Home/origin setup on Shapeoko XL

gavincarrie · October 19, 2019, 2:11am

I’ve got a Shapeoko XL and am using Lightburn on MacOS. I’m having trouble getting the machine to “know” where it is. I’ve got the origin setup as bottom (front) left in device settings. The machine homes to the back right. The problem is that when I home the machine (back right) and “Get Position” and then ask it to “Show Last Position”, the crosshairs show up at the origin, which is in the front left. So if I jog the gantry anywhere from home onto the workspace grid, the “show last position” crosshairs show up off of the workspace grid to the lower left. I’ve played with all the settings I can see and watched the tutorial on home and origin, but seem to be missing something.

JTech photonics has a tutorial on how to set a laser up on the Shapeoko along with setting up macros, but even that hasn’t fixed my issue. Thanks for any help out there!

Bonjour · October 19, 2019, 3:08am

What controller/firmware are you running?

Have you read this?

github.com

LightBurnSoftware/Documentation/blob/master/CommonGrblSetups.md

[Return to main page](README.md)

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# Common Grbl setups

If you have a GCode-based system, like a Shapeoko, Eleksmaker,  X-Carve, or Acro system, you might need to make some simple changes to get the most from LightBurn.

#### Short version:

- You might need to adjust your spindle max RPM value ($30) to match the LightBurn default (1000) or vice versa.  The value in LightBurn is called "S-Value Max", in the [Device Settings](DeviceSettings.md#s-value-max).
- You might need to enable "Laser Mode" if you have GRBL 1.1f or later (\$32=1).
- If your machine uses negative workspace coordinates you'll need to apply a workspace offset (G10 L2 P1 xx yy) and set your machine status reporting to be relative to the workspace origin, not the machine origin (\$10=0).



#### Grbl Flavors

Grbl firmware was originally designed for CNC machines and 3D printers, with laser support added more recently.  It is highly configurable, and this is both a blessing and a curse. The "standard" way a CNC machine is configured is somewhat different than the way laser machines often are.  Luckily this is easy to change, and easy to switch from one to the other.

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Or watched this?

gavincarrie · October 19, 2019, 6:28am

I went through that video and set things up accordingly. Things are working pretty well: machine and job origins seem ok as well as the X & Y positions, but if I select the tool that moves the laser to the position that I click, the machine thinks I’ve clicked somewhere on the lower left from 0,0 and the CNC tries to go there each time.

Bonjour · October 19, 2019, 8:12am

I’m afraid I haven’t got a machine with me to try and replicate.

Someone else will no doubt be along to advise you.

Good on you getting it so far, though. You’re nearly there.

LightBurn · October 20, 2019, 9:42pm

What is $10 set to on your machine? It should be 0, so the machine reports position in workspace coordinates, not absolute machine coordinates.

gavincarrie · October 25, 2019, 5:19am

$10 was set to 255. That seems to have fixed it! Thanks so much!

system · November 24, 2019, 5:19am

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