Xy axis belt makes grinding noise

I have a Falcon 10 watt laser module for Ender 3 v2 3D printer with Creality control box. After homing successfully when I click on “Frame” in lightburn it makes a grinding noise & wont stop. it only does this with the lightburn software, 3D printing works perfectly. I dont think I changed any settings , How do I calibrate this?

Coordinate system setup.

The 3D printer is a CNC machine, but was never optimized for laser work. That is your job.