Need some help/advice regarding 2 sided machining.
I've just gotten a Makera Z1 as my first CNC, and I'm still learning CAD/CAM. I've only been at it for a couple weeks now, so any insight is appreciated. I tried making a two sided program using Fusion. I've set up Fusion using Makera's official profiles, tools, post and everything. Took about a week to learn how to make a top operation, and it click a little so I finished up the bottom op today. Everything looked good in the simulation (both sides lined up), so I exported the Gcode, sent it to my Z1 and ran it.
Top side came out perfect, but the bottom side was shifted about 2mm to the left. Y and Z dimensions were perfect. X was my flip axis.
I originally drilled holes for dowels to be inserted into preexisting holes in the spoilboard, but they were too small in the stock and also misaligned from what is in the fusion profile. The stock I used was stated as 10cm x 10cm (also what I told Fusion it was) and squared on all sides, so I figured I could just flip it along the X axis and put it in the L bracket and it would be fine.
After closer examination with the calipers, the stock is actually 102mm x 102.. Is this the likely source of the 2mm X deviation, or maybe missed motor steps, or something else? I've attached a comparison of both setups as well.