My mill does not send a tach signal back to the control computer but the spindle speed is visible on the motor controller.
Since I dont have a tach signal I cannot auto-calibrate the spindle.
I wish there was a way to manually enter the spindle speed vs PWM %.

I am sure this feature would be widely appreciated!

Is there a way to manual edit linear.dat or something I can do to achieve manual calibration?

Thanks for a great program!

I second this request! With the mass proliferation of analog voltage vfd controls, I think this would be a helpful feature. I type 15000 into the spindle section and I get 14683. It is repeatable. If I can calibrate manually I could get better accuracy on the vfd.

Can you not achieve the same thing by playing around with the pulley ratios in the spindle section?

No you cannot. If everything was linear the yes. But nothing is.

They really need to put in a proper calibration system.

Like you it increments the PWM up 5% and asks you to enter the RPM.
It continues that all the way up to 100%.
Then it builds a proper relationship between RPM and PWM.

Such a simple feature, I cannot believe it has not been implemented!