Siemens SINUMERIK 840D sl Operating Manual page 318

Programming technology functions (cycles)
10.1 Drilling
5. Retraction to safety clearance with G1.
6. Reversal of direction of rotation or spindle stop.
7. Retraction to retraction plane with G0.
Approach/retraction CYCLE84 - without compensating chuck in the "1 cut" mode
1. Travel with G0 to the safety clearance of the reference point.
2. Spindle is synchronized and started with the programmed speed (dependent on %S).
3. Tapping with spindle-feedrate synchronization to Z1.
4. Spindle stop and dwell time at drilling depth.
5. Spindle reverse after dwell time has elapsed.
6. Retraction with active spindle retraction speed (dependent on %S) to safety clearance
7. Spindle stop.
8. Retraction to retraction plane with G0.
Approach/retraction CYCLE84 - without compensating chuck in the "swarf removal" mode
1. The tool drills at the programmed spindle speed S (dependent on %S) as far as the 1st
infeed depth (maximum infeed depth D).
2. Spindle stop and dwell time DT.
3. The tool retracts from the workpiece for the stock removal with spindle speed SR to the
safety clearance.
4. Spindle stop and dwell time DT.
5. The tool then drills with spindle speed S as far as the next infeed depth.
6. Steps 2 to 5 are repeated until the programmed final drilling depth Z1 is reached.
7. On expiry of dwell time DT, the tool is retracted with spindle speed SR to the safety
clearance. The spindle stops and retracts to the retraction plane.
Approach/retraction CYCLE84 - without compensating chuck in the "chip breaking" mode
1. The tool drills at the programmed spindle speed S (dependent on %S) as far as the 1st
infeed depth (maximum infeed depth D).
2. Spindle stop and dwell time DT.
3. The tool retracts by the retraction distance V2 for chip breaking.
4. The tool then drills to the next infeed depth at spindle speed S (dependent on %S).
5. Steps 2 to 4 are repeated until the programmed final drilling depth Z1 is reached.
6. On expiry of dwell time DT, the tool is retracted with spindle speed SR to the safety
clearance. The spindle stops and retracts to the retraction plane.
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Operating Manual, 05/2017, A5E40868721
Turning