Cycles
2.4 Drilling cycles
Turning Part 2: Programming (Siemens instructions)
128 Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
2.4.7 Tapping with compensating chuck - CYCLE840
Programming
CYCLE840(RTP, RFP, SDIS, DP, DPR, DTB, SDR, SDAC, ENC, MPIT, PIT, AXN)
Parameters
Parameter Data type Description
RTP REAL Retraction plane (absolute)
RFP REAL Reference plane (absolute)
SDIS REAL Safety clearance (enter without sign)
DP REAL Final drilling depth (absolute)
DPR REAL Final drilling depth relative to the reference plane (enter without
sign)
DTB REAL Dwell time at thread depth (chip breakage)
SDR INT Direction of rotation for retraction
Values: 0 (automatic direction reversal), 3 or 4 (for M3 or M4)
SDAC INT Direction of rotation after end of cycle
Values: 3, 4 or 5 (for M3, M4 or M5)
ENC INT Tapping with/without encoder
Values: 0 = with encoder, 1 = without encoder
MPIT REAL Thread lead as a thread size (signed):
Range of values: 0 (for M0) to 48 (for M48)
PST REAL Thread lead as a value (signed)
Range of values: 0.001 ... 2000.000 mm
Tool axis AXN INT
Values:
1: 1st axis of the plane
2: 2nd axis of the plane
3: 3rd axis of the plane
Function
The tool drills at the programmed spindle speed and feedrate to the entered final thread
depth.
You use this cycle to perform tapping with the compensating chuck:
● without encoder
● with encoder
Sequence
Tapping with compensating chuck without encoder
Position reached prior to cycle start:
The drilling position is the position in the two axes of the selected plane.
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