BearingCupVersionTwo: Difference between revisions
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;; Insert Appropriate drill bit (.166 for slip, M4-0.7 tap drill bit for threads) | ;; Insert Appropriate drill bit (.166 for slip, M4-0.7 tap drill bit for threads) | ||
;; Zero Z to shoulder of drill bit | ;; Zero Z to shoulder of drill bit | ||
;; Check | ;; Check H64 in CNC control system for zero offset | ||
;; Check | ;; Check T64 in CNC control system for zero diameter | ||
G21 (set units to millimeters) | G21 (set units to millimeters) | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) | F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) | ||
T64 (set tool with zero height and diameter) | |||
G43 | G43 H64 (set height offset zero) | ||
G0 Z20 (traverse to 20mm above part) | G0 Z20 (traverse to 20mm above part) | ||
| Line 31: | Line 31: | ||
G0 Z20 (traverse to 20mm above) | G0 Z20 (traverse to 20mm above) | ||
G0 X-8 Y-12.09 (traverse to screw hole center XY) | |||
G0 Z5 (traverse to 5mm above) | |||
G1 Z-5 (peck to 5mm deep) | |||
G0 Z6 (retract to 6mm above) | |||
G0 Z0 (traverse to 0mm above) | |||
G1 Z-10 (peck to 10mm deep - top has not been faced yet) | |||
G0 Z20 (traverse to 20mm above) | |||
M30 (end of program) | M30 (end of program) | ||
</pre> | </pre> | ||
| Line 45: | Line 53: | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) | F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) | ||
T64 (tool with zero height and diameter) | |||
G43 | G43 H64 (height offset zero) | ||
G0 Z20 (traverse to 20mm above part) | G0 Z20 (traverse to 20mm above part) | ||
| Line 71: | Line 79: | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) | F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) | ||
T64 (tool with zero height and diameter) | |||
G43 | G43 H64 (height offset zero) | ||
G0 Z20 (traverse to 20mm above part) | G0 Z20 (traverse to 20mm above part) | ||
| Line 95: | Line 103: | ||
;; Insert 6mm carbide square end mill | ;; Insert 6mm carbide square end mill | ||
;; Set RPM to 5,000, 300 SFM | ;; Set RPM to 5,000, 300 SFM | ||
;; Zero Z to | ;; Zero Z to 0.2mm below surface (depth of the facing operation, leaving 12.5mm of material) | ||
G21 (set units to millimeters) | G21 (set units to millimeters) | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | ||
T64 (tool with zero height and diameter) | |||
G43 | G43 H64 (height offset zero) | ||
G0 Z20 (traverse to 20mm above part) | G0 Z20 (traverse to 20mm above part) | ||
| Line 109: | Line 117: | ||
G0 X20 Y0.56 (traverse to outside part) | G0 X20 Y0.56 (traverse to outside part) | ||
G0 Z5 (traverse to 5mm above part) | G0 Z5 (traverse to 5mm above part) | ||
G1 Z0 (feed to | G1 Z0.1 (feed to 0.1 above final facing depth) | ||
G1 X6.34 Y9.59 (feed to start of upper right ear) | G1 X6.34 Y9.59 (feed to start of upper right ear) | ||
G1 Z0 (feed to final facing depth) | |||
G2 X6.34 Y9.59 I1.66 J2.5 (CW arc cut to same position about upper right ear) | G2 X6.34 Y9.59 I1.66 J2.5 (CW arc cut to same position about upper right ear) | ||
G3 X-6.34 Y-9.59 I-6.34 J-9.59 (CCW arc cut to lower left ear about origin) | G3 X-6.34 Y-9.59 I-6.34 J-9.59 (CCW arc cut to lower left ear about origin) | ||
| Line 128: | Line 137: | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | ||
T64 (tool with zero height and diameter) | |||
G43 | G43 H64 (height offset zero) | ||
G17 (set XY coordinate system for arc cuts) | G17 (set XY coordinate system for arc cuts) | ||
| Line 206: | Line 215: | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | ||
T64 (tool with zero height and diameter) | |||
G43 | G43 H64 (height offset zero) | ||
G17 (set XY coordinate system for arc cuts) | G17 (set XY coordinate system for arc cuts) | ||
| Line 217: | Line 226: | ||
;; Rough Cut for Perimeter | ;; Rough Cut for Perimeter | ||
G1 Z-2 (feed to 2mm below surface) | G1 Z-2 (feed to 2mm below surface) | ||
G1 X14.01 Y7.2 (feed to A) | |||
G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | ||
G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | ||
G2 X1.14 Y15.71 I14.01 J7.2 (C to D) | G2 X1.14 Y15.71 I14.01 J7.2 (C to D) | ||
G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) | G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) | ||
G1 X20 Y7.2 | G1 X20 Y7.2 (feed to outside part) | ||
G1 Z-4 (feed to 4mm below surface) | G1 Z-4 (feed to 4mm below surface) | ||
G1 X14.01 Y7.2 (feed to A) | |||
G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | ||
G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | ||
| Line 229: | Line 240: | ||
G1 X20 Y7.2 | G1 X20 Y7.2 | ||
G1 Z-6 (feed to 6mm below surface) | G1 Z-6 (feed to 6mm below surface) | ||
G1 X14.01 Y7.2 (feed to A) | |||
G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | ||
G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | ||
| Line 235: | Line 247: | ||
G1 X20 Y7.2 | G1 X20 Y7.2 | ||
G1 Z-8 (feed to 8mm below surface) | G1 Z-8 (feed to 8mm below surface) | ||
G1 X14.01 Y7.2 (feed to A) | |||
G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | ||
G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | ||
| Line 241: | Line 254: | ||
G1 X20 Y7.2 | G1 X20 Y7.2 | ||
G1 Z-9 (feed to 9mm below surface) | G1 Z-9 (feed to 9mm below surface) | ||
G1 X14.01 Y7.2 (feed to A) | |||
G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) | ||
G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) | ||
| Line 252: | Line 266: | ||
F200 (set feed speed to 200mm per minute, 0.010 mm per tooth) | F200 (set feed speed to 200mm per minute, 0.010 mm per tooth) | ||
G1 Z-9 (feed to 9mm below part) | G1 Z-9 (feed to 9mm below part) | ||
G2 X-1. | G1 X13.71 Y7.23 (feed to A) | ||
G2 X- | G2 X-1.29 Y-15.45 I-13.71 J-7.23 (A to B) | ||
G2 X1. | G2 X-13.71 Y-7.23 I-6.71 J3.36 (B to C) | ||
G2 | G2 X1.29 Y15.45 I13.71 J7.23 (C to D) | ||
G2 X13.71 Y7.23 I6.71 J-3.36 (D to A) | |||
G1 X20 Y7.23 | G1 X20 Y7.23 | ||
| Line 270: | Line 285: | ||
;; Set RPM to 5,000, 300 SFM | ;; Set RPM to 5,000, 300 SFM | ||
;; Flip Material Front to Back | ;; Flip Material Front to Back | ||
;; Verify 3.5mm from surface to main cut from top face | |||
;; Zero X to 14mm in from right end of material | ;; Zero X to 14mm in from right end of material | ||
;; Zero Y to middle of part (should be unchanged) | ;; Zero Y to middle of part (should be unchanged) | ||
;; Zero Z to | ;; Zero Z to surface. | ||
G21 (set units to millimeters) | G21 (set units to millimeters) | ||
G90 (set measurements to absolute, relative to machine zero) | G90 (set measurements to absolute, relative to machine zero) | ||
F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) | ||
T64 (tool with zero height and diameter) | |||
G43 | G43 H64 (height offset zero) | ||
G17 (set XY coordinate system for arc cuts) | |||
G0 Z20 (traverse to 20mm above part) | G0 Z20 (traverse to 20mm above part) | ||
G0 X20 Y-0.56 (traverse to outside part) | G0 X20 Y-0.56 (traverse to outside part) | ||
G0 Z5 (traverse to 5mm above part) | G0 Z5 (traverse to 5mm above part) | ||
G1 | G1 Z-2.4 (feed to 0.1 above facing depth) | ||
G1 X6.34 Y-9.59 (feed to start of upper right ear) | G1 X6.34 Y-9.59 (feed to start of upper right ear) | ||
G1 Z-2.5 (feed to 2.5mm below surface) | |||
G3 X6.34 Y-9.59 I1.66 J-2.5 (CCW arc cut to same position about upper right ear) | G3 X6.34 Y-9.59 I1.66 J-2.5 (CCW arc cut to same position about upper right ear) | ||
G2 X-6.34 Y9.59 I-6.34 J9.59 (CW arc cut to lower left ear about origin) | G2 X-6.34 Y9.59 I-6.34 J9.59 (CW arc cut to lower left ear about origin) | ||
| Line 295: | Line 311: | ||
G1 X20 Y-0.56 (feed to outside part) | G1 X20 Y-0.56 (feed to outside part) | ||
F200 (slow feed to 200mm, 0.010mm per tooth) | |||
G1 | G1 Z-3.4 (feed to 0.1mm above facing depth) | ||
G1 X6.34 Y-9.59 (feed to start of upper right ear) | G1 X6.34 Y-9.59 (feed to start of upper right ear) | ||
G1 Z-3.5 (feed to final facing depth) | |||
G3 X6.34 Y-9.59 I1.66 J-2.5 (CCW arc cut to same position about upper right ear) | G3 X6.34 Y-9.59 I1.66 J-2.5 (CCW arc cut to same position about upper right ear) | ||
G2 X-6.34 Y9.59 I-6.34 J9.59 (CW arc cut to lower left ear about origin) | G2 X-6.34 Y9.59 I-6.34 J9.59 (CW arc cut to lower left ear about origin) | ||
Latest revision as of 04:51, 24 July 2022
Drill Ears
;; ------------------------------ ;; Drill Ears (001) ;; ------------------------------ ;; Use 1/2" x 2" rectangle 6061 T6, at least 28mm long. ;; Spindle RPM to 1200 ;; Zero X to 14mm in from right end ;; Zero Y to middle of material ;; Insert Appropriate drill bit (.166 for slip, M4-0.7 tap drill bit for threads) ;; Zero Z to shoulder of drill bit ;; Check H64 in CNC control system for zero offset ;; Check T64 in CNC control system for zero diameter G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) T64 (set tool with zero height and diameter) G43 H64 (set height offset zero) G0 Z20 (traverse to 20mm above part) G0 X8 Y12.09 (traverse to screw hole center XY) G0 Z5 (traverse to 5mm above) G1 Z-5 (peck to 5mm deep) G0 Z6 (retract to 6mm above) G0 Z0 (traverse to 0mm above) G1 Z-10 (peck to 10mm deep - top has not been faced yet) G0 Z20 (traverse to 20mm above) G0 X-8 Y-12.09 (traverse to screw hole center XY) G0 Z5 (traverse to 5mm above) G1 Z-5 (peck to 5mm deep) G0 Z6 (retract to 6mm above) G0 Z0 (traverse to 0mm above) G1 Z-10 (peck to 10mm deep - top has not been faced yet) G0 Z20 (traverse to 20mm above) M30 (end of program)
Drill Center
;; ------------------------------------ ;; Drill Center, Starter Bit (002) ;; ------------------------------------ ;; Insert 5/16" or 8mm drill bit ;; Zero Z to shoulder of drill bit G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) T64 (tool with zero height and diameter) G43 H64 (height offset zero) G0 Z20 (traverse to 20mm above part) G0 X0 Y0 (traverse to screw hole center XY) G0 Z5 (traverse to 5mm above) G1 Z-5 (peck to 5mm deep) G0 Z6 (retract to 6mm above) G0 Z0 (traverse to 0mm above) G1 Z-10 (peck to 10mm deep - top has not been faced yet) G0 Z20 (traverse to 20mm above) M30 (end of program)
;; ------------------------------------ ;; Drill Center, Final Bit (003) ;; ------------------------------------ ;; Insert 1/2" or 13mm drill bit ;; Zero Z to shoulder of drill bit G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F60 (set feed rate to 60mm per minute, 0.025 mm per tooth) T64 (tool with zero height and diameter) G43 H64 (height offset zero) G0 Z20 (traverse to 20mm above part) G0 X0 Y0 (traverse to screw hole center XY) G0 Z5 (traverse to 5mm above) G1 Z-5 (peck to 5mm deep) G0 Z6 (retract to 6mm above) G0 Z0 (traverse to 0mm above) G1 Z-10 (peck to 10mm deep - top has not been faced yet) G0 Z20 (traverse to 20mm above) M30 (end of program)
Face Part
;; ---------------------------------------- ;; Face Part (004) ;; ---------------------------------------- ;; Insert 6mm carbide square end mill ;; Set RPM to 5,000, 300 SFM ;; Zero Z to 0.2mm below surface (depth of the facing operation, leaving 12.5mm of material) G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) T64 (tool with zero height and diameter) G43 H64 (height offset zero) G0 Z20 (traverse to 20mm above part) G17 (set XY coordinate system for arc cuts) G0 X20 Y0.56 (traverse to outside part) G0 Z5 (traverse to 5mm above part) G1 Z0.1 (feed to 0.1 above final facing depth) G1 X6.34 Y9.59 (feed to start of upper right ear) G1 Z0 (feed to final facing depth) G2 X6.34 Y9.59 I1.66 J2.5 (CW arc cut to same position about upper right ear) G3 X-6.34 Y-9.59 I-6.34 J-9.59 (CCW arc cut to lower left ear about origin) G2 X-6.34 Y-9.59 I-1.66 J-2.5 (CW arc cut to same position about lower left ear) G3 X6.34 Y9.59 I6.34 J9.59 (CCW arc cut back to where we stared about origin) G0 Z20 (traverse to 20mm above) M30 (end of program)
Round Pocket in Center
;; -------------------------------------- ;; Round Pocket in Center (005) ;; -------------------------------------- G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) T64 (tool with zero height and diameter) G43 H64 (height offset zero) G17 (set XY coordinate system for arc cuts) G0 Z20 (traverse to 20mm above) G0 X0 Y0 (traverse to starting point) ;; Rough Cut for Retainer G0 Z5 (traverse to 5mm above part) G1 Z-2 (2mm below surface) G1 X5.75 Y0 (8.75mm R / 17.5 mm D) G3 X5.75 Y0 I-5.75 J0 (circle about origin) G1 X0 Y0 G1 Z-4 (4mm below surface) G1 X5.75 Y0 (8.75mm R / 17.5 mm D) G3 X5.75 Y0 I-5.75 J0 (circle about origin) G1 X0 Y0 G1 Z-6 (6mm below surface) G1 X5.75 Y0 (8.75mm R / 17.5 mm D) G3 X5.75 Y0 I-5.75 J0 (circle about origin) G1 X0 Y0 G1 Z-8 (8mm below surface) G1 X5.75 Y0 (8.75mm R / 17.5 mm D) G3 X5.75 Y0 I-5.75 J0 (circle about origin) G1 X0 Y0 G1 Z-9 (9mm below surface) G1 X5.75 Y0 (8.75mm R / 17.5 mm D) G3 X5.75 Y0 I-5.75 J0 (circle about center) G1 X0 Y0 ;; Rough Cut for Bearing Cup G0 Z5 (traverse to 5mm above part) G1 Z-2 (2mm below surface) G1 X7.75 Y0 (10.75mm R / 21.5 mm D) G3 X7.75 Y0 I-7.75 J0 (circle about origin) G1 X0 Y0 G1 Z-4 (4mm below surface) G1 X7.75 Y0 (10.75mm R / 21.5 mm D) G3 X7.75 Y0 I-7.75 J0 (circle about origin) G1 X0 Y0 G1 Z-6 (6mm below surface) G1 X7.75 Y0 (10.75mm R / 21.5 mm D) G3 X7.75 Y0 I-7.75 J0 (circle about origin) G1 X0 Y0 G1 Z-6.85 (6.85mm below surface) G1 X7.80 Y0 (10.80mm R / 21.6 mm D) G3 X7.80 Y0 I-7.80 J0 (circle about origin) G1 X0 Y0 ;; Finish Cut for Retainer G0 X0 Y0 (traverse to origin XY) F200 (set feed speed to 200mm per minute, 0.010 mm per tooth) G1 Z-9 (feed to 9mm below part) G1 X6 Y0 (9mm R / 18mm D) G3 X6 Y0 I-6 J0 (circle about origin) G1 X0 Y0 ;; Finish Cut for Bearing Cup G0 X0 Y0 (traverse to origin XY) F200 (set feed speed to 200mm per minute, 0.010 mm per tooth) G1 Z-7.1 (feed to 7.1mm below surface) G1 X8.05 Y0 (11.05mm R / 22.1mm D) G3 X8.05 Y0 I-8.05 J0 (circle about origin) G1 X0 Y0 G0 Z20 (traverse to 20mm above) M30 (end of program)
Perimeter Cut
;; -------------------------------------- ;; Perimeter Cut (006) ;; -------------------------------------- G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) T64 (tool with zero height and diameter) G43 H64 (height offset zero) G17 (set XY coordinate system for arc cuts) G0 Z20 (traverse to 20mm above) G0 X20 Y7.2 (traverse to starting point) G0 Z5 (traverse to 5mm above part) ;; Rough Cut for Perimeter G1 Z-2 (feed to 2mm below surface) G1 X14.01 Y7.2 (feed to A) G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) G2 X1.14 Y15.71 I14.01 J7.2 (C to D) G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) G1 X20 Y7.2 (feed to outside part) G1 Z-4 (feed to 4mm below surface) G1 X14.01 Y7.2 (feed to A) G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) G2 X1.14 Y15.71 I14.01 J7.2 (C to D) G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) G1 X20 Y7.2 G1 Z-6 (feed to 6mm below surface) G1 X14.01 Y7.2 (feed to A) G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) G2 X1.14 Y15.71 I14.01 J7.2 (C to D) G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) G1 X20 Y7.2 G1 Z-8 (feed to 8mm below surface) G1 X14.01 Y7.2 (feed to A) G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) G2 X1.14 Y15.71 I14.01 J7.2 (C to D) G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) G1 X20 Y7.2 G1 Z-9 (feed to 9mm below surface) G1 X14.01 Y7.2 (feed to A) G2 X-1.14 Y-15.71 I-14.01 J-7.2 (A to B) G2 X-14.01 Y-7.2 I-6.86 J3.62 (B to C) G2 X1.14 Y15.71 I14.01 J7.2 (C to D) G2 X14.01 Y7.2 I6.86 J-3.62 (D to A) G1 X20 Y7.2 G1 X20 Y7.23 (feed to starting point) ;; Finish Cut for Perimeter F200 (set feed speed to 200mm per minute, 0.010 mm per tooth) G1 Z-9 (feed to 9mm below part) G1 X13.71 Y7.23 (feed to A) G2 X-1.29 Y-15.45 I-13.71 J-7.23 (A to B) G2 X-13.71 Y-7.23 I-6.71 J3.36 (B to C) G2 X1.29 Y15.45 I13.71 J7.23 (C to D) G2 X13.71 Y7.23 I6.71 J-3.36 (D to A) G1 X20 Y7.23 G0 Z20 (traverse to 20mm above) M30 (end of program)
Release Part
;; ---------------------------------------- ;; Release Part (007) ;; ---------------------------------------- ;; Insert 6mm carbide square end mill ;; Set RPM to 5,000, 300 SFM ;; Flip Material Front to Back ;; Verify 3.5mm from surface to main cut from top face ;; Zero X to 14mm in from right end of material ;; Zero Y to middle of part (should be unchanged) ;; Zero Z to surface. G21 (set units to millimeters) G90 (set measurements to absolute, relative to machine zero) F500 (set feed speed to 500mm per minute, 0.025 mm per tooth) T64 (tool with zero height and diameter) G43 H64 (height offset zero) G17 (set XY coordinate system for arc cuts) G0 Z20 (traverse to 20mm above part) G0 X20 Y-0.56 (traverse to outside part) G0 Z5 (traverse to 5mm above part) G1 Z-2.4 (feed to 0.1 above facing depth) G1 X6.34 Y-9.59 (feed to start of upper right ear) G1 Z-2.5 (feed to 2.5mm below surface) G3 X6.34 Y-9.59 I1.66 J-2.5 (CCW arc cut to same position about upper right ear) G2 X-6.34 Y9.59 I-6.34 J9.59 (CW arc cut to lower left ear about origin) G3 X-6.34 Y9.59 I-1.66 J2.5 (CCW arc cut to same position about lower left ear) G2 X6.34 Y-9.59 I6.34 J-9.59 (CW arc cut back to where we stared about origin) G1 X20 Y-0.56 (feed to outside part) F200 (slow feed to 200mm, 0.010mm per tooth) G1 Z-3.4 (feed to 0.1mm above facing depth) G1 X6.34 Y-9.59 (feed to start of upper right ear) G1 Z-3.5 (feed to final facing depth) G3 X6.34 Y-9.59 I1.66 J-2.5 (CCW arc cut to same position about upper right ear) G2 X-6.34 Y9.59 I-6.34 J9.59 (CW arc cut to lower left ear about origin) G3 X-6.34 Y9.59 I-1.66 J2.5 (CCW arc cut to same position about lower left ear) G2 X6.34 Y-9.59 I6.34 J-9.59 (CW arc cut back to where we stared about origin) G1 X20 Y-0.56 (feed to outside part) G0 Z20 (traverse to 20mm above) M30 (end of program)