Cnc Homofaciens

https://www.youtube.com/watch?v=mJ-TZvFpY58 600,000 views. hand tools made cnc,angle iron, threading etc. using crude DIY Optical encoders. Build Angle iron based linear guide rails with ball bearings and square tube.

http://www.homofaciens.de/technics-machines-cnc-v2_en_navion.htm