In my self built machine I have the limits in the bottom left corner. The only way I can get a job to run is if I have it in ‘Current position’ mode, everything else just alarms as out of limits not matter how I try to change machine or user defined axis in grbl or Lightburn.
When I examine the gcode Lightburn is sending to the machine, it comments as “Bounds: X0 Y0 to X60 Y60”…Where are these numbers coming from?, as they are nothing like the size I have set up and would cause the issue!
Seems to me this is the likely issue. You’re in negative coordinates after homing. This is why you’re not able to use Absolute Coords correctly.
What is the source of the GRBL version that you have? What board are you running?
Based on the version number this looks like it might be from laserGRBL “v1.1h, custom, XY Homing 20190830” which should be set to zero origin after homing. If so, that doesn’t seem to be happening. But please confirm.
The gcode itself looks fine so don’t think that’s the issue at play.
My gut feel was that I should be able to get it to default to 0,0,0 on the limits, but this my first time playing with a grbl controller and I can’t any suitable command.
Flashed it with 1.1 grbl from the github thingy.
That will be an Arduino based board that will make it easy.
I’d suggest installing the firmware marked “v1.1h, custom, XY Homing 20190830” from laserGRBL. Easiest way is to do it directly from laserGRBL but up to you how you apply it. It will auto-zero origin after homing.
