I was about to cutout some parts in aluminum. I homed the machine, then did a probe. I set the 1/4 in. bit for a max of .0625 in. pass depth and 20% chip load. When I ran the job the bit plunged into the materiel about .125 inches or more and then stalled. I checked all the parameters and tried running the job several times but with similar results. Can anyone suggest a solution to this issue.
Sounds like a work coordinate problem. Do you have homing on? If you do, home the machine first, then set your WCS, then try agin.
Did you probe off the bed? If so, have you got the correct material thickness in the set up page? What do you mean 20% chip load?
Where is your origin for the setup in Fusion360? Top of material or bottom of material? Post the files if you don't know what I am asking.
Here are the first few lines of the gcode for the job - I can see no problem with them especially the first Z axis coordinate where the cut starts: T1 G17 G20 G90 G0Z0.2600 G0X0.0000Y0.0000 M3S10000 G4 P1.8 G0X7.6533Y3.3194Z0.2500 G1Z0.0000F10.0 G1X7.6444Y3.5161Z-0.0572 G1X7.6356Y3.7128F15.0 G1X7.6267Y3.9095 G1X7.6178Y4.1062 G1X7.6090Y4.3029 G1X7.6001Y4.4996 G1X7.5913Y4.6963 G1X7.5824Y4.8930 G1X7.4481Y7.8754 G1X7.4286Y8.3076 G1X7.4272Y8.3500 G1X7.4269Y8.3749 G1X7.4267Y8.3927 G2X9.2817Y10.2469I1.8550J-0.0008 G2X11.1367Y8.3927I0.0000J-1.8550 G1X11.1362Y8.3500 G1X11.1348Y8.3076 G1X11.1171Y7.9153 G1X11.0946Y7.4158 G1X10.9101Y3.3194 G1X10.9077Y3.2779 G1X10.9045Y3.2377 G1X10.9002Y3.1977 G1X10.8950Y3.1581
Turns out the piece of aluminum plate that I was using had a slight bow in it - enough to cause the problem. I set Z-zero at the high spot and managed to manufacture my piece. Thanks for the assistance
This is not Gcode form the OB postprocessor, the default Fusion post for GRBL is a bit broken, that is why we created our own. How to install it. The only real requirement is that Z is homed to Z+ limit. if you have limit switches then always homing after machine start is enough, otherwise you need to fake the home
