Hello
really new to lasering thing. I bought a sculfun S9 and I’m currently using Lightburn. I designed a map and for the material I’m using i need 4 passes at 100%, 420 speed. I tried different optimization setting but for this specific cut you can see when the laser comes for the second pass it is misaligned.
Also you can see i designed on adobe this compass rose but the laser completly wrecked this. i don’t really know what I’m doing wrong.
I have just received my A9 and had a similar issue. After checking the belt is appeared that one of the screws which connect the belt holder to the laser was not tight. This resulted in some movement between belt and laser.
After tighting this screw the problem was solved.
In my limited experience with machines built like your sculpfun, the belts and rollers need to be tighter than you would initially think. This is especially true for line work at engraving speeds…such as you’re showing above.
If any roller will turn without notable resistance with the gantry or laser immobilized, it needs tightened until there is enough resistance to move the axis by simply twisting the roller. Without mechanical tensioners, the belts should be about as tight as you can pull them with bare fingers.
The laser itself also needs to be firmly secured to the carriage. I believe some Sculpfun machines still use a “pendulum” mounting setup that is (IMO) TERRIBLE for rapid motion. The mass of the laser hanging on that long thin bracket resists changing direction and wobbles. If so, move both the laser and the workpiece up, up, up.