Hi, I’m having an issue where Lightburn sets my G0 feedrate to 0 during travel moves. ; LightBurn 1.2.01 ; Marlin device profile, current position ; Bounds: X0 Y0 to X90.91 Y78.99 ;USER START SCRIPT G21 M203 X100 Y100 ; units mm ; set max feedrate 100mm/s ;USER START SCRIPT G21 G91 ; Cut @ 4 mm/s…

The ‘Fast Whitespace’ setting will be used for the G0 Rate in LightBurn. This may be worth review: [image] Laser Jog Settings LightBurn Software Questions I’m trying to figure out where the jog settings are for lightburn. I have a Snapmaker 2.0 and I see the speed setting…

Ok since there is no obvious fix for this issue, I wrote a quick and dirty Python postprocessor: # ------------------------------------------------------------------------------ # Fix Lightburn Gcode Post # # Authors: Markos Date: 2022-12-08 # # -----------------------------------------------…

Thanks for the code. I think they don’t much care about us Marlin folks since the Marlin mode does not generate G code that matches what is specified at: Linear Move | Marlin Firmware

Just signed up to the forum to ask about this and your post was top of the list in the Marlin section. Thanks for the script.

Alright np. It’s a shame this doesn’t have an official fix yet. I will update the script soon to make it less awful - I really just threw this script together and it’s a bit of an abomination but it does work lol

This is intriguing. I’ve asked the team internally. I suspect F0 is used as a shorthand to point at the maximum speed for traverse moves from where it appears in the Config file. I dug for a little bit on the Marlin Git but I struck out. Which Marlin Build number are you running? Is it a specif…

Hi JohnJohn, In response to your previous comment, my MPCNC is running Marlin 2.0.7.2, but it is a V1 Engineering custom configuration. Thank you for linking ReaHe ’s question about the Laser Jog Settings ! This did the trick for me! It is very unintuitive, however, that lightburn uses the “Fast Wh…

[image] JohnJohn: The ‘Fast Whitespace’ setting will be used for the G0 Rate in LightBurn. Not that it’s directly relevant for this Topic but I suspect this is a Marlin only thing. Can you confirm this doesn’t do this for GRBL machines?

Yes, this is a very specific quirk for Marlin. I’m still attempting to tease the naming and the reasoning for it out of the Marlin spec.

[image] JohnJohn: the reasoning for it out of the Marlin spec IIRC, Marlin is unique among G-Code interpreters, because it uses the same feedrate for G0 as G1 and implements them identically. Other CNC implementations define G0 to move as fast as possible without regard to the feedrate used …

Can confirm this is how Marlin works. Feedrates change a lot in 3D printing. Slicers recognise lots of different extrusion moves and you can generally customise the feedrate for all of them. (e.g. inner walls, outer walls, infill, bridges, tops and bottoms of things.) Features like retraction/reve…

Lightburn Setting G0 Feedrate to 0

LightBurn Hardware Compatibility Marlin

JohnJohn (John Johnson) December 19, 2022, 11:26am 7

The ‘Fast Whitespace’ setting will be used for the G0 Rate in LightBurn.

This may be worth review: