All,
We have run into an issue with the tool path and G code that fusion 360 is creating for a job. I am using 3D adaptive clearing to clear a pocket ready for finishing. The tool path is fins when spiraling out, however when it starts its final path of roughing to diameter, instead of being a true circle it leaves lots of flats… Like a poorly rendered circle. The machine (HAAS TM1) also judders while this is happening resulting in tool load spiking and sometimes stalling the spindle.
I have attached a picture to try to clarify the problem. Also a link to the Fusion 360 post with more images.
https://forums.autodesk.com/t5/fusion-360-computer-aided/cam-toolpath-issue/m-p/7779674
Does anyone have any idea on how to fix this?
Thanks in advance!
The 3D adaptive is for roughing so it does leave a rough not round finish, you should instead leave like .01 on stalk to leave and chose a finishing option like a 2d pocketing to get a good result.
Yes, understood that it’s a roughing operation and I have left material on for the final finishing op. But just am unhappy with why its not machining the circle tool paths smoothly? The spirals are fine which is the annoying thing!
How much are you leaving for your finish pass? And when you measure the part is this cam value reflected in the measurement of the actual part?
Is the pocket / hole out of round badly?
Are you using the same tool to rough and finish?
How old is this Haas ?
Stock to leave is set at 3mm. Yes sizes match what was put in.
\the diameter of the bore is around 300mm and the flats it is leaving are roughly 8mm wide.The real issue is the loading spikes on the tool as as the machine is also juddering as this happens.
yes. same tool used to rough and finish.
our haas tm1 is about 10 years old ‘I think’.
Just to verify… you are leaving 3mm for the finish?? that’s .118…
Guestimating the depth around 50mm?
If you are leaving 3mm finish at that depth, that is most likely a big part of the problem.
Did you mean .3 mm ?
What is the smoothing and tolerances set to
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Hi,
Smoothing was left to default setting. But after looking around online a suggestion of setting the tolerance to 0.001mm and a smoothing tol. of 0.01mm seems to have helped. Fusion does not like it but will still allow you to run it.
This info in this link has also helped with the jerky movements. https://en.industryarena.com/forum/jerky-contour-toolpaths--216588.html
https://forums.autodesk.com/t5/fusion-360-computer-aided/cam-toolpath-issue/m-p/7779674