Hello everyone…currently having issues with my 80W OMTECH. Had it since 2023, no issues, made some projects in X-mas 2024, no problems at all. Just ruined two projects yesterday…my fill is not aligning with my lines…after the lines are completed and the fill portion of the job begins, some areas match and in other areas the fill starts misaligning vertically. I tried setting the job origin at the center and in this case the fill would beging from the bottom of the job, aligned fine, but would beging to misalign veritcaly upwards/above the lines. I tried setting the job origin to the top/left, and in this case the fill matched at the bottom left of the job but was already misaligned from the bottom right and after. I already tried tightening my x/y belts and did not work. Also, this is not an offset issue. I checked my PWM rising edge valid settings for x/y and they were both false, I will set to true just to see if anything happens. There were some posts from a few years back where folks had the same issue but the posts were closed without resolution. Any help is greatly appreciated! below are two pictures of test cuts on plywood.
It looks to me like you have loose connection on Y axis, Loose set screw or belt tension. I assume your major axis is the X axis - the laser head moves left and right for the large movements, and up and down for the minor movements?
Please post screen shots of your engrave settings and show your preview screen.
If you have checked all the relevant mechanical parts without finding a fault, it could be that the lens in the laser head is loose, this is quickly tested and can then be ruled out as a possible fault. (or not) 
good morning, everyone. I greatly appreciate you guys reaching out and trying to help me out. So I followed your recommendations and the problem continued (losen and tighten belts, check for any/other lose screws/lense/mirror, made sure x and y were quared/90 degrees). The problem has been solved, however, not mechanically. Weird enough, my PWN rising edge valid settings for x/y were set to false, so i set them to true to see if anything would change and that seems to be the fix (in posts from 2022 some folks talked about how their x/y settings were mismatched, some recommended to make sure they matched, some set them to true and others to false). I ran 6 test jobs afterwards of the same job i posted on the pictures and all 6 ran perfect, the final job came out perfect as well…now the question is WTH happened to begin with? those settings have always been set to false in my machine/software as far as i know, i’ve never tampered with them, and the software hasnt ran an update since i last did jobs this past christmas (all jobs came out fine). I am not a software person so i understand very little what the PWN rising edge valid settings even do, but setting x/y to true fixed my problem. thank you again for reaching out, hopefully this is the end of that. @bernd.dk @JimNM