I have one of these rotary axis on my router. I have it tuned to make 10 full rotations clockwise and then back counterclockwise. It is coming to "zero" each way. BUT, when I use it in machining for indexing my operations sequence has the rotary indexing -90, 90, -90, 90 then back to zero. I get a stacking error that ends up causing problems with part dimensions.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


Right now I am using it as a manual indexer and setting the position with measuring tools before starting that next operation. It works but kills using the full function of the axis via programmed moves.

Thoughts on ways to deal with this or what may be causing the errors?