Auto Camera Calibrate Suggestion

[johnse]

In response to another question about focus height, @dan had this to say

@dan

It’s all very approximate, since as soon as you start using your bed it begins to deform slightly. It’s used for dewarping, but that inaccuracy is one of the reasons lid camera alignment is only approximate right now.

When you autofocus, it measures the distance to the head, and then focuses very precisely.

Right now it always focuses on the surface. Wood and acrylic both produce total internal reflection at 10600nm so that produces excellent results throughout the cut.