for the second time or later. In other words, when the roll returns to the transport unit position shown in Figure 4(b) after the recording operation, the weight of the roll 209 can be accurately calculated by adding the calculated value to the measured value (Bn), which is the weight of the roll 209 measured by the measuring unit 301 after it has been supplied to the transport unit for the second time or later.

[0045] Once the weight of roll 209 can be accurately calculated, the remaining amount of roll 209 can be estimated.

[0046] Furthermore, since the basis weight, which is the weight per unit area of ​​roll 209, can be calculated, it is possible to estimate the type of roll 209 that has been set.

[0047] <Estimating remaining roll quantity> The process for estimating the remaining amount is explained using Figures 4, 6, and 7. Here, the width corresponding to sizes such as A0 and A1, the length of the remaining amount in the transport direction, the basis weight which is the weight per unit area of ​​sheet 1, and the weight of the roll 209 set in the set unit 105 are expressed as follows: ·Width: L1 • Remaining amount (length): L2 ·Basic weight: T ·Weight:W

[0048] Using these values, the basis weight is given by T = W / (L1 × L2). Therefore, the remaining amount on the roll can be calculated using the basis weight T with the following equation L2 = W / (T × L1). However, as shown in Figure 4, measuring the weight with sheet 1 pulled out results in an error in the remaining amount. Therefore, it is necessary to calculate the difference in weight.

[0049] Figure 6 is a flowchart of the control unit that calculates the difference during weight measurement. In S400, the user sets the roll 209 in the setting unit 105. This state is the same as in Figure 4(a). That is, the roll 209 is set in the setting unit 105, and the sheet 1 has not yet been pulled out from the roll 209. In S401, the CPU 318 causes the measuring unit 301 to measure the weight of the roll 209. At this time, the CPU 318 stores the weight measured by the measuring unit 301 as the measured value (A) in the storage unit 350.

[0050] In S402, the sheet 1 on the roll 209 is supplied to the position of the transport roller 311, which is the transport unit. This state is shown in Figure 4(b). In other words, the sheet 1 is pulled out to the position where it is sandwiched between the transport roller 311 and the driven roller 312. Note that the user supplies the sheet 1 here, but the sheet 1 may be supplied automatically from the setting unit 105.

[0051] In S403, the CPU 318 causes the measuring unit 301 to measure the weight of the roll 209, and stores the weight measured by the measuring unit 301 as the measured value (B1) in the storage unit 350.

[0052] In S404, CPU318 calculates the difference between measured value (A) and measured value (B1). In S405, the CPU 318 stores the calculated value in the storage unit 350. In S406, the CPU 318 terminates the flowchart for calculating the weight difference. As a result, the CPU 318 can read the calculated value from the memory unit 350 at any time.

[0053] Figure 7 is a flowchart for estimating the remaining amount of roll. The following describes the operation after calculating the value in Figure 6. In S500, CPU318 begins estimating the remaining amount of roll 209.

[0054] In S501, with the sheet 1 being transported to the transport unit, the CPU 318 instructs the measuring unit 301 to measure the weight of the roll 209 set in the setting unit 105. The CPU 318 takes the weight measured by the measuring unit 301 as the measured value (Bn) and stores it in the storage unit 350.

[0055] In S502, CPU318 calculates the remaining amount of roll as "Wc = calculated value + (measured value (Bn))" by adding the measured value (Bn) and the calculated value.

[0056] In S503, the CPU318 uses the calculated weight (Wc) as the remaining capacity of the sheet and displays the remaining capacity on the display panel 103. In S504, CPU318 completes the remaining capacity estimation.

[0057] In this example, S503 shows the weight as the remaining amount, but since the CPU 318 stores the basis weight T, which is the weight per unit area, as information about the roll 209 in the memory unit 350, it may also calculate and display the length of the roll 209 from the weight of the roll 209.

[0058] As a result, the usability of a recording device capable of measuring the weight of a sheet can be improved.

[0059] <Estimating the type of roll> Knowing the weight and transport volume of roll 209 allows us to calculate the basis weight (weight per unit area of ​​the sheet), and thus estimate the type of roll 209.

[0060] In this embodiment, the user sets the type information of the roll 209 set in the setting unit 105 using the operation button 102. The CPU 318 reads the basis weight, which is the weight per unit area, stored in the storage unit 350 from the type information of the roll 209 set by the user. The CPU 318 can determine whether the type information of the roll 209 set by the user is correct by comparing this basis weight with the basis weight calculated by measurement. If the calculated basis weight and the set basis weight do not match, the CPU 318 can display a message on the display panel 103 prompting the user to confirm the type information of the roll 209. The process for estimating the type of roll 209 is explained using Figures 4, 8, and 9.

[0061] Here, the width corresponding to sizes such as A0 and A1, the length of the conveyed sheet 1, the rotation angle of the conveying roller, the outer diameter of the media, the basis weight (weight per unit area of ​​the sheet), the weight of the conveyed sheet 1, the measured value (B1), and the measured value (B2) are expressed as follows. ·Width: L1 • Conveying volume (length): L3 • Rotation angle: θ • Media outer diameter: D ·Basic weight: T ·Weight:Wd • Measured value (B1): Wi1 • Measurement value (B2): Wi2 Using these, the basis weight can be calculated as T = Wd / (L1 × L3). Therefore, it is necessary to determine the transported length L3 and the weight Wd of the transported sheet 1. The weight Wd of the transported sheet 1 can be calculated by subtracting the weight of Wi2 from the weight of Wi1.

[0062] Figure 8 is a flowchart for estimating the type of roll 209 in the initial recording. In S600, the CPU 318 starts estimating the type of roll 209. At this time, the measured value (B1) described in Figure 6 has already been acquired. Subsequently, the CPU 318 performs a recording operation on sheet 1 to record an image on sheet 1. Sheet 1 with the recorded image is cut by the cutter 317 on the upstream side of sheet 1. The cut sheet 1 is transported in the reverse direction to the position shown in Figure 4(b) for the next recording.

[0063] In S601, the CPU 318 calculates the length (L3) of the cut sheet 1 from the amount of transport using the value calculated from the rotation amount sensor 320 of the transport roller 311, and performs the calculation "D × π × (θ / 360) = L3".

[0064] In S602, the CPU 318 uses the measured weight (B2), which is the weight measured by the measuring unit 301 after transport, the measured weight (B1), which is the weight before transport, and the length of the transported amount to calculate the basis weight, which is the weight per unit area of ​​sheet 1. The basis weight is calculated using the formula "T = (Wi1 - Wi2) / (L1 × L3)".

[0065] In S603, based on the calculation results, the CPU 318 refers to the information of the roll 209 from the list of basis weights for each type of roll 209 recorded in the storage unit 350, and identifies the type of roll 209 that matches. The CPU 318 stores the result in the storage unit 350. The process ends at S604.

[0066] The information of the roll 209 set in the setting unit 105 of S603 is pre-stored in the storage unit 350, but it may also be accessed via a network through an external device 500. This allows us to estimate the type of roll 209 from the measured results.

[0067] Next, we will explain how to determine the type information of roll 209 that the user set when they set roll 209 in the setting unit.

[0068] Figure 9 is a flowchart comparing the estimated and set types of Roll 209. In S700, CPU318 begins estimating the type of role 209. In S701, the CPU 318 refers to the information of the roll 209 set in the set unit 105, which is stored in the storage unit 350 and registered by the user when the roll 209 is set in the set unit 105.

[0069] In S702, the CPU318 reads out the information about the estimated type of roll 209, which was estimated in S603 in Figure 8. In S703, the CPU 318 determines whether the type of roll 209 set in the configured set unit 105 matches the roll type estimation. If the compared information does not match, the process proceeds to S704; if it does match, the process proceeds to S705.

[0070] In S704, the CPU 318 determines that the type information of the role 209 set by the user via the operation button 102 may be incorrect, and displays a notification on the display panel 103 asking the user if the setting is correct. At S705, CPU318 completes the estimation of the type of role 209.

[0071] Based on the above, it is possible to estimate the type of role 209 and prompt the user to confirm whether their settings are correct. This improves the usability of recording devices that can measure the weight of a sheet.

[0072] (Other examples) The present invention can also be realized by supplying a program that implements one or more of the functions of the above-described embodiments to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. It can also be realized by a circuit (e.g., an ASIC) that implements one or more functions.

[0073] The embodiments described above are merely representative examples, and various modifications and changes can be made to each embodiment when implementing the present invention. [Explanation of symbols]

[0074] 100 Recording device 105 Set Section 301 Measuring part 311 Conveyor roller 315 Printhead 318 CPU

Claims

1. A set section that allows the roll of sheet material to be attached and detached, A conveying unit that conveys sheets supplied from rolls set in the aforementioned setting unit, A recording unit that records information on the sheet transported from the transport unit, A measuring unit for measuring the weight of the roll set in the set unit, A first measurement value obtained by measuring the roll set in the setting section before the sheet is supplied to the conveying section, A recording device comprising: a control unit that estimates the remaining amount of a roll set in the set unit based on a second measurement value measured by the measuring unit on the roll set in the set unit after the sheet has been supplied to the conveying unit for the first time; and a control unit that estimates the remaining amount of a roll set in the set unit.

2. The recording device according to claim 1, characterized in that the control unit estimates the remaining amount of the roll by adding a measured value obtained by measuring the roll set in the set unit with the calculated value which is the difference between the first measured value and the second measured value.

3. The recording device according to claim 2, characterized in that the control unit estimates the remaining amount on the roll as the length of the sheet from the basis weight, which is the weight per unit area of ​​the sheet.

4. Equipped with a display unit that displays information, The recording device according to claim 3, characterized in that the display unit displays the remaining amount of roll estimated by the control unit.

5. The transport unit is equipped with an encoder for measuring the amount of sheets transported by the transport unit, The recording device according to claim 3, characterized in that the control unit estimates the type of roll based on the amount of conveyance measured by the encoder.

6. The set section has a setting means for the user to set the type of roll set in the set section, The recording device according to claim 5, characterized in that the control unit determines whether the estimated type of roll matches the type of roll set by the setting means.

7. Equipped with a display unit that displays information, The recording device according to claim 6, characterized in that, if the estimated roll type does not match the roll type set by the setting means, the control unit displays a notification on the display unit asking whether the setting of the setting means is correct.

8. A set section that allows the roll of sheet material to be attached and detached, A conveying unit that conveys sheets supplied from rolls set in the aforementioned setting unit, A recording unit that records information on the sheet transported from the transport unit, A measuring unit for measuring the weight of the roll set in the set unit, Equipped with, A first measurement value measured by the measuring unit of the roll set in the setting unit after the sheet has been supplied to the conveying unit, If the sheet is transported in the transport unit after the first measurement is taken, the second measurement taken by the measuring unit of the roll set in the set unit, The amount of sheets transported by the transport unit after the first measurement is taken, A recording device characterized by comprising a control unit that estimates the type of roll set in the set section based on the following.

9. The recording device according to claim 8, further comprising an encoder for measuring the amount of sheets conveyed by the conveying unit.

10. The set section has a setting means for the user to set the type of roll set in the set section, The recording device according to claim 9, characterized in that the control unit determines whether the estimated roll type matches the roll type set by the setting means.

11. The recording device according to claim 10, further comprising a display unit for displaying information, wherein the control unit displays a notification on the display unit to inquire whether the setting of the setting means is correct if the estimated roll type does not match the roll type set by the setting means.

12. The recording apparatus according to any one of claims 1 to 11, characterized in that the recording unit is an inkjet recording device.

13. The recording device according to claim 12, characterized in that it has an outlet for discharging a sheet, and the set section is arranged on the opposite side of the recording section from the outlet.

14. The recording device according to claim 13, characterized in that it has an outlet for discharging a sheet, and the set section is located below the outlet.

Images