Center of fill is offset

I think this is going in the right section.
I have a FoxAlien with the upgraded 20 watt diode module, purchased with leg upgrades and built a table for it and built a filter vacuum box. This issue was there when i first powered it up, but sort of comes and goes a little bit and loading up an old file appears to be really bad all of a sudden. I am burning shipping boxes at 100mm/s and 40% power. I know I can burn faster than this, thats a different problem for another thread.
I found two other threads that have the same issue I do, one without resolution and the other apparently was a different problem.

As stated in the one thread, the problem is not the offset tool- I don’t have it setup and the edges are fine. The problem is only in the middle.
Does anyone have any new ideas? From testing I can get it to burn properly when I single direction raster, but that takes twice as long to burn and makes my current usage so inefficient that I would honestly rather go back to plain boxes than keep burning them.

It will help a lot if you post and example of your settings, project and results.

Post your lightburn file so we can look at what you are seeing .

here’s a pic. Same issue shown as the linked threads.

Still looking for help if anyone has seen this before

Tightening the x belt was suggested on the Facebook group. It helped slightly but was a minimal change compared to the over all problem.

Sorry to step in.
If you run your job at 0 scan angle and Disable Bi-directional fill, do you get the same results?
If you use Offset fill?

image

one direction fill does eliminate the problem. I found that early on, and it worked for a friend on his laser machine too. doubling my piece time though is not going to work out, even in the short term. All I can do right now is shipping boxes where a little wonky in the middle doesnt matter too much.
I would like to get this fixed though so i can actually use the laser. I have wood projects planned and would like to get started.

Tightened the s*** out of the x belt. I don’t have a crank or knob on it, but stretched it as hard as I could with my fingers before tightening it down. Appears to have helped.
Weirdly, I also upp my acceleration max from 500 to 1000 and that also seems to have helped. I’m not sure why, but I do appreciate how much faster stuff gets done now and looks “fine”

Still no ideas? Anyone?

Look into scan offset adjustment.

I have already explained and shown that this is not the problem.

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