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Topics - DVSDAVIS

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I 'm hooking up a 4 Axis "StepmasterNC" motor driver box, model (SOP-2B) to a PC running Mach 3, ver 3.04.  I connected identical 4 wire stepper motors (wired identical also) to X, Y, Z & A axis. When pressing the appropriate key, +Y & -Y, +Z & -Z, +A & -A  move correctly but when pressing +X or -X, both keys move the motor in the same direction.  The same happens in MDI or if running G code. I have rearrange the interface connectors (switched motors) on the back of the motor driver box but any motor connected to the X axis only moves in one direction. Any of the four motors when connected to the Y, Z or A axis moves appropriately. My limited knowledge on electronic tells me there is something wrong with the X axis in the (SOP-2B) motor driver box. I do not think the manufacturer "StepMaster NC is still in business as my internet searches come up empty. Any help / recommendations will be appreciated.
Thanks in advance,
Brett

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