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General Mach Discussion / Re: Z-Aixis rotates in one direction only with TB6560 driver

« on: November 14, 2016, 09:07:37 AM »

When swapping the Y and Z axis, are you swapping the driver and the motor (i.e. just swapping the driver inputs) or one component at a time?  There could be a mis-wired connection between the driver and the motor itself.  If you haven't already done so, swap the actual drivers between the Y and the Z both at the input from the breakout board (you are using one and not trying to run the drivers directly from the 25-pin connector, right?) AND the output to the motor.  If the symptom switches from one axis to the other, then it's the driver.  If not, check the motor wiring.

I changed the actual driver swapping between Y and Z. The symptoms switches. It is the driver that has the problem.
Thanks.

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General Mach Discussion / Re: Z-Aixis rotates in one direction only with TB6560 driver

« on: November 13, 2016, 10:54:13 AM »

Thanks Mike. 
Sorry if that line is not clear. I swapped the Y with Z axis and tried to rotate in either direction. It worked.
You are right, there are lots of similar posts reporting problem with TB6560. Unfortunately, I read those, only got into such problem.
I will try today and if no success, then look for the better driver.

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Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: November 13, 2016, 10:46:13 AM »

My name is Senthil and live in the bay area, California. I recently took my hobby into cnc and robotics. I feel like it is magic through engineering. Hope to get more knowledge in this with the help of fellow people, online resources. Cheers. Senthil

4

General Mach Discussion / Re: Z-Aixis rotates in one direction only with TB6560 driver

« on: November 13, 2016, 09:08:56 AM »

Attached is the mach3 configuration file.

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General Mach Discussion / Z-Aixis rotates in one direction only with TB6560 driver

« on: November 13, 2016, 08:59:18 AM »

Hello, there are many such problems already reported and the directions listed in those threads did not help. I am not what I am missing. I got the CNC 3 axis running with TB6560 driver board. X-Y runs as expected. Z-axis moves in one direction only.

Check 1: What if wiring may be wrong? - I swapped the Z-axis to Y-Axis and the same wiring works there. So the wiring seems to be not a problem.

CHeck 2: Parallel port low voltage - I ordered the PCI parallel port as my original had a problem. I probed through the pin and the voltage drop is 0 to 5 v.

Check 3: Motor O/P pin config - This config is the standard pins as X (2,3); Y (4,5) and Z (6,7). I played around the active low for step and dir pin but did not help. I would also attach the config xml file in the next post in this thread.

Check 4: Running Z- axis with out load - The stepper motor is Nema-17 and isolated the z-axis from all its attachment and ran it standalone. No improvement.

Check 5: Check for the faulty motor - I used the spare Stepper for another Nema-17 and see no difference.

All these checks were done following the tips given in the other threads. Now I am struck. Please let me know if there is any way that can fix.

Thanks for the help.