Help please with settings GRBL

[berainlb (PY)]

@gareth2019

output power 700w(7w)

I’ll assume you meant 7000mW(7W). If not, correct me as the guidance will be different. If this is truly a 7W output you should easily be seeing markings on cardboard at 90% power at even 3000 mm/min.

Try running a powerscale test:

Laser parameter grayscale matrix

Here is a LightBurn file I created that provides a vector based ‘Power Scale’ example for testing cuts on different materials. PowerScale Test_01_Rico.lbrn (23.7 KB)

Can you send a photo of the result?