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.
Is the machine falling off the table? Or how did you discover that problem right during this production?
Can you cut a 100x100 in the middle of your machine bed, and measure if it holds the 100mm and 90 degrees?
I remember that my diode laser was not 100% parallel either, but I could adjust my endstops to close a little earlier and the problem was thereby minimized.
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 doā¦
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 donāt 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 āflatā 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.
This will be a tedious trial and error process.
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If everything is tight, it appears likely that the machine frame is slightly out-of-square. One approach to fixing this is to use shims at the connections between the horizontal and vertical members of the machine frame.
If the machine frame is square, but you are still seeing this effect, then the gantry is probably slightly misaligned. Fixing that can require some careful adjustments of the belts, beyond just proper tensioning.
You have two belts driving the Y axis. Regrettably there are two ways to reassemble the engraver to create off-square work.
Confirm that the box-frame is square before proceeding before squaring up the Gantry.
Move the gantry away from the corner you wish to check and apply your square to the inside corners of the frame. If this is square you can proceed to square up the gantry.
With the engraver powered and resting in the home position, loosen the grub screw on the Y axis motor that is furthest from the home switch (if equipped) or angled furthest away from square. The motors have āhold currentā so they should remain fixed but not rock-solid.
With the screw loose the engraver may rebound toward square slightly. If the grub screw that locates the belt drive pully is on a round motor shaft you can pull the gantry back to square and retighten the screw. If there is a flat spot for the grub screw on the motor shaft you may need to retighten it and move the belt to get your final alignment.
