Hi, we got a chinese laser unit 80W at the end of November. Not really sure of the brand since they're barely marked. We had good luck with it up until today when it was powered on, the gantry has a movement problem.
This unit has two speeds for each directly, the "fast" movement and the normal step movement. When you aren't engraving something, and the movement buttons are held down it kicks into fast mode. The unit works fine in all directions in fast mode, but when you press the forward or backward movement button it just vibrates loudly and barely moves or moves with massive resistance. If I power the machine off, I can move the gantry by hand smoothly in all directions. I've cleaned and lubed the linear rails, and checked all the belts and pulleys and everything seems to be solid and tight. I've got no idea what the problem could be.
Any help would be appreciated.
Thank you!
Ron.