Tell us about yourself!
using LM324 ?
Very cool your project, does not work on RaspBerry Pi3?Cesario
I use many years the toner process by thermal transfer, made a laminator using a printer fuser laser and my boards are perfect. I even double-sided boards. With a resolution of 0.2 mm.
Design my PCBs using Altium Protel program, export the holes map with DXF format and import directly ArtCAM 9.0. Where to create the path of the holes and use a CNC.
Excellent project. I will use a RASPBERRY PI3 to control everything.How did you do to move his arms, show some photos.