Calibrating PWM Spindle RPMs by hand

[Phase]

Is there a way to calibrate the RPMs on a PWM Spindle by hand?

Meaning instead of having the electronic feedback we can just measure the actual RPMs for a series of "S" instructions and then somehow use that to derive the calibration curve for Mach3 to use.

Thanks!

[ostie01]

There is a function in the function cfg's menu.

Called calibrate spindle but never use it but maybe this is what you're looking for.

http://www.youtube.com/watch?v=GFw2V2xDizM


Jeff

[Phase]

Thanks, but unfortunately that video does use a "C3 index card" for electronic feedback.

I'm looking for a manual method to do that sort of calibration.