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Parameter 72 may also have to be adjusted depending on how you VFD sounds. If it is very noisy or if it sounds
like it is grinding, you can try changing this anywhere from 0 to 15.
If you get a regenerative error, you can lengthen the deceleration time (parameter 8).
Auto Tuning
If your spindle is not working well, you may need to use auto tuning. Most systems will not need this.
Parameter # Description Standard
Range
71 Applied Motor 13
0,1,3,13,23,40,43,50,53
80 Motor Capacity Rated Motor kW
0.1-7.5kW
If you do not have a Mitsubishi spindle motor, just set parameter 71 to 13. Otherwise enter the motor code into
the parameter.
To auto tune your VFD, follow the instructions below.
1. Set parameter 96 to 11.
2. Press the Mode button until the MON LED turns on.
3. Press the Run button. You should see 12 in the display while the spindle motor runs. If the auto tuning is
successful, you will see the display change to 13.
4. Press the Stop/Reset button.
Auto tuning should now be complete. Make sure to exit PU mode! If your spindle is still not running well, please
call MachMotion at 573-368-7399.
Brake Resistor
For a brake resistor, you must set up two other parameters.
Parameter # Description Standard
Range
30 Regenerative Function 1
1
70 Special Regenerative Brake Duty 15
0-30%
You will have to experiment with the regenerative brake duty. If you get a regenerative error (E.OV1 through
E.OV3), then the duty is set too high. If your spindle does not stop fast enough, then the duty is too low.
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