Siemens SINUMERIK 840D Operation/Programming Manual page 239

3
10.04
External thread
Call help display with
the key
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SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
• Exit motion along a circular path in the same rotational direction at
programmed feedrate
• Retract to thread center point and then to retraction plane in rapid
traverse
Sequence:
• Position on starting point in retraction plane at rapid traverse
• Infeed at rapid traverse to reference plane shifted forward by
amount corresponding to safety clearance
• Approach along an approach circle calculated in the control at
programmed feedrate
• Approach motion to thread diameter on circular path
• Cut thread along a spiral path in clockwise or counterclockwise
direction (depending on whether it is left-hand or right-hand thread)
• Exit motion along a circular path in opposite rotational direction at
programmed feedrate
• Retract to retraction plane at rapid traverse
Help displays for thread cutting
Programming with ShopMill
3.7 Drilling
3
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