I don’t see a fundamental configuration issue or an issue with the generated g-code so the problem lies somewhere either at the controller or laser module.
If you’re not experiencing this with the old module then it’s likely a hardware issue with the new module.
Initially I thought you might be getting power drop-out at low speed or power but that doesn’t seem the be the issue in this case.
What material are you cutting in that photo? It look like MDF or chipboard or something similar. Can’t quite tell. If it’s something with a grain then perhaps rotating it to see if the problem moves to the vertical cut.
The picture is a thin cardboard. I tried to turn it, had the same intention.
Saw the same dotted line with wood but didn’t saw the problem at this point.
I thought about a hardware issue but I don’t get it why the head works good on the x-Axis but not ok the y-Axis. The laser should not care about the direction the motor moves!? So it must be something with the controller?
Maybe I can switch the cables of the motors to see how the cut behaves.
I have one of these animals… Works well … I run it off a 12V/4A supply that only feeds the laser, but it appears that it could easily support the addition of the small ‘blue pill’ controller… I don’t think it’s a power/current issue.
3A for the laser module + ~1.5A for the board and steppers brings overall draw to around 4.5A so should be below the 5A rating of the power supply. However, it’s unclear if the power supply is performing to rating. If the adapter is available than a relatively easy test to take power supply out of the equation.
Besides, I don’t have an alternative better hypothesis for what might be going on.