If your axis shutters and will not move unless moved by another force, that sounds like your acceleration is set too high. Lower the acceleration until it works well, then lower it a bit more to have a margin of safety.
IF that didn't work, try swapping the X and Y drivers. That way you will pinpoint if the issue is the driver. If the proplem persists, then there may be an issue with the motor itself.
The X and Y drivers can be easily swapped by swapping only the motor wires.
- Remove the x-axis motor wires from the X driver.
- Remove the Y motor wires from the Y driver.
- Insert the X motor wires into the Y driver.
- Insert the Y motor wires into the X driver.
Now the Y-axis will move the gantry. Test the Gantry movement by moving the Y axis using the up and down arrow keys (mach3).
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X AXIS STEPPER MOTOR STALLS AND SHUTTERS WHEN COMING FROM A STAND STILL WON'T MOVE WITHOUT PUSH BY HAND. I TOOK THE CHAINS OFF SPUN FINE WITH OUT LOAD. HAVE CHAIN HOOKED UP CAN MACHINE BACK FORTH HAND, NO HANG UPS OR ANYTHING, BUT TRY TO IT DOESN'T JUST SPINS OUT. ANY SUGGESTIONS?