That’s incredible! Great work! Once I get a machine I’ll have to make one of these!
I get the desire to have X Y and Z and even A on a DRO, but I can’t fathom how to make good logic of the A and B axis readouts combined.
It seems like a B axis move would kind of ruin the knowledge of the positions of the other axis?
Maybe I’m not thinking right…
–Matthew Schroeder
That’s the kinematic calculations. The post(at least in NX) knows the distance from center of B axis to center of A axis then it just some highschool maths to work out the rest.
The DRO I made is reading the values from the machine itself.
Cheers
TP
Got the RPI camera up and running, streaming the work area now. The DRO is now mounted on a small tripod so it can be positioned or raised/lowered as needed. It’s become quite the exercise in many aspects. 
This looks awesome. I’m getting my machine prob next week should be here!