How to jog when beyond soft limits
- kubes
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12 Jun 2025 20:08 #330229
by kubes
How to jog when beyond soft limits was created by kubes
I have soft limits on my axis and absolute encoders. If I power off the machine when I am on the limit (max or min), the machine may move by a 10th (0.0001) or so, once the servos release on power off. This will cause the machine to "move beyond" the soft limit, even if just 0.0001. Once this occurs, I can't jog the axis at all. I have to edit the limits in the ini, jog and reset the limits back.
I would expect you can jog toward the soft limit and beyond to get back into the limits. How can I jog into the limits is I am just slightly over (but over)
I would expect you can jog toward the soft limit and beyond to get back into the limits. How can I jog into the limits is I am just slightly over (but over)
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12 Jun 2025 21:09 #330230
by tommylight
Replied by tommylight on topic How to jog when beyond soft limits
What GUI?
Does the machine have tandem axis/joints?
Does the machine have tandem axis/joints?
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12 Jun 2025 21:38 #330232
by kubes
Replied by kubes on topic How to jog when beyond soft limits
Probe Basic
Not sure what you mean by tandem axis/joint. It's a mill so three axis, defined with axis_ and joint_
To that point, the issue is both before home and after, so joint and axis.
Not sure what you mean by tandem axis/joint. It's a mill so three axis, defined with axis_ and joint_
To that point, the issue is both before home and after, so joint and axis.
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18 Jun 2025 00:19 #330425
by kubes
Replied by kubes on topic How to jog when beyond soft limits
I have soft limits on my axis and absolute encoders (always homed, and to limit or homing switches). If I power off the machine when I am on the limit (max or min), the machine may move by a few10th (0.0001) or so, once the servos release on power off. This will cause the machine to "move beyond" the soft limit, even if just 0.0001. Once this occurs, I can't jog the axis at all. I have to edit the limits in the ini, jog and reset the limits back.
I would expect you can jog toward the soft limit and beyond to get back into the limits. How can I jog into the limits is I am just slightly over (but over)
I see in WCS, there are limits override, but maybe it only works with hard limits and limit switches?
I would expect you can jog toward the soft limit and beyond to get back into the limits. How can I jog into the limits is I am just slightly over (but over)
I see in WCS, there are limits override, but maybe it only works with hard limits and limit switches?
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18 Jun 2025 00:44 #330429
by tommylight
Replied by tommylight on topic How to jog when beyond soft limits
Don't, just do not double post, it will not help you and will make a mess for us trying to keep stuff clean here.
Much better to post more info about your machine and how the homing is set up, and uploading config files usually helps a lot.
Much better to post more info about your machine and how the homing is set up, and uploading config files usually helps a lot.
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18 Jun 2025 03:38 #330431
by kubes
Replied by kubes on topic How to jog when beyond soft limits
The last comment made is seem like a UI issue and being a week without anyone responsding. I tried to move but I could not figure how to move it.
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18 Jun 2025 11:44 #330445
by kubes
Replied by kubes on topic How to jog when beyond soft limits
I have absolute encoders and thus don’t home. Though through other posts it does not seem that is well supported.
I thought this would be a quick answer. Does Linux cnc not have the ability to jog to get back within soft limits? I would expect the that can’t jog more into the limit but you should be able to jog out of the limit. Is this supported?
I thought this would be a quick answer. Does Linux cnc not have the ability to jog to get back within soft limits? I would expect the that can’t jog more into the limit but you should be able to jog out of the limit. Is this supported?
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18 Jun 2025 12:04 #330446
by tommylight
Replied by tommylight on topic How to jog when beyond soft limits
Much better to post more info about your machine and how the homing is set up, and uploading config files usually helps a lot.
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18 Jun 2025 13:22 - 18 Jun 2025 14:12 #330448
by kubes
Replied by kubes on topic How to jog when beyond soft limits
So you are saying that Linux CNC supports jogging back into soft limits?
config attached
config attached
Last edit: 18 Jun 2025 14:12 by kubes.
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18 Jun 2025 14:50 #330450
by tommylight
Replied by tommylight on topic How to jog when beyond soft limits
Yes, LinuxCNC supports backing off of the limits, be it hard or soft, it has a button for that in the GUI, but :
-you never mention any info about the machine, like it uses EtherCAT
-i have no experience with EtherCAT, so no idea if normal LinuxCNC stuff applies to it
-you keep asking for help, but still fail to provide info, this is frankly agonizing
-you posted twice in the wrong sections, there is EtherCAT section on this forum, but this is not important as we do not mind moving topics around, and i did this once, now i have to do this again as you did not provide the info on the first post, nor the second nor....
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In general, limits should never be crossed if everything is set up properly, and that is easy to achieve, but this is EtherCAT, so i am moving this there, much more experienced users there so should figure where the issues is.
I would venture a guess at setting some small HOME_OFFSET in the ini file, like a mm or two, so even when you disable motors they could not reach limits. Maybe this is all you need...
-you never mention any info about the machine, like it uses EtherCAT
-i have no experience with EtherCAT, so no idea if normal LinuxCNC stuff applies to it
-you keep asking for help, but still fail to provide info, this is frankly agonizing
-you posted twice in the wrong sections, there is EtherCAT section on this forum, but this is not important as we do not mind moving topics around, and i did this once, now i have to do this again as you did not provide the info on the first post, nor the second nor....
-
In general, limits should never be crossed if everything is set up properly, and that is easy to achieve, but this is EtherCAT, so i am moving this there, much more experienced users there so should figure where the issues is.
I would venture a guess at setting some small HOME_OFFSET in the ini file, like a mm or two, so even when you disable motors they could not reach limits. Maybe this is all you need...
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