Siemens SINUMERIK 828D Operating Manual page 226

Programming technological functions (cycles)
8.1 Drilling
Approach/retraction - CYCLE84 - without compensating chuck
One cut:
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 during stock removal
1. The tool drills at the programmed spindle speed S (dependent on %S) as far as the first
2. Spindle stop and dwell time DT.
3. The tool retracts from the workpiece for the stock removal with spindle speed SR to the
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
Approach/retraction during chipbreaking
1. The tool drills at the programmed spindle speed S (dependent on %S) as far as the first
2. Spindle stop and dwell time DT.
3. The tool retracts by the retraction distance V2 for chipbreaking.
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
226
infeed depth (maximum infeed depth D).
safety clearance.
clearance. The spindle stops and retracts to the retraction plane.
infeed depth (maximum infeed depth D).
clearance. The spindle stops and retracts to the retraction plane.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
HMI sl Milling