Kerf wider at the top? Surely everybody can't be wrong?

[tjones]

There are several drawings on here that help explain it. I didn’t have time to find the one I was looking for, but this thread has some drawings that show it pretty well.

What is the difference between focus height and thickness?

From the results I’ve been seeing, I would say yes. When the system goes through the calibration cycle after you turn it on, I would say that the lens system is verified and zero’d to a known internal reference. Let’s say that zero places the beam convergence at the top of the crumb tray. [image] If we place an 1/8" piece of material on the tray, enter the material and focus to 0.125. Then the focal length offset is Zero (0). The red laser scans the material and calculates the actual heigh…