Fig. 1. Schematic of tool deviation position

Fig. 2. Residual of central cone

Fig. 3. Residual of central cylinder

Fig. 4. Schematic of convex sphere when the tool does not pass the center

Fig. 5. Convex sphere when the tool does not pass the center

Fig. 6. Convex sphere when the tool passes the center

Fig. 7. Convex sphere when the tool passes the center

Fig. 8. Error types of traditional groove tool setting method

Fig. 9. Flow chart and result analysis of two-step tool setting method

Fig. 10. Optimized groove tool setting method

Fig. 11. Industrial microscope test results

Fig. 12. Error curve of surface profile

Fig. 13. Fitting results of left and right contours

Fig. 14. Machining results of traditional tool setting method

Fig. 15. Processing results of two step tool setting method