My new Omtech 60W laser is cutting skewed, I’ve cut a square and measured the sides which were the same but the diagonals are off (300x300mm square the diagonals are coming out as 423.5mm and 425mm).
When measuring the distance from the X axis to the frame, it is closer on the left hand side than the right as demonstrated by the photos holding the plastic object. Is it reasonable to expect this to be the reason that the square is skewed and if so, is it possible to adjust the rail to the correct position? I’ve also attached photos of the right hand side of the rail to show the assembly.
The gantry should be attached to a belt on each side of the frame, with both of those belts being driven from a shaft across the back of the machine with a pulley for each belt. The belts will be essentially impossible to see and the pulleys will be almost unreachable.
Perhaps one of the belts is off by a tooth, so that the gantry rides slightly crooked on the linear bearings. The belts on my laser have a 3 mm tooth pitch, so adjusting a belt by one tooth on the drive pulley will skew that side of the gantry 3 mm relative to the other side.
The belt tensioners are (probably) in the front of the machine where you can see them with the lid up. You’d loosen one tensioner enough to let you slip the belt one tooth over the drive pulley in the back, then snug the tensioner again.
Alternatively, you may be able to reach the belt anchors on the ends of the gantry through the side hatches, in which case maybe you can adjust the belt position by less than one tooth pitch.
In my machine, I can see all those parts, but adjustments will require contortions I’m not sure are survivable. Good luck!
I loosened the tensioner and slipped a tooth as you advised, the square now measures perfectly across the diagonals and the first few tests seem a lot more accurate. Thank you VERY much for the help!
