1. Coordinate zero setting. 2. ? calculation to locate work piece center. 3. ABS/ INC conversion, Diameter/ Radius selection. 4. Shrink function. 5. DIR: Setting the coordinate direction. 6. RI detection: setting and recalling a datum for machining. 7. Error compensation: linear compensation. 8. ROTARY ENCODER:1°-0001°. 8. Instant power failure memory. 9. Multiple machining functions: (1) Bolt Circle machining (2) R-angle (3) Divide holes on an oblique line (4) Machining on an oblique line