topic Re: Mill wants to go trough the workpiece on its way from zero point to start po in Fusion Manufacture Forum

Mill wants to go trough the workpiece on its way from zero point to start point.

mp28pa — Mon, 26 Jun 2017 12:44:53 GMT

Hello

I am using a hobby cnc called "3018". It uses grbl. When i click start in the grbl controller, the mill goes down, through the workpiece and then up to the starting point. It should be the other way around. I tested it with a non fusion 360 made file and i dont have that issue, so fusion 360 has to be the issue.

Do you have any ideas?

Re: Mill wants to go trough the workpiece on its way from zero point to start po

LibertyMachine — Mon, 26 Jun 2017 12:52:30 GMT

Are you using the grbl post processor?

Could you attach your g-code (not copy/paste, but actually attach the code? If it has a file extension other than .nc or .txt, you will have to rename it to either of those file types

Re: Mill wants to go trough the workpiece on its way from zero point to start po

mp28pa — Mon, 26 Jun 2017 13:01:06 GMT

I am using the generic grbl processor

Re: Mill wants to go trough the workpiece on its way from zero point to start po

LibertyMachine — Mon, 26 Jun 2017 13:09:10 GMT

Does your machine have limit or homing switches? How and where are they set? The first move is a G28 G91 Z0 which is a return to the Z home position, which is typically it's tallest Z height

Re: Mill wants to go trough the workpiece on its way from zero point to start po

mp28pa — Mon, 26 Jun 2017 13:20:27 GMT

There are no homing switches

Re: Mill wants to go trough the workpiece on its way from zero point to start po

LibertyMachine — Mon, 26 Jun 2017 13:21:43 GMT

Than that's the problem. Remove the G28 G91 Z0 line from the program and run it slowly to observe the behavior