Here is a Harbor Freight 47158 Micro-Mill that has been converted into a CNC controlled mill. Several parts for this conversion were made on another (manual) mill. Other parts needed were sourced from McMaster-Carr. This setup is sporting a homemade coolant system and a low-cost Home/Limit switch system using Hall-Effect sensors (Digikey part # DN6848-ND).
There is also a part two of the article that basically rebuilds the entire conversion in order to make it a stronger, more robust machine. Here is a picture of the new pulley system:
Read all about it in this two part series on the balbots.com site:
