Hi Ale
1. ok, thank you, so you should used the laser for last 7 months while you got it
2. please make a check according to below steps
This problem should be caused by three reasons
1. A laser beam to the working table of all position are not vertical.
2. the focal distance is not adjusted good for cut stuff.
3. working table uneven
4. material density maldistribution or bent
We are first try to checking the factor 1
1 .A laser beam to the working table of all position are not vertical.
A laser beam to every position must be 90 degree perpendicular.
the perpendicularity will affect the machine's cutting ability especially for cutting large size material
The URL, is about check and adjust the laser beam path of the video on youtube released by our company.
http://www.youtube.com/watch?v=pw8Ro2vEEzY
You will need to check the fourth step and the fifth step of the video in youtube.
1,Draw 4 dots at the 4 corners,make sure the dots are at the same place?
2, Put 4 stickers on the nozzle of laser head and draw 4 dots at the 4 corners,
make sure the 4 dots is in the center all like attached picture 1
If the above checks are normal, we can say that the laser beam path is working fine, and please going to the next step.
PS:the laser beam to every position(you also can try to check it by test four corners and the center) must be 90 degree perpendicular.
you can use a 10mm thickness acrylic and check if it can cuts the edge is smooth and straight(90 degree perpendicular with underside)
or please find a piece acrylic and then using the laser machine hit a line and check if it is a straight line?
the perpendicularity will affect the machine's cutting ability especially for cutting large size material
please also see attached picture 2
if so, you will need to realign the laser beam path for the laser machine especially the third mirror.
If the fourth step is ok after you check. and only the fifth step has a problem
You will can only adjust the three mirror holder directly to let the laser beam vertical to the four corners of the table
See that the attached picture 3