16482
« on: February 16, 2010, 07:13:35 PM »
I have servos on my lathe and mill spindles and a stepper on the coil winder. I however use a SmoothStepper on all of these machines and with it the Velocity is definitely Rev/min, so presuming it may well be the same for the parallel port.
Ok so here is how I think you should do it.
Steps per unit will be the amount of steps you need for one revolution, for example your stepper may be 200 per rev and you have a 10 micro step drive so steps per unit would be 2000.
Velocity would be set to the Rev/min that you want (or can get) with a servo its easy as you know what the rated speed is but with a stepper it will be trial and error, so you say you run it at 350RPM so try that for a start and see.
When you command a M3S350 that is what it should do, if you command M3S400 and you max velocity is 350 it should not attempt to do 400 but rather just go to 350, not sure if it will throw an error message or not.
Hood