CNC 4th & 5th Axis Retrofit Resources 4th Axis, 5th Axis, Brother CNC FANUC, Mitsubishi, Brother & Siemens CNC: External 4th/5th Axis Compatibility Guide Compatibility guide for FANUC, Mitsubishi, Brother and Siemens external 4th/5th axis retrofits, covering CSD700 integrated and YD-1 standalone control architectures plus handwheel requirements. Continue Reading