hello, can you tell me if it is possible to generate a path with this type of cutter?
I thought of helix but the entrance to the forum is not central.
thank you
Thread Mill
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Re: Thread Mill
Hi and welcome to the forum!
Path workbench does not respect the tool geometry directly, but you can use the helix operation to create a path. It is especially easy if you model the outer diameter of the thread as in the attached example.
In the example I want to create a path for an M16x2 thread:
- I modeled a hole of 16mm
- the tool has a diameter of 8mm, that's what I specified in the tool table
- I selected the inner wall of the hole
- I created a helix path with stepdown=2mm
Please note that the model does not show the thread correctly. If you use the hole feature in PartDesign workbench for an inner thread, then you have to adjust the diameter of the tool
Path workbench does not respect the tool geometry directly, but you can use the helix operation to create a path. It is especially easy if you model the outer diameter of the thread as in the attached example.
In the example I want to create a path for an M16x2 thread:
- I modeled a hole of 16mm
- the tool has a diameter of 8mm, that's what I specified in the tool table
- I selected the inner wall of the hole
- I created a helix path with stepdown=2mm
- Snip macro screenshot-274776.png (4.56 KiB) Viewed 1577 times
- Attachments
-
- threadM16.FCStd
- (15.92 KiB) Downloaded 45 times
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Re: Thread Mill
the only issue with this method is the retract (it's on the edge, so it will be a single use cutter 
)
I guess you'll need some code / macro to generate the thread and retract correctly, or some gcode postprocessing
)I guess you'll need some code / macro to generate the thread and retract correctly, or some gcode postprocessing
Re: Thread Mill
thank you chrisb. I think what he says m0n5t3r is correct, in this way the elix of the tool slams on the edge without entering. I have no idea how to intervene in the gcode 
. However I will give it a try.
. However I will give it a try.Re: Thread Mill
You are right. It would make a good feature request to add a property "retract in center".
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Re: Thread Mill
I have a change that does exactly this - it however depends on the new ToolBit changes. Those are merged but need verification and I didn't want to add an feature that depends on some basics which might get kicked out, or change significantly.
Re: Thread Mill
What should we test?
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Re: Thread Mill
A new approach to Tools, ToolLibraries and ToolControllers:
https://forum.freecadweb.org/viewtopic.php?f=15&t=41026