Reversing Axis Directions
17 May 2017 18:57 - 17 May 2017 19:06 #93307
by koth442
Reversing Axis Directions was created by koth442
Hello everyone.
I recently got a basket case CNC machine dumped into my lap. One of the issues its having is the X and Y axes move in the wrong directions. Having searched the forum a bit I tried switching the sign on "OUTPUT_SCALE". This did change the direction, but the axis has severe runaway. It seems reasonable this is the result of feed forward in the controller.
LinuxCNC is giving me a following error. I'm looking into that currently.
I'm looking for suggestions on how to troubleshoot from here.
Thanks!
I recently got a basket case CNC machine dumped into my lap. One of the issues its having is the X and Y axes move in the wrong directions. Having searched the forum a bit I tried switching the sign on "OUTPUT_SCALE". This did change the direction, but the axis has severe runaway. It seems reasonable this is the result of feed forward in the controller.
LinuxCNC is giving me a following error. I'm looking into that currently.
I'm looking for suggestions on how to troubleshoot from here.
Thanks!
Last edit: 17 May 2017 19:06 by koth442.
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17 May 2017 19:05 #93308
by cts1085
Replied by cts1085 on topic Reversing Axis Directions
Change you tried changing the HAL pins to -NOT or inverse the signal on the direction of movement?
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17 May 2017 19:07 #93309
by koth442
I will look into that. Thanks!
Replied by koth442 on topic Reversing Axis Directions
Change you tried changing the HAL pins to -NOT or inverse the signal on the direction of movement?
I will look into that. Thanks!
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17 May 2017 19:58 #93310
by Todd Zuercher
Replied by Todd Zuercher on topic Reversing Axis Directions
If it is a servo, just switching the output scale sign will cause a runaway. (as you found out.) You also have to change the sign of the encoder scale.
The following user(s) said Thank You: koth442
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17 May 2017 20:04 #93311
by koth442
This was the second thing I tried.
I just tried it again just to make sure. It worked. DOH! So thank you.
Replied by koth442 on topic Reversing Axis Directions
If it is a servo, just switching the output scale sign will cause a runaway. (as you found out.) You also have to change the sign of the encoder scale.
This was the second thing I tried.
I just tried it again just to make sure. It worked. DOH! So thank you.
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