Re: [CAD_CAM_EDM_DRO] calibrating cnc systems

"S.L.Ramsay" wrote:

> how in the world do you calibrate software so that it knows to turn a stepper motor or servo "X" amount of times to move an exact distance?

almost all the programs have some sort of init file that contains the
number of steps per unit of measure, ie. steps/in or steps/mm.
If you know the number of steps/rev of the motor, and the belt
reduction 9if any) and the pitch of the leadscrew, it is a simple
calculation. If the pitch of the leadscrew is not accurate, then
there will be no accurate calibration.

(On non-leadscrew machines, the diameter of the drum pulling
tapes, cables or belts, or the number of the teeth on a pinion
gear are the factor in the calculation instead of leadscrew
pitch.)

Jon