Help needed! Distorted engraving, possible broken part
I started to test my laser for the first time yesterday. I'm engraving on lasterply. The text i'm trying to engrave is getting distorted: look at the pictures I attached.
It seems like there are certain areas of the work area that are worse. Some letter/lines come out pretty straight while others gets very offset depending on where they are in the work area.
This is what I have tried so far:
* re-adjusting the belts tension. I have done this by following the manual carefully, 5mm gap ect. I have tried this about 10 times now, trying looser and tighter tensions aswell, but I still get the same consistant bad results. I have only managed to make it worse or the same, but never better.
* I have made sure that the surface is totally flat. I've used double sided tape to hold down the laserply material so that it doesn't bulge anywhere. I even tried removing the bottom plate of the emblaser and put it on a flat surface. Didn't help either.
I'm using Cut2D to generate the toolpath, with vector grafics improted from illustrator. I'm using Universal G-code sender, and I've also tried picsender. I'm confident that the essembly was done right, although there were one part with drillholes that was off (one of the side - when putting the sides together the holes were off), so I had to drill my own holes.
Any ideas what could cause this problem? Bad or damaged parts?
Best regards / Fredrik