Clock mechanism detection device and detection method

Abstract

A timepiece mechanism detection device is used for detecting delay time of a timepiece mechanism and comprises a main body frame; the timer is arranged on the front surface of the main body frame; the first correlation photoelectric sensor and the second correlation photoelectric sensor are respectively arranged on the main body frame and are respectively in communication connection with the timer; the releasing mechanism comprises a bottom plate, a rotating wheel and a shielding object; the bottom plate is fixed at the top of the main body frame; the rotating wheel comprises a cam penetrating through the bottom plate from the back surface of the bottom plate; the rotating shaft is connected with the top end of the cam extending from the front surface of the bottom plate; the gear sleeves the rotating shaft; the shielding object is wound and suspended on the cam through a connecting line; wherein the clock mechanism is fixed on the bottom plate and is in meshed connection with the gear, and the cam is rotated to drive the gear to rotate through the rotating shaft so as to drive the clock mechanism to rotate. The device is simple in installation, can simulate the time delay test of the clock mechanism under the conditions of different turns and different rotating torques, and has a great practical value.

Description

Technical Field

[0001] The present invention relates to the technical field of clock mechanism detection, and in particular to a clock mechanism detection device and a detection method. Background Art

[0002] As an important part of the fuze safety system, the clockwork mechanism can realize the delayed release of the safety and release mechanism. The safety and release mechanism generally uses the overload environment information during launch to release the safety. When conducting ground tests, a centrifuge is usually used to simulate the launch overload to conduct a release test to assess the performance of the clockwork mechanism. Therefore, considering the low efficiency and high cost of the centrifugal test, the present invention adopts the method of performing the initial screening of the clockwork mechanism under static conditions to improve the screening efficiency of the clockwork mechanism, so as to obtain a better effect.

[0003] It should be understood that the above statements merely provide background technology related to the present invention and do not necessarily constitute prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a clock mechanism detection device and detection method, which can not only flexibly adjust the delay test of the clock mechanism under different numbers of turns, but also simulate the delay test under different torque conditions, thereby greatly improving the efficiency of clock mechanism measurement.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a clock mechanism detection device for detecting the delay time of the clock mechanism, comprising: a main frame; a timer, fixedly arranged on the front side of the main frame; a first opposing photoelectric sensor and a second opposing photoelectric sensor, respectively arranged on the main frame, the first opposing photoelectric sensor is located above the second opposing photoelectric sensor, and the two are respectively communicated with the timer; a release mechanism, comprising a base plate, a rotating wheel and a shielding object: the base plate is fixed to the top of the main frame; the rotating wheel comprises: a cam, which is arranged through the base plate from the back side of the base plate; a rotating shaft, which is connected to the top end of the cam extending from the front side of the base plate; a gear, which is sleeved on the rotating shaft; the shielding object is wound around and suspended on the cam by a connecting line; wherein the clock mechanism is fixedly arranged on the base plate and meshed with the gear, and the gear is driven to rotate via the rotating shaft by rotating the cam, thereby driving the clock mechanism to rotate.

[0006] Preferably, the main frame includes a frame plate, a first straight plate and a second straight plate; wherein, the first straight plate and the second straight plate are respectively vertically arranged at two ends of the same surface of the frame plate, and the first straight plate and the second straight plate are respectively provided with a plurality of pairs of mounting holes of different heights, and each pair of mounting holes is respectively located at the same height on the first straight plate and the second straight plate.

[0007] Preferably, the first through-beam photoelectric sensor includes a first transmitting end and a first receiving end, the first transmitting end is mounted in a mounting hole on the first straight plate, the first receiving end is mounted in a mounting hole on the second straight plate, and is located at the same height as the first transmitting end; the second through-beam photoelectric sensor includes a second transmitting end and a second transmitting end, the second transmitting end is mounted in a mounting hole on the first straight plate, the second receiving end is mounted in a mounting hole on the second straight plate, and is located at the same height as the second transmitting end.

[0008] Preferably, the cam includes a circular portion and a protruding portion, the circular portion is arranged on the back side of the base plate, the outer diameter of the protruding portion is smaller than the outer diameter of the circular portion, and the bottom end of the protruding portion is fixedly connected to the circular portion, and the top end of the protruding portion penetrates the base plate and extends from the front side of the base plate.

[0009] Preferably, a pressure plate is provided on the side of the gear away from the base plate, and the pressure plate is fixed to the base plate by fasteners; and a first locking pin and a second locking pin are respectively provided at both ends of the pressure plate, and the pressure plate fixes the clock mechanism on the base plate through the first locking pin and the second locking pin.

[0010] Preferably, a first bearing is provided between the base plate and the gear, and a second bearing is provided between the pressure plate and the gear.

[0011] Preferably, a stop lever is fixedly provided on the circular portion of the cam and is located on the back side of the bottom plate, and the stop lever rotates with the rotation of the cam.

[0012] Preferably, a limit pin is provided on the front side of the base plate, and the top end of the limit pin penetrates through the base plate and extends from the back side of the base plate, so that the top end of the limit pin extending from the back side of the base plate can limit the rotation of the cam by blocking the blocking rod; wherein, when the limit pin locks the blocking rod, the covering is in a stationary state; when the limit pin is pulled out, the covering descends under the action of gravity and drives the rotating wheel to rotate, thereby driving the clock mechanism to rotate.

[0013] Preferably, the relative installation positions of the first and second photoelectric sensors on the main frame are adjusted to detect the delay time of different rotation numbers of the clock mechanism; and the mass of the obstruction is adjusted to detect the delay time under different rotational torque conditions of the clock mechanism.

[0014] The present invention also provides a clock mechanism detection method, which is implemented by the above-mentioned clock mechanism detection device, and includes the following steps: S1, installing and fixing the clock mechanism and the first through-beam photoelectric sensor and the second through-beam photoelectric sensor; winding and suspending the obstruction to a height higher than the first through-beam photoelectric sensor, and locking the cam by a limit pin; connecting the timer to the power supply; S2, pulling out the limit pin, and the obstruction drives the cam to rotate under the action of gravity, and then drives the clock mechanism to rotate through the gear at the same time; S3, when the obstruction drops to a position that completely blocks the light path of the first through-beam photoelectric sensor, the first contact The receiving end cannot receive the signal emitted by the first transmitting end, and the timer is triggered to start timing; S4, when the obstruction continues to descend to a position that completely blocks the light path of the second photoelectric sensor, the second receiving end cannot receive the signal emitted by the second transmitting end, and the timer is triggered to stop timing; S5, the delay time of the clock mechanism is read from the timer and recorded; S6, the obstruction is restored to the initial suspension position, the positioning pin is inserted to re-lock the cam, the timer is reset, and the next clock mechanism is replaced, and steps S2 to S6 are repeated until the detection of all clock mechanisms is completed.

[0015] To sum up, compared with the prior art, the clock mechanism detection device provided by the present invention has simple installation and operation links, can flexibly adjust the delay test of the clock mechanism under different numbers of turns, and can simulate the delay test under different torque conditions, and the measured accuracy is higher and the effect is better, which is suitable for batch production testing and has great practical value; and the clock mechanism detection method provided by the present invention is simpler, more convenient and faster than the existing measurement method, which greatly improves the efficiency of clock mechanism measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front schematic diagram of the clock mechanism detection device of the present invention;

[0017] Figure 2 It is a schematic diagram of the back side of the clock mechanism detection device of the present invention;

[0018] Figure 3 It is a front schematic diagram of the release mechanism of the present invention;

[0019] Figure 4 It is a schematic diagram of the back side of the release mechanism of the present invention;

[0020] Figure 5 A top view of the release mechanism of the present invention;

[0021] Figure 6 It is a partially enlarged schematic diagram of the release mechanism of the present invention.

[0022] In the figure:

[0023] 1. Main frame; 111. Frame plate; 112. First straight plate; 113. Second straight plate;

[0024] 2. Release mechanism;

[0025] 3. Timer;

[0026] 4. a first photoelectric sensor; 41. a first transmitting end; 42. a first receiving end;

[0027] 5. Second photoelectric sensor; 51. Second transmitting end; 52. Second receiving end;

[0028] 6. Obstructions;

[0029] 7. Bottom plate;

[0030] 8. Gears;

[0031] 9. Limit pin;

[0032] 10. Press plate;

[0033] 11. Clockwork;

[0034] 12. A first locking pin;

[0035] 13. Second locking pin;

[0036] 14. Rotating wheel;

[0037] 15. Stop lever;

[0038] 16. Rotating shaft;

[0039] 17. Cam. DETAILED DESCRIPTION

[0040] The following is combined with Figures 1 to 6 , the present invention is further explained by describing a preferred specific embodiment in detail.

[0041] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0042] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] like Figure 1 and Figure 2 As shown, the present invention provides a clock mechanism detection device for detecting the delay time of a clock mechanism 11, comprising: a main frame 1; a release mechanism 2, fixedly arranged on the top of the main frame 1; and a timer 3, fixedly arranged on the front of the main frame 1.

[0044] The main frame 1 comprises: a frame plate 111 , a first straight plate 112 and a second straight plate 113 ; the first straight plate 112 and the second straight plate 113 are respectively vertically arranged at two ends of the same surface of the frame plate 111 .

[0045] Furthermore, the clock mechanism detection device also includes a first opposing photoelectric sensor 4 and a second opposing photoelectric sensor 5; wherein the first opposing photoelectric sensor 4 includes a first transmitting end 41 and a first receiving end 42, and the second opposing photoelectric sensor 5 includes a second transmitting end 51 and a second transmitting end 52.

[0046] Furthermore, a plurality of pairs of mounting holes at different heights are respectively arranged on the first straight plate 112 and the second straight plate 113 of the main frame 1, wherein each pair of mounting holes is respectively located at the same height on the first straight plate 112 and the second straight plate 113, and the aperture size of each mounting hole is the same as the outer diameter size of the opposing photoelectric sensor.

[0047] Specifically, the first transmitting end 41 is installed in a mounting hole on the first straight plate 112, and correspondingly, the first receiving end 42 is installed in a mounting hole on the second straight plate 113 at the same height as the first straight plate 112; the second transmitting end 51 is installed in a mounting hole on the first straight plate 112, and correspondingly, the second receiving end 52 is installed in a mounting hole on the second straight plate 113 at the same height as the first straight plate 112.

[0048] To be more specific, under normal working conditions, the first transmitting end 41 transmits an optical transmission signal, and the first receiving end 42 receives the optical transmission signal emitted by the first transmitting end 41; when there is an obstruction between the two, the optical transmission signal between the two is cut off, and the first receiving end 42 cannot receive the optical transmission signal emitted by the first transmitting end 41; similarly, the same is true for the second transmitting end 51 and the second receiving end 52.

[0049] It should be noted that the installation height of the first photoelectric sensor 4 is higher than that of the second photoelectric sensor 5 , that is, the installation height of the first transmitting end 41 and the first receiving end 42 is higher than that of the second transmitting end 51 and the second receiving end 52 .

[0050] Furthermore, the timer 3 is respectively communicated with the first receiving end 42 of the first through-beam photoelectric sensor 4 and the second receiving end 52 of the second through-beam photoelectric sensor 5. When the first receiving end 42 of the first through-beam photoelectric sensor 4 does not receive the signal transmitted by the first transmitting end 41, the timer 3 is triggered to start timing; when the second receiving end 52 of the second through-beam photoelectric sensor 5 does not receive the signal transmitted by the second transmitting end 51, the timer 3 is triggered to stop timing, and finally the timing time is displayed on the timer.

[0051] Specifically, Figure 3 , Figure 4 and Figure 5 As shown, the release mechanism 2 includes: a base plate 7; a rotating wheel 14, the rotating wheel 14 includes a cam 17, a rotating shaft 16 and a gear 8; wherein, the two ends of the base plate 7 are respectively fixed to the top of the first straight plate 111 and the second straight plate 112, so as to fix the release mechanism to the top of the main frame 1; the cam 17 includes a circular portion and a protruding portion, the circular portion is arranged on the back side of the base plate 7, the outer diameter of the protruding portion is smaller than the outer diameter of the circular portion, and the bottom end of the protruding portion is fixedly connected to the circular portion, and the top end of the protruding portion penetrates the base plate 7 and extends from the front side of the base plate 7; the top end of the protruding portion extending from the front side of the base plate 7 is connected to the rotating shaft 16, and the gear 8 is sleeved on the rotating shaft 16.

[0052] Furthermore, a pressure plate 10 is provided on the side of the gear 8 away from the base plate 7, and the pressure plate 10 is fixed to the base plate 7 by fasteners, and a first locking pin 12 and a second locking pin 13 are respectively provided at both ends of the pressure plate 10, and the pressure plate 10 fixes the clock mechanism 11 on the base plate 7 through the first locking pin 12 and the second locking pin 13.

[0053] Furthermore, a first bearing is provided between the base plate 7 and the gear 8, and a second bearing is provided between the pressure plate 10 and the gear 8. The first bearing and the second bearing cooperate with the rotating shaft 16 to realize the rotation of the gear 8 under the drive of the cam 17, thereby realizing the rotation of the entire rotating wheel 14.

[0054] Further, such as Figure 4 and Figure 6 As shown, a stop rod 15 is fixedly provided on the circular part of the cam 17, so that the stop rod 15 is located on the back side of the base plate 7, and the stop rod 15 can rotate with the rotation of the cam 17; a limit pin 9 is also provided on the front side of the base plate 7, and the top end of the limit pin 9 penetrates the base plate 7 and extends from the back side of the base plate 7, so that the top end of the limit pin 9 extending from the back side of the base plate 7 can limit the rotation of the cam 17 by blocking the stop rod 15.

[0055] Furthermore, the clock mechanism 11 is arranged at a fixed position on the bottom plate 7, and the fixed position enables the clock mechanism 11 to be in meshing state with the gear 8, and the clock mechanism 11 is driven to rotate by the gear 8. It should be noted that in one detection test, the clock mechanism 11 is only allowed to adopt the same fixed position.

[0056] Further, such as Figure 1 and Figure 2 As shown, the clock mechanism detection device also includes a shielding object 6, and the shielding object 6 is wound around and suspended on the cam 17 through a connecting line; when the limit pin 9 locks the blocking rod 15, the shielding object 6 is in a stationary state. It can be understood that at this time, the first photoelectric sensor 4 and the second photoelectric sensor 5 are both in a conducting state; when the limit pin 9 is pulled out, the shielding object 6 descends under the action of gravity and drives the cam 17 to rotate, and drives the clock mechanism 11 to rotate through the gear 8. At the same time, due to the rotation of the cam 17, the connecting line wound around the cam 17 is gradually loosened, so that the shielding object 6 gradually descends; when the shielding object 6 descends to a position that completely blocks the optical path of the first through-beam photoelectric sensor 4 located at a high position (i.e., the first receiving end 42 cannot receive the signal emitted by the first transmitting end 41 at this time), the timer 3 is triggered to start timing; when the shielding object 6 continues to descend to a position that completely blocks the optical path of the second through-beam photoelectric sensor 5 located at a low position (i.e., the second receiving end 52 cannot receive the signal emitted by the second transmitting end 51 at this time), the timer 3 is triggered to stop timing, and the time required for the clock mechanism 11 to rotate a certain angle under a certain driving torque is recorded to test the delay characteristic of the clock mechanism 11.

[0057] In a preferred embodiment of the present invention, the shielding object 6 is a weight.

[0058] It can be understood that the purpose of the present invention is to test the movement time required for the gear of the clock mechanism 11 to rotate a specified angle under the condition of a certain driving torque applied by the obstruction 6, so as to verify whether the movement time of the clock mechanism 11 meets the index requirements, thereby screening out qualified clock mechanisms 11.

[0059] It should be noted that, in a preferred embodiment of the present invention, the first straight plate 112 and the second straight plate 113 are respectively provided with a plurality of pairs of mounting holes at different heights, and the first pair of photoelectric sensors 4 and the second pair of photoelectric sensors 5 can be respectively installed at the mounting holes at different heights on the first straight plate 112 and the second straight plate 113, so as to realize the delay test of different rotation numbers of the clock mechanism 11, thereby improving the testability of the product; at the same time, the delay function under different driving torque conditions can be simulated by adjusting the mass of the shielding 6, so as to perform the delay test. Among them, the delay test of different rotation numbers of the clock mechanism 11 can detect the delay time when the clock mechanism 11 rotates at different angles, so as to meet the delay time requirements of different products when rotating at a certain angle; the delay function under different driving torque conditions is simulated to meet the product's requirements for the delay time range under a certain driving torque.

[0060] The present invention also provides a clock mechanism detection method, which is implemented by using the clock mechanism detection device, and comprises the following steps:

[0061] S1, install and fix the clock mechanism 11 and the first through-beam photoelectric sensor 4 and the second through-beam photoelectric sensor 5; wrap and suspend the shielding object 6 to a height higher than the first through-beam photoelectric sensor 4, and lock the cam 17 through the limit pin 9; turn on the power supply of the timer 3;

[0062] S2, the limiting pin 9 is pulled out, and the shielding object 6 drives the cam 17 to rotate under the action of gravity, and then drives the clock mechanism 11 to rotate through the gear 8 at the same time;

[0063] S3, when the shielding object 6 drops to a position that completely blocks the optical path of the first through-beam photoelectric sensor 4, the first receiving end 42 cannot receive the signal emitted by the first transmitting end 41, and the timer 3 is triggered to start timing;

[0064] S4, when the shielding object 6 continues to descend to a position that completely blocks the light path of the second through-beam photoelectric sensor 5, the second receiving end 52 cannot receive the signal emitted by the second transmitting end 51, and the timer 3 is triggered to stop timing;

[0065] S5, reading the delay time of the clock mechanism 11 from the timer 3 and recording it;

[0066] S6, restore the shielding object 6 to the initial suspension position, insert the positioning pin 9 to re-lock the cam 17, reset the timer 3, and replace the next clock mechanism 11, repeat steps S2 to S6 until all clock mechanisms are tested.

[0067] Among them, in the above S5, the delay time is related to the weight of the selected barrier 6. The barrier 6 simulates the driving torque actually borne by the clock mechanism 11, and the application product needs a certain time delay before proceeding to the next level of movement during actual working process. Therefore, time delay needs to be achieved through the clock mechanism 11.

[0068] In summary, the clockwork mechanism detection device of the present invention has simple installation and operation links, can flexibly adjust the delay test of the clockwork mechanism under different numbers of turns, and can simulate the delay test under different torque conditions, and the measured accuracy is higher, the effect is better, it is suitable for batch production testing, and has great practical value. The present invention also provides a clockwork mechanism detection method, which is simpler, more convenient and faster than the existing measurement method, and greatly improves the efficiency of clockwork mechanism measurement.

[0069] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A clock mechanism detection device for detecting the delay time of a clock mechanism, characterized in that: include: Main frame; A timer, fixedly arranged on the front side of the main frame; A first through-beam photoelectric sensor and a second through-beam photoelectric sensor are respectively arranged on the main frame, the first through-beam photoelectric sensor is located above the second through-beam photoelectric sensor, and the two are respectively connected to the timer for communication; Release mechanism, including base plate, rotating wheel and shield: The bottom plate is fixed on the top of the main frame; The rotating wheel includes: a cam, which is arranged from the back side of the bottom plate through the bottom plate; a rotating shaft, which is connected to the top of the cam extending from the front side of the bottom plate; a gear, which is sleeved on the rotating shaft; the shielding object is wound around and suspended on the cam through a connecting line; The clock mechanism is fixedly arranged on the bottom plate and meshedly connected with the gear. The gear is driven to rotate via the rotating shaft by rotating the cam, thereby driving the clock mechanism to rotate.

2. The clock mechanism detection device according to claim 1, characterized in that: The main frame includes a frame plate, a first straight plate and a second straight plate; The first straight plate and the second straight plate are respectively arranged vertically at two ends of the same surface of the frame plate, and a plurality of pairs of mounting holes of different heights are respectively arranged on the first straight plate and the second straight plate, and each pair of mounting holes is respectively located at the same height on the first straight plate and the second straight plate.

3. The clock mechanism detection device according to claim 2, characterized in that: The first through-beam photoelectric sensor comprises a first transmitting end and a first receiving end, wherein the first transmitting end is mounted in a mounting hole on the first straight plate, and the first receiving end is mounted in a mounting hole on the second straight plate and is located at the same height as the first transmitting end; The second through-beam photoelectric sensor includes a second transmitting end and a second transmitting end, the second transmitting end is installed in a mounting hole on the first straight plate, and the second receiving end is installed in the mounting hole on the second straight plate and is located at the same height as the second transmitting end.

4. The clock mechanism detection device according to claim 1, characterized in that: The cam includes a circular portion and a protruding portion, wherein the circular portion is arranged on the back side of the base plate, the outer diameter of the protruding portion is smaller than the outer diameter of the circular portion, and the bottom end of the protruding portion is fixedly connected to the circular portion, and the top end of the protruding portion penetrates the base plate and extends from the front side of the base plate.

5. The clock mechanism detection device according to claim 1, characterized in that: A pressing plate is provided on one side of the gear away from the bottom plate, and the pressing plate is fixed to the bottom plate by fasteners; A first locking pin and a second locking pin are respectively provided at both ends of the pressing plate, and the pressing plate fixes the clock mechanism on the bottom plate through the first locking pin and the second locking pin.

6. The clock mechanism detection device according to claim 5, characterized in that: A first bearing is arranged between the bottom plate and the gear, and a second bearing is arranged between the pressure plate and the gear.

7. The clock mechanism detection device according to claim 4, characterized in that: A stopper is fixedly arranged on the circular portion of the cam and is located on the back side of the bottom plate, and the stopper rotates with the rotation of the cam.

8. The clock mechanism detection device according to claim 1, characterized in that: A limit pin is arranged on the front side of the bottom plate, and the top end of the limit pin penetrates through the bottom plate and extends out from the back side of the bottom plate, so that the top end of the limit pin extending out from the back side of the bottom plate can limit the rotation of the cam by blocking the blocking rod; Wherein, when the limit pin locks the blocking rod, the blocking object is in a stationary state; When the limiting pin is pulled out, the shielding object descends under the action of gravity and drives the rotating wheel to rotate, thereby driving the clock mechanism to rotate.

9. The clock mechanism detection device according to claim 1, characterized in that: By adjusting the relative installation positions of the first and second photoelectric sensors on the main frame, the delay time of different rotation numbers of the clock mechanism can be detected; by adjusting the mass of the obstruction, the delay time under different rotational torque conditions of the clock mechanism can be detected.

10. A clock mechanism detection method, implemented by using the clock mechanism detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, install and fix the clock mechanism and the first and second photoelectric sensors; wrap and suspend the shielding object to a height higher than the first photoelectric sensor, and lock the cam with a limit pin; connect the timer to the power supply; S2, the limit pin is pulled out, and the blocking object drives the cam to rotate under the action of gravity, and then drives the clock mechanism to rotate through the gears at the same time; S3, when the blocking object drops to a position that completely blocks the light path of the first through-beam photoelectric sensor, the first receiving end cannot receive the signal emitted by the first transmitting end, and the timer is triggered to start timing; S4, when the blocking object continues to descend to a position that completely blocks the light path of the second through-beam photoelectric sensor, the second receiving end cannot receive the signal emitted by the second transmitting end, and the timer is triggered to stop timing; S5, reading the delay time of the clock mechanism from the timer and recording it; S6, restore the shielding object to the initial suspension position, insert the positioning pin to re-lock the cam, reset the timer, and replace the next clock mechanism, repeating steps S2 to S6 until all clock mechanisms are tested.

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