Specialized Concentrated Focused
Machine Tool Debugging
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5.6. Machine Setup Detection
5.6.1. Check Electronic Gear Ratio and Pulse Equivalent
To examine whether the value of electronic gear ratio matches with that of pulse equivalent, make a
mark on any axis of the machine tool and set this marked point as the workpiece origin in the software.
Drive this marked axis to move a fixed distance by direct command input, jog or handwheel, and so on.
Measure the actual moving distance with a vernier caliper and compare whether the measured result
is equal to the distance shown in the software.
5.6.2. Examine If Any Pulse Is Lost
Direct method: mark a little dot on the surface of a workpiece blank; set this point as the workpiece
origin; repeatedly move the two axes; and then back to the workpiece origin; mark a little dot again to
observe whether this dot completely coincides with the marked dot. For servo systems, there is a more
precise met
hod: set servo driver mode as ―input pulse count mode― of the ―surveillance mode― (for
example, the parameter of YASKAWA servo is UN00C ); regulate the servo driver to display the lower
4 bits (with ―L ‖ before the count value ) in count value (hexadecimal system); set workpiece origin and
then write down the pulse count value at this time, then repeatedly dry run a procedure, then back to
workpiece origin and see whether the pulse count value at this time is the same with the original value.
For YASKAWA servo, as long as the value difference of pulse count value is no more than 4 (the
frequency of host controller is 1/4 times the frequency of pulse sent by servo drive), indicating that the
main controller sends pulses within the tolerance of 1 pulse, the control system runs normally;
otherwise, please check the pulse signal type of servo driver, and make the pulse type received by
servo in accord with the pulse type sent by the card.
5.6.3. Plasma Technology Detection
Plasma technology detection is mainly to examine whether the state of such ports as plasma, rise, fall
and cylinder changes with the actual situations, and whether parameters of plasma technology in
[Layer Parameters] window are appropriate, like time sequence and delay of plasma (arc striking), rise,
fall and cylinder and whether voltage change of the plasma power control port SVC correlates with
plasma generator power change.
