Re: Worm Drive Grounded Delta Printer

@ Solidus Labs

21. Zig Zaging Up Down:
Could the error be coming from the rotation at shoulder pivots?
Maybe there is a singularity when the arm has to rotate quickly?

I showed the math to some one, and they questioned the use of acos.
They didn't explain their reasoning.

Is there a singularity at the center of the build table?
If there is, and it requires significant force to overcome, maybe the motor is skipping a step?

I'm just throwing some ideas out there...