Hi everybody! I freshly arrived in the CNC world and discover it. I recently acquired a proxxon mf70 mini mill and it's arduino controlled with grbl 1.1 and 3x TB 6600 drivers. Everything seems to work correctly, except moments I don't understand the machine behaviour: Before starting a program, I set my zero on the machine the way I set it up in the CAM software (Fusion 360). When I launch it (with Universal gcode sender) sometimes the program runs without problem and sometimes it goes down on Z axis, then go up, then the program start, but it enters in the stock, I've already broken 2 endmills and I can't explain, this is very stressful So now I test it before, the hand on the electric switch, with the z very high to not collide the stock, but it's not serious in my opinion, I run it approximately, I'm pretty sure I am the problem, I maybe missed something. Could you please help me to see it clear, I don't want to be overstressed when I mill a part. I need theory. Many thanks and please forgive my bad english
In the Fusion360 post options you need to turn off the use of G28 Or you can use the better GRBL post from GitHub - Strooom/GRBL-Post-Processor: Start But for both you need to set the machine up correctly. You must turn on the machine with the Z at the top of travel. Then set part 0,0 using the work offsets. UGS has buttons for this that set the work coordinates to 0 whereever the tool is when you click the button. Read more about coordinate systems here Coordinate Systems
Hi, I set up fusion360 with the GitHub - Strooom/GRBL-Post-Processor you gave me. I suppose that G28 is disabled in it because I've seen nothing about G28 in the PostProc. file. Everything seems OK, but when I generate a code, I have this warning: Invalid Work Coordinate System. Select WCS 1..6 in CAM software. Selecting default WCS1/G54. So I suppose it uns with a default coordinate sytem, but where can I set it up in Fusion ?? I saw the code was generated no matter of the warning. Can I use the code with the default WCS1/G54 ?? Many thanks !!!
G28 was removed from Strooms version because it causes confusion. In Fusion you right click the 'setup' and select Edit, then select the WCS in there somewhere (from memory). Defining Work Coordinate Systems in the Fusion 360 CAM Workspace | Fusion 360 | Autodesk Knowledge Network I also recall NYC CNC doing something different for telling it to automatically repeat a part for several offsets. think it was this one
I think this is the solution. I put in 1 in the WCS Offset and it doesn't give that error. Defining Work Coordinate Systems in the Fusion 360 CAM Workspace | Fusion 360 | Autodesk Knowledge Network
