Wood lathe using joints for tools
- RLA
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17 Mar 2026 19:25 #344426
by RLA
Wood lathe using joints for tools was created by RLA
Hi...Have a diy cnc Wood lathe...have rough/finishing tools mirrored on part doing frequent arcs.....so one axis,2 tools..was hoping to put them on same side with 1" between them...in order to cut the same path finish tool would have to be delayed, then follow on toolpath..is this possible with joints?..
Also would need to use a different diameter offset for finish tool as it will need sharpening more often than rough...possible?
Thanks for any help,
Rick
Also would need to use a different diameter offset for finish tool as it will need sharpening more often than rough...possible?
Thanks for any help,
Rick
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- andypugh
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24 Mar 2026 12:54 #344672
by andypugh
Replied by andypugh on topic Wood lathe using joints for tools
LinuxCNC can only run one toolpath at a time, so to do what you want you might have to get creative.
You could certainly give the two tools a different Z-offset in the tool table, so the two passes could be using the same workspace coordinates. If you have only one physical Z axis, though, that won't really help, as LinuxCNC can only apply one tool offset at a time.
A kludge might be to use X for tool1 and Y for tool2. (unfortunately, no diameter mode in the Y axis)
You would need to split the paths, with a simple XZ move for the start of roughing, then a combined XYZ until Tool1 is finished, then switch to ZY moves.
I don't think you can do arcs this way.
Even with an XZ/UW setup, ie with a separate W axis, I don't think you can do _simultaneous_ XZ and UW arcs. This is mainly a limitation in G-code, as there is no way to define an alternate arc centre.
You could certainly give the two tools a different Z-offset in the tool table, so the two passes could be using the same workspace coordinates. If you have only one physical Z axis, though, that won't really help, as LinuxCNC can only apply one tool offset at a time.
A kludge might be to use X for tool1 and Y for tool2. (unfortunately, no diameter mode in the Y axis)
You would need to split the paths, with a simple XZ move for the start of roughing, then a combined XYZ until Tool1 is finished, then switch to ZY moves.
I don't think you can do arcs this way.
Even with an XZ/UW setup, ie with a separate W axis, I don't think you can do _simultaneous_ XZ and UW arcs. This is mainly a limitation in G-code, as there is no way to define an alternate arc centre.
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