Mm/min or mm/sec

[kamvic (lance davies)]

I have a diode laser. The suggested speed unit in the settings call for mm/min.
Works great for me. I can now after using this mm/min for some time now,
dial in the speeds perfect for any material I engrave or cut.
Problem now (better yet-- peeve) is when I want to use the material test
grid in the “Laser Tool” option, the Edit Material Setting in the Material test
Setup only allows to input the speeds in mm/sec. Can the units be manually
selected to change from mm/sec(CO2 lasers) to mm/min(for diode lasers)?
Thanks for any reply to my rant.
Cheers

[jkwilborn (Jack Wilborn)]

I think the materials test is a relatively new addition to Lightburn and it’s currently using the basic unit that the software uses, which is mm/s. I’m sure it’ll be upgraded when they get to it.

You know how to convert? Do that in the interim or use this site.

https://www.o2creative.co.nz/laser/lightburn_basic_generator.php

Good luck

:

[JohnJohn (John Johnson)]

@kamvic

Problem now (better yet-- peeve) is when I want to use the material test
grid in the “Laser Tool” option, the Edit Material Setting in the Material test
Setup only allows to input the speeds in mm/sec.

I’m not seeing what you’re seeing. I ran a quick test with units in mm/min.

Then I saved the G-code, and opened it in an editor.

The F is for Feed Rate and that number 300 is mm/min.

I’d love to find a bug and report it but it’s not happening here.
Are you willing to verify/confirm?

I find this reference helpful:

Grbl V1.1 Quick Reference

[LightBurn (Oz)]

The material test didn’t have proper support for units, but that’s been fixed, and will be in the next release. I honestly thought that was included in 1.1.04, but it doesn’t appear to be.

John Johnson is using a beta version of 1.1.04, so he’s seeing the fix, but you won’t have it unfortunately.