3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: [email protected] or [email protected]
There are CAD communities available at: [email protected] or [email protected]
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If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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No, the trinamic system I'm talking about is end stop phase counting in tandem with physical limit switches. It's pretty accurate, one thou repeatability, like I said.
But like you point out, repeatability of the home position is not so useful if the axes of the two heads aren't aligned in the first place. That's a hardware issue that's not going to be solved with encoders or software.