Overshoot problem
24 Feb 2016 09:35 #70562
by SKH
Overshoot problem was created by SKH
Hi, We are using LinuxCNC on a 6 axis robotic arm. After homing when we try to move it to a specific point it always goes beyond the point. We checked each axis one by one. It looks like each axis has the same problem. It happens both in the running state and jogging state. We tried lowering the speed and adjusting the acceleration values. But it didn't work. What would be the problem???
Below image shows what happens when one axis moves between two specific points again and again.
Below image shows what happens when one axis moves between two specific points again and again.
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24 Feb 2016 11:44 #70564
by Rick G
Replied by Rick G on topic Overshoot problem
Are you sure the SCALE for each axis is correct?
Rick G
Rick G
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- Todd Zuercher
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24 Feb 2016 14:27 #70572
by Todd Zuercher
Replied by Todd Zuercher on topic Overshoot problem
Is this a step motor system? Are you sure your not just missing steps?
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24 Feb 2016 14:29 #70573
by PCW
Replied by PCW on topic Overshoot problem
How are the drives interfaced?
is the scale correct, how much is the error (shift) for each move?
If using step/dir i would suspect the step timing, voltage levels or noise
if this is a servo system with encoder feedback to LinuxCNC, i would suspect noise in the encoders signals
is the scale correct, how much is the error (shift) for each move?
If using step/dir i would suspect the step timing, voltage levels or noise
if this is a servo system with encoder feedback to LinuxCNC, i would suspect noise in the encoders signals
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