Different acceleration across joints
23 May 2024 08:20 - 23 May 2024 08:22 #301188
by pavel7890
Different acceleration across joints was created by pavel7890
I have XYZ router. X and Y axes have the same rate of acceleration, 800mm/s/s . Z axis has a bit slower acceleration rate 400mm/s/s.
Now, what suppose to be in [TRAJ] section and MAX_LINEAR_ACCELERATION?
The INI setup for MAX_LINEAR_ACCELERATION is now taken from X and Y axes, 800mm/s/s.
The reason I ask, I can see that during rapid movement of Z axis for safe distance above the part, Z does not seem to finish Z distance, so X or Y movements already started.
Now, what suppose to be in [TRAJ] section and MAX_LINEAR_ACCELERATION?
The INI setup for MAX_LINEAR_ACCELERATION is now taken from X and Y axes, 800mm/s/s.
The reason I ask, I can see that during rapid movement of Z axis for safe distance above the part, Z does not seem to finish Z distance, so X or Y movements already started.
Last edit: 23 May 2024 08:22 by pavel7890.
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- tommylight
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23 May 2024 15:00 #301209
by tommylight
Replied by tommylight on topic Different acceleration across joints
What version of LinuxCNC?
That was an issue quite a while back, but normally that should never happen.
TRAJ values are the maximum allowed by any joint/axis, but the separate joint/axis limits should be respected at all times.
That was an issue quite a while back, but normally that should never happen.
TRAJ values are the maximum allowed by any joint/axis, but the separate joint/axis limits should be respected at all times.
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24 May 2024 07:36 #301293
by pavel7890
Replied by pavel7890 on topic Different acceleration across joints
Some details:
LinuxCNC Version 2.9.2
Rexroth Servos via EtherCat SoE, 1ms servocycle, command position + position feedback
LinuxCNC Version 2.9.2
Rexroth Servos via EtherCat SoE, 1ms servocycle, command position + position feedback
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