Quote Originally Posted by miketola View Post
Bratan. Are you aure your focal lenght is correct?
Yes I'm pretty sure. I found it draws thinnest line at 19mm from the end of the nozzle (lens is actually higher). To cut I lower nozzle by 1/2 of material thickness. I made a "jig" tool from acrylic to calibrate height for different materials. My z-table is not 100% level tho, I spend a lot of time adjusting it (after I removed timing belt), but it still a mm or two off in some corners.