by spumco » Wed Mar 15, 2017 9:45 pm
In F360 cam, I find it helpful to:
1. Select the operation under Setup and 'edit'
2. Click the 'heights' tab
3. Orient the model so Z is at the top of the screen (looking sideways through the part).
This should put the various heights so you can see them edge-on. Double check your heights starting with the bottom. Choose stock bottom for your bottom height, and stock top for top height. Retract and clearance as you see fit to clear fixtures and so forth. The graphic display makes it easy to visualize what F360 thinks you want.
Set the bottom offset to a NEGATIVE number (-0.05" or something appropriate). For a simple version, do a drilling operation and see the difference when you choose "drill tip through bottom" and add a Z-minus offset.
Also ensure your tool length (edit tool) is correct, (flue length, shank, so forth), because this helps with the simulation.
Finally, make sure to run the simulation once F360 has generated the tool path. You should see the tool cut through the stock however much you've chosen.
If you're still having problems even when the simulation appears good to go, then I suspect the tool is creeping up in the holder as CNCDrive suggested. Or your stock is thicker than you think...