Siemens sinumerik 840D sl Operating Manual page 431

Approach/retraction for chipbreaking
1. The tool drills in the direction of the longitudinal axis at the programmed spindle speed S
2. The tool retracts by the retraction clearance V2 for chipbreaking.
3. The tool then drills to the next infeed depth at spindle speed S or feedrate V.
4. Steps 2 and 3 are repeated until the programmed final drilling depth Z1 is reached.
5. The direction of rotation of the spindle reverses and the tool retracts to the safety
The machine manufacturer may have made specific settings for centered tapping in a
machine data element.
Procedure
Parameters
T Tool name
D Cutting edge number
F Feedrate
Table Thread table selection:
without

ISO metric

Whitworth BSW

Whitworth BSP

UNC

Selection Selection, table value:
M1 - M68 (ISO metric)

W3/4"; etc. (Whitworth BSW)

G3/4"; etc. (Whitworth BSP)

1" - 8 UNC; etc. (UNC)

Turning
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
or feedrate V as far as the first infeed depth (maximum infeed depth D).
clearance at spindle speed SR or cutting rate VR.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
1. The ShopTurn program to be processed has been created and you
are in the editor.
2. Press the "Drilling" and "Drill centric" and "Thread centric" softkeys.
The "Centric tapping" input window opens.
Description
Programming technology functions (cycles)
8.7 Further cycles and functions ShopTurn
Unit
mm/min
mm/rev
431