I am getting an odd result from my scan offset test.
Laser: Atezr L2 36 watt diod
Material: Anodized aluminum business card stock
I have setup 5 different speed for my scan offset test. The 100, 300 and 500 speeds seem to show kind of a bolt start and stop to the lines while the 200 and 400 speed seem to fade to a start and end. I do not see anything in my settings that might cause this but I am by no means an expert. The bold start/end to the lines makes it a bit difficult to do the test.
I’d suggest enabling overscanning to help mitigate the underburn at the edges.
It’s possible that your laser is configured on the wrong device profile. Push Devices button in Laser window. Then click on the name of your laser, then Edit. Make sure that “GRBL” is set as the device type, and not any variant. Then complete the wizard.
Thanks for the input.
My laser is configured as GRBL-LPC. To be honest, I am not sure what the difference is between the GRBL and the GRBL-LPC.
For the overscan, is there a specific overscan setting you would suggest? On the few projects I have done since getting my laser it has defaulted to 5%. While I have read what overscanning does I do not fully understand how best to set it.
GRBL-LPC is a specific fork of GRBL to LPC devices. Your machine is not that. GRBL is the correct device type for pretty much all modern GRBL based devices.
The default value is generally a good starting point. It’s based as a percentage so adjusts based on speed.
How overscanning works is that the laser head motion is allowed to extend past the edge of the burn. This allows for more consistent speed during the relevant period that the laser should be on. What’s likely happening with the current underburn areas is that the variable power mitigation that’s present to prevent overburning is not compensating precisely to accommodate the acceleration/deceleration required at the ends of travel. Overscanning will help mitigate this.
In any case, based on the results you’ve shown I don’t think you’ll need any scanning offset adjustment.
