Quick question, how do I center the project around work origin?

NomadicVoxel · May 23, 2021, 5:36pm

I’m having a dumb moment. I’m trying to switch to LightBurn (and use Snapmaker Luban now, and I love it so far but can’t figure out one thing: How do I center the project around the work origin?
Is this what LB calls “user origin”? I tried that too but it puts the image to the northeast. I did see the nine dots to select where it relates to the image and picked center but it still was far off.

Is there something I’m missing? Should I show screenshots?

bernd.dk · May 23, 2021, 9:01pm

github.com

LightBurnSoftware/Documentation/blob/master/CoordinatesOrigin.md

[Return to main page](README.md)

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# Coordinates and Job Origin

There are a couple different ways to tell LightBurn how to cut the project within the work area of your machine.  You choose them in the "Start From" box on the Laser tab:

![Start From](./img/CoordinatesStartFrom.png)

## Absolute Coordinates

**Absolute Coordinates** is the simplest - The page grid you see in the main editing window represents your machine's work area.  Anything you place in that area will be cut in the corresponding place on your machine.  Users with small lasers like the K40 will likely find this the simplest and most intuitive option.

In the image below, the two circles placed in the middle of the work area will be cut in the middle of the machine work area.  The green square in the lower-left of the image represents the Job Origin, and the red square in the same place shows the Machine Origin.  In "Absolute Coordinates" these are always in the same place.

![Coordinates Absolute Position](./img/CoordinatesAbsolute.png)

## Current Position

This file has been truncated. show original

try looking in documents, at the top of this page, this link leads you to LightBurn’s fine documentation with lots of good stuff, also links to videos that deal with everything from first time use to features for the semi professional user, really nicely made!

NomadicVoxel · May 23, 2021, 9:14pm

Thanks for linking to the reading material. I think I missed something first pass, but that helped, thanks

NomadicVoxel · May 23, 2021, 10:37pm

I think I’m still not understanding something. Setting it for “Start from: User origin; Job origin: center;” should work, right?
I haven’t run a print from Lightburn yet, but when I test by loading the project and have the machine “run perimeter”, it draws a rectangle with the bottom-left corner a little ways to the right of the selected origin.

Am I doing it wrong or does this sound like a compatibility bug?
The perimeter test looks something like this.

Nevermind. Someone from Snapmaker’s forum says it’s a bug with the machine’s custom firmware. Apparently the software for drawing works fine, but the software for the perimeter preview doesn’t know what relative coordinates are, weird…

bernd.dk · May 24, 2021, 4:31am

Nice that there is a logical explanation, then you can act on it. Hope you enjoy LightBurn and this forum here too.

system · June 23, 2021, 4:31am

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