BeagleFury ()

I am new at Reprap so just ignore this if it has been considered and rejected.

My drafting skills are as rusty as my mind sometimes.

I submit this as a modification to your concept.

Some Notes:

My statement about the calculations had more to do with relative motor positions than math for two arms. When the base table rotates it changes the part table angle just a little in this design.

The base table is not round, but extended to support the part table’s lazy susan.

The Part table drive motor is at the rotational axis of the base table. This allows for no motor mass inertia on either table.

The Extruder just extends beyond the center of the part table to get access to the entire surface.

The motors can be geared to any ratio for better resolution. I hope to use DC motors instead of steppers.

I had envisioned the motor driver board taking the X and Y pulses and converting it to Base table and Part table angles. This way all Reprap software development can be used