G73-G89 - hole machining canned cycles

1. G73-G89 - hole machining canned cycles Relates only to machining centers & turning centers with live tooling

2. Example: Drilling command N255 G54 G90 S2000 M03 T02 N260 G00 X1.0 Y1.0 N265 G43 H01 Z0.1 N270 G81 R0.1 Z-0.15 F4.0 G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80

3. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

4. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

5. G73 – chip-break peck drilling: G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Rapid to R plane • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

6. G73 – chip-break peck drilling: G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Feed the peck amount (Q) • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

7. G73 – chip-break peck drilling: Set by parameter G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Back up slightly to break chip • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

8. G83 – deep-hole peck drilling: G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Rapid to R plane • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

9. G83 – deep-hole peck drilling: G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Feed peck amount (Q) • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

10. G83 – deep-hole peck drilling: G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Retract to clear chips • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

11. G83 – deep-hole peck drilling: Set by parameter G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: There are two important cycle-time-related parameters you should know • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: Rapid back into hole • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

12. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

13. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

14. 3 1 95 6 O0001 N005 T01 M06 N010 G54 G90 S2000 M03 T02 N015 G00 X1.0 Y1.0 N020 G43 H01 Z0.1 N025 G81 R0.1 Z-0.15 F4.0 N030 X2.0 N035 X3.0 N040 Y2.0 L0 N045 X5.0 L0 N050 Y1.0 N055 X6.0 N060 G80 N065 G91 G28 Z0 M19 N070 M01 . . Machine first three holes Clear obstruction Machine fourth & fifth holes G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: Do you need to clear obstructions? • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 You know that G98 and G99 let you avoid obstructions in Z Understanding how L0 works lets you clear them in XY Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode Consider this program… In essence, L0 is saying “Don’t machine a hole in this command”

15. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

16. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode

17. Move one inch to the left of left-most hole Machine all ten holes! G73-G89 – hole machining canned cycles G73-G89 – hole machining canned cycles O0001 N005 T01 M06 N010 G54 G90 S2000 M03 T02 N015 G00 X0 Y1.0 N020 G43 H01 Z0.1 N025 G91 G81 X1.0 R0 Z-0.25 F4.0 L10 N030 G80 N035 G91 G28 Z0 M19 N040 M01 . . . N400 M30 Commonly taught in basic CNC courses: Incremental mode can help you machine evenly spaced holes • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 The meanings of X, Y, R, and Z change in the incremental mode Not always taught in basic courses: X&Y – distance to hole to be machined R – distance from current Z position to R plane Z – distance from R plane to hole bottom • Related parameters • L0 with canned cycles • Canned cycles in incremental mode Another example (with drawing) is shown in the lesson text

18. G73-G89 – hole machining canned cycles Commonly taught in basic CNC courses: • Dramatically simplifies hole machining • One command per hole • Canned cycles are cancelled by G80 Not always taught in basic courses: • Related parameters • L0 with canned cycles • Canned cycles in incremental mode