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My laser does not cut perpendicular ( Problem URGENT ! )

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Laser
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2023-03-03

I need urgent help, the laser is not cutting perpendicular and when the laser goes to the origin it does not reach the same distance on the right and left sides.
We have disarmed and reassembled the laser. We have verified the tensions of the belts on both sides to see if that is the problem, and we do not know what it could be.
We need someone to help us with a solution if it is what we should do with the laser or if it is something to configure on lightburn.
Please, it is urgent, our work is stopped because of this.
Thanks in advance and I look forward to all your responses.

I put 2 photos about the problem to see if it is better understood and you can see the distance with the millimeter rule of difference on the right side.
C

    • Miller

      2023-03-04
      After some additional thought, as long as the gantry is square to the Y-axis, you should be able to engrave perfect squares. A quick test you can do…

Get a BIG piece of cardboard (to cover most of your engraving work area), then engrave a square on it. Use a modest speed to ensure you don’t have skipped steps from your stepper motors.

Measure the two diagonals of that square. They should be exactly equal.

If the diagonals are not exactly equal, you need to adjust the gantry so that it is perpendicular to the Y-axis. Assuming that you have two Y-Axis belts, you can slightly shift the position of one belt so that the gantry ends up square to the Y-Axis. Alternatively, if the drive gears that engage the belts are not secured to a “flat” on the drive shaft, you may be able to loosen one of the grub screws and rotate the gear very slightly so that the gantry becomes square to the Y-Axis.
Repeat the square engraving test and verify that the gantry is now squared.
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