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General Mach Discussion / X axis will not change direction during cut

« on: February 28, 2009, 08:14:42 AM »

Hello all, I am new to the world of CNC so bare with me please, I have recently built a 3 axis machine using Probotix components, everything seems to work fairly well, and by that I mean I can jog motors and they don't make any horrible noises (anymore) my settings could probably use some adjusting, but the problem I am having is when running the test Roadrunner in Mach 3, all seems to work well until the x axis reaches the end of the first what I will call positive (+) cut instead of reversing and cutting back negative (-) direction it continues on to a positive cut even though Mach 3 shows it correct on the screen, the Y and Z axis are working correctly, any advise would be greatly appreciated.

The Probotix is as follows:

3x SideStep Bi-Polar Stepper Motor Driver
3x HT23-400-4 400ozin Stepper Motor
PBX-2 Parallel Port Breakout Board
24Volt 4.3Amp Switching Power Supply
6ft. DB25 Male-to-Male Cable
3x 4" IDC Cable 10-pin