Hello laser users.
I have a Monport 100w laser with autofocus and since 3 weeks i have a serious problem.
My horizontal lines are shaky but the vertical lines are straight like an arrow. I searched on the internet and the answer is most of the time talk the belts of the Y axe are maybe to loose or there are missing teeth in te belts. I bought the machine in januari this year and it has turned about 80 hours. The belts however are not loose and there are not missing teeth’s.
In the autofocus is a little movement but that movement is in the X anY direction so i think that that can’t be the origin of the problem.
Is there someone who can or will give me “a solution”?
A big thank for your help and greetings out of France
You have a loose mechanical connection - bolts or belts.
That suggests a mechanical problem in the gantry and its drive train, anywhere from the motor to the laser head.
There may be a loose screw in a motor pulley, although the pulleys are often press-fit to the motor shafts. If there’s a jack shaft across the back of the machine, make sure the screws in the shaft couplers are all tight against the shaft flats.
The entire laser head can be loose on the X axis belt follower, so check those screws, too.
The screws may stripped threads or the holes are overly large.
If the lock ring holding the focus lens in place isn’t snug, the lens can rattle around inside the head.
You have many places to check in addition to the belts! 
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Hello “readers” of my story.
There was a bearing who was “blocked” that caused the vibration.
Bearing changed, problem solved.
Thanks to you all and till a next time.
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Thank you for reporting the solution!
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