Topics

1

General Mach Discussion / Spindle Control Pins

« on: May 14, 2010, 08:40:44 PM »

Is there a way to prevent Mach 2/3 from sending a PWM signal to the spindle?  I am using a relay that will die if it is being constantly switched on and off by a PWM signal.  I only want the relay to turn on or off, thus a simple high or low should come from the step pin.  The motor has its own speed control. 

Thanks,
Nishant

2

FAQs / Step and Dir signals

« on: May 13, 2010, 07:45:05 PM »

Can someone please tell me the truth table for the step and dir signals.  In the manual, it says that the dir signal is active low, however, how can the computer tell the machine to go cw and ccw while in the low state?  Is it that high is cw and low is ccw, or the other way around? 

Thank you,
Nishant