Thanks for reopening.
Wanted to post about a paper I read recently. “Optical design and analysis of a high-speed triple galvanometer laser3D scanning system”, wherein they discuss the design of a triple galvo system,. The addition of an additional galvo and 2 parabolic mirrors makes for a really cool 3d head design! They coin the term TGLSS (triple galvanometer laser three-dimensions (3D) scanning
system). Will be following development of this!
So in my devlog I mentioned a method I’ve developed that doesn’t necessarily require per layer signalling for making bubblegrams. The method involves a physics accurate simulation of the the whole process of engraving with a UV laser and galvo into a block of glass, and algorithmic choice of the path and which points to cut. By also modelling a fixed z axis speed and choosing the path based on the combined model, a close enough to constant speed in x,y and z can be obtained to get a reasonable result.
This doesn’t currently solve the problems mentioned in this thread, but I’ll try modelling a deep engrave in the same manner for a MOPA, and run some tests. I think the problem may be getting the slowest consistent speed that won’t cause the steppers to be to “jerky”.
We’ve added Z Control support for Galvo lasers with motorized Z axes. You can now home and jog your laser along the Z axis using the aptly named Galvo Z Control toolbar.
This is a first step toward adding additional Galvo marking features that rely on stepped movements of motorized Z axes. Stay tuned.
New in 2.1 Release candidate whoot its moving forward.
Thanks to the DEV team for this and the other improvements!
I would assume with a BJJCZ “Lite” board these buttons would mimic the jog arrows in the rotary window after connecting the Z stepper to the rotary output. On a “Standard” board I would assume you could enable the second extension with the jumpers and run that way, but curious which settings differentiate between the primary extension (Rotary) and the secondary extension (Z drive). Further assumption only on the ezcad 3 board would the homing feature work. Or am I way out in left field? 
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