I just got the Ortur laser master 3. And when cutting the left side lines are off but the middle and right are spot on.
How fast are you moving the laser?
That kind of error typically is from a loose connector/bolt or belt AND excessive speeds.
Just because the marketing brochure says the laser can move at 20,000 mm/m does not mean that the machine will give good results at that speed. There is considerable inertia to overcome from the mass of the gantry and laser module.
To help us better understand the variables in play, please show a screenshot of the cuts/layers window and your preview screen.
Also, check for debris on your belt. A small bit of wood on the belt will cause the laser to jolt off line.
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The speed is 300 at 100 power. I adjusted both the x axis belt and both y axis belt. It got a little better.
Belt tension should allow both the x and y axis to slide slowly from side to side when the laser is tilted at a 45 degree angle (power off first!!).
If either slam into the downhill side, then you are too loose. Also check to see if the eccentric nut is holding tension.
