Electrical Manual
VM16,17,24,25,30 Electronic Orient Spindle
SERVING YOUR METAL CUTTING NEEDS FOR MORE THAN 25 YEARS
Drive Setting Procedure
After the motion control cards have been adjusted, the drives are tuned.
In AXIS parameters, check once again that Velocity Gain values are 0 (see above); check that Excess
Error is set to 0.500; re-home the machine.
Use the hand-held digital operator to set CN-03 on Yaskawa axis
drives. The correct value on all VM
machines is 328. CN-03 is the equivalent of a gain pot. Move an axis at 100 ipm and observe the
following error. It should be 0.050 for all axes on all machines, except rotary axes. Tweak the motion
control card gain pot for final adjustment, to get as close to 0.050 as necessary.
If the machine has analog drives, then adjust the drive gain pot to set the following error at 100 ipm to
0.050 for all axes on all machines. Once again, the final adjustment may be made by tweaking the
motion control card gain pot, if necessary.
If the axis PPU is something other than 10,000
you must tune the drives accordingly.
Example: A rotary axis has a PPU of 500. You should move the axis at 2,000 degrees per minutes (I.E.
10,000/500 x 100) and tune the drive so you see a following error of 1.000 degree (I.E. 10,000/500 x
0.050).
Test that you can achieve max rapid and that the following error at max rapid is correct. Check in
AXIS parameters to see the value for max rapid, then use the following formula:
Following error at max rapid = max rapid/100 x 0.050.
Example: A VM24 has max rapids of 800 ipm. You should see a following error of .400 at full rapid
(I.E. 800/100 x .050 = .400).
Go back into AXIS parameters and set Velocity Gain to 100. Re-home machine.
40 Rev.9
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