上海维宏电子科技股份有限公司
SHANGHAI WEIHONG ELECTRONIC TECHNOLOGY CO., LTD.
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Check Pulse through Two Points
To check pulse through two points, do the following:
1. Make a dot on the surface of a workpiece with laser and set this dot as the
workpiece origin.
2. Repeatedly move the machine tool without actual machining, and return to the
workpiece origin.
3. Make a dot again with laser and check whether it completely coincides with the
marked dot in step 1:
– If it does, no pulse is lost and the system runs normally.
– If it does not, pulse lost. You need to check the machine tool.
Check Pulse through Servo Drive
To check pulse through servo drive, do the following:
1. Set drive parameter Surveillance Mode to Input Pulse Count Mode.
For a YASKAWA servo drive, the parameter is UN00C.
2. Regulate the servo drive to display lower 4 bits (with “L” before the count
value) in count value (hexadecimal system), set the workpiece origin and
record the current pulse count.
3. Repeatedly move the machine tool without actual machining, and return to the
workpiece origin.
4. Check and compare the current pulse count with the original value:
– For a YASKAWA servo drive, check whether the difference is greater
than 4 (the frequency of pulse sent by servo drive is 1/4 times the
frequency of main controller):
• ≤4: the main controller sends pulses within the tolerance of one
pulse and the system runs normally.
• 4: check the pulse signal type of the servo drive, and make the pulse type received
by servo drive the same with the pulse type sent by board card.
– For other servo drives, check whether the current pulse count is the
same with the original count:
• Same: no pulse is lost and the control system runs normally.
• Different: check the pulse signal type of the servo drive, and make
the pulse type received by servo drive the same with the pulse
type sent by board card.
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