Dog Bone Corner on tool path being ignored

[nathanhein]

Issue: Dog bone corners exist in the Design. In Manufacture the tool paths indicate it will cut the dog bone corners, but in LinuxCNC and the final product the cnc router never makes the path necessary to make the tool paths. The tool diameter is .125" and the dog bone circle has a diameter of .125" also.

Hardware: Joe's Hybrid CNC running LinuxCNC with Mesa 7176 card. STEPPERONLINE DM542T drivers.

See attached screenshots.

[engineguy · Accepted solution]

@nathanhein 

Unlikely to be a Fusion issue if the toolpath exists in Fusion and simulates correctly, without a file to check then all I can say is look at the tolerances in Fusion, may need to be a little "tighter", meaning more 0s in the setting, example going from 0.01 to say 0.0001.

This will also apply to your LinuxCNC settings, if the settings are too "loose" then Linux will not complete the toolpath.

[engineguy]

@nathanhein 

Apologies, forgot to mention, if you are trying to use a Contour toolpath the a 0.125 tool will not go all the way into the slot, try using either a smaller tool, a wider slot or maybe use the Trace toolpath, that will go in, see example images below 🙂 🙂

Dogbone Contour

Dogbone Trace

[nathanhein]

Bingo on the Tolerances on the Tool path in Fusion. Reduced the default .004" to .001" and all was well.  

Thank you very much!