Empty GCode with Images

[Yvan (Yvan Rodrigues)]

Hi I’m a brand new user. Hopefully this is a dumb question.
I have been successful at importing an SVG, creating GCode, and burning.

When I import an image such as a greyscale bitmap PNG, I assign it a cut (colour?) number C01, then setup C01 with speed, power, and dithering options; but when I generate GCode all I get is

; LightBurn 0.9.18
; Marlin device profile, absolute coords
; Bounds: X13.96 Y10.25 to X175.9 Y217.81

G21
G90
M9
M05
G90
; return to user-defined finish pos
G0 X0 Y0 F0
M2

This is my main screen

and this is the cut configuration

(I have tried other image modes).

My laser is not “connected” to LightBurn; I’m creating GCode and dropping it into OctoPrint at the moment; so most of the controls don’t apply.

Thanks in advance.

[LightBurn (Oz)]

Move the file slightly off the side of the workspace. Most likely the image is being removed because it is crossing the page boundary.

[Yvan (Yvan Rodrigues)]

OH! I am getting a warning to that effect by I understood it to mean that the image would be cropped/truncated, not completely omitted.

THANK YOU!

Is there a way to change that behaviour?

[LightBurn (Oz)]

We don’t crop or truncate, but there’s a setting (on by default) to discard shapes that are out of bounds because they would normally crash the machine. If you’re certain that won’t happen you can disable the setting here, in Settings > File Settings:

[Yvan (Yvan Rodrigues)]

I see. Yes my machine is more than 2m x 1m, so I never print at its origin. Thanks!

[LightBurn (Oz)]

You’re possibly better off using ‘Current Position’ then, as the GCode it emits will be entirely relative moves. Read here: https://lightburnsoftware.github.io/NewDocs/CoordinatesOrigin.html

[Yvan (Yvan Rodrigues)]

I always do a G92 X0 Y0 Z0 before I hit START, so absolute positioning has never been an issue.