After some go and back calibration process, I can say it is ok. I carved a star and a circle in de middle of the table and other in an upper corner and I can say it is almost OK.
BUT!!!.. I make a 2200 mm line in the top of the support frame and this is what it do
As you can see is a good zigzag… my question is why? the same thing happend in the middle of the panel. but I don see this problem in the star… may be are very short lines…
I am thinking in the sled mounting braces… may be they have some friction that i dont feel… or the carving bit to wide? (6mm)… the OSB is tricky to cut it have hard and soft places…
I am going to make more cuts with a thinner bit or over a plywood, but may be somebody had the same problem yet, and had resolved it. If this is the case… here I am