Divice speed in lightburn

I have a Ortur laser. I updated the program and now I can’t set the speed. If I set it for 20 or 200 the speed does not change. I have the setting on mm/sec. Need help.

Are you positive that you’re in mm/sec?

What are you trying to engrave when you are changing the speed? Is it just simple fills or lines, or photographic? What other settings are you using?

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