Kinematics for 4th Axis?
- CNC_ANDI
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08 Dec 2023 13:18 #287529
by CNC_ANDI
Kinematics for 4th Axis? was created by CNC_ANDI
Hello,
can i install kinematics for a only 4th axis machine too?My 4th axis works really well, but it's annoying to have to mill off all the edges first to define an exact center point for the rotation axis.
With the kinematics you could simply clamp the part on the 4th axis in the vice and simply set a corner as the zero point. If the workpiece is now rotated 180 degrees, should the zero point move with it or not?
can i install kinematics for a only 4th axis machine too?My 4th axis works really well, but it's annoying to have to mill off all the edges first to define an exact center point for the rotation axis.
With the kinematics you could simply clamp the part on the 4th axis in the vice and simply set a corner as the zero point. If the workpiece is now rotated 180 degrees, should the zero point move with it or not?
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- Aciera
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08 Dec 2023 16:27 #287546
by Aciera
Replied by Aciera on topic Kinematics for 4th Axis?
Couldn't you use a 3d probe to setup a work offset in the center of rotation of your rotary axis before clamping the work piece? Then you could setup all the required work offsets in relation to the center of rotation.
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09 Dec 2023 11:25 #287641
by CNC_ANDI
Replied by CNC_ANDI on topic Kinematics for 4th Axis?
Yes i do it like that this time.
But with kinematics it is much easier....
But with kinematics it is much easier....
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09 Dec 2023 11:47 #287645
by Aciera
Replied by Aciera on topic Kinematics for 4th Axis?
Maybe I misunderstand what you mean by 'kinematics' but would the kinematic not also require to know where the rotational axis is in relation to the machine reference point?
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09 Dec 2023 12:01 - 09 Dec 2023 13:40 #287646
by CNC_ANDI
Replied by CNC_ANDI on topic Kinematics for 4th Axis?
yes for sure. but my question is how i can install the kinematics (TCP Mode)..
and did it work with only 4th axis.
and did it work with only 4th axis.
Last edit: 09 Dec 2023 13:40 by CNC_ANDI.
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09 Dec 2023 15:33 #287676
by Aciera
Replied by Aciera on topic Kinematics for 4th Axis?
Ah ok, yes, TCP kinematics also works for a single rotary axis.
You may want to have a look at '/sim/axis/vismach/5axis/dual-table-rotary' for an XYZAB setup. For your setup you could just permanently set the B joint position to zero.
You may want to have a look at '/sim/axis/vismach/5axis/dual-table-rotary' for an XYZAB setup. For your setup you could just permanently set the B joint position to zero.
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09 Dec 2023 15:55 #287680
by Aciera
Replied by Aciera on topic Kinematics for 4th Axis?
As for the question of the 'zero point' moving
In TCP mode the point rotates with the part in Trivial mode it will not. To have the point rotate with the part but remain oriented on the machine axes would require custom code to translate the coordinates according to the rotation.
I'm not sure but 'Dynamic work offsets' or 'Dynamic Fixture offsets' may be of interest.
In TCP mode the point rotates with the part in Trivial mode it will not. To have the point rotate with the part but remain oriented on the machine axes would require custom code to translate the coordinates according to the rotation.
I'm not sure but 'Dynamic work offsets' or 'Dynamic Fixture offsets' may be of interest.
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