I found the problem: it was only black plastic burrs of the spacer for a roulette of the laser carriage. Those plastic burrs acted as a brake. Now everything is fine
Posts made by cloholdo
X axis: verticals are wavy [fixed]
I have a problem on the X axis with my EleksLaser-A3-Pro-Laser-Engraver machine: The verticals are wavy!
I import a JPG image of 75 x 50 mm in 300 DPI.
The control panel of CAM V3.1 is settled like this:
Speed = 1000/mm minute - Sport-t = 0ms - Repeat = 1 times - Set Home Coordinates = Center
The Config panel: Y-Rev checked - Pulse: X & Y = 80 - Accel: X & Y = 200
The Setting panel: SyetemVer: Mana - ON/OFF = 1000 - WEAK: 1 - Show 3D Viewer & Log Operation are checked.
I loosened the wheels of the top cart so that it is free on its rail. I also relaxed the rubber band.
At first when I assembled the machine, everything worked well. Then I saw a video that showed how to wire different engines. So I disassembled the machine again to better pass the cables so that they interfere less the workspace. I made the mistake of inverting the Y1 and Y2 cables. I realized by doing a test, the image was reversed left and right. So I reconnected the cables correctly. Then doing a new test, I had for the first time wavy verticals. Since then I'm doing a lot of tests without finding the solution. Thanks for your help.