Centering - Cycle81 - Siemens SINUMERIK 840D sl Operating Manual

Programming a cycle
4.4 Drilling
Drilling positions
The cycle assumes the tested hole coordinates of the plane.
The hole centers should therefore be programmed before or after the cycle call as follows
(see also Section, Cycles on single position or position pattern (MCALL)):
● A single position should be programmed before the cycle call
● Position patterns (MCALL) should be programmed after the cycle call
See also
Selection of the cycles via softkey (Page 141)
Cycles for single position or position pattern (MCALL) (Page 144)
4.4.2

Centering - CYCLE81

Function
With the "Centering" function, the tool drills with the programmed spindle speed and feedrate
either:
● Down to the programmed final drilling depth or
● So deep until the programmed diameter of the centering is reached
The tool is retracted after a programmed dwell time has elapsed.
Approach/retraction
1. The tool moves with G0 to safety clearance of the reference point.
2. Inserted into the workpiece with G1 and the programmed feedrate F until the depth or the
3. On expiry of a dwell time DT, the tool is retracted at rapid traverse G0 to the retraction
152
– Diameter (centering in relation to the diameter, only for CYCLE81)
The diameter of the centering hole is programmed at Z1. In this case, the tip angle of
the tool must be specified in the tool list. The drill is inserted into the workpiece until
the specified diameter is reached.
– as drilling pattern cycle (line, circle, etc.) or
– as a sequence of positioning blocks for the hole centers
centering diameter is reached.
plane.
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
HMI sl Turning