Siemens SINUMERIK 840D Programming Manual page 86

Drilling Cycles and Drilling Patterns
2
2.1 Drilling cycles
Description of parameters
See Section 2.1.2. (Drilling, Centering – CYCLE81)
for a description of parameters RTP, RFP, SDIS,
DP, DPR
Cycle setting data _ZSD[5] see Section 3.2.
DTB (dwell time)
Parameter DTB is the dwell time at the final drilling
depth (chip breaking) in seconds.
SDIR (direction of rotation)
The programmed direction of rotation is active for
the movement to the final drilling depth.
If values other than 3 or 4 (M3/M4) are programmed,
alarm 61102 "No spindle direction programmed" is
output and the cycle is aborted.
Programming example
Fourth boring pass
Cycle CYCLE88 is called at position X80 Y90 in the
ZX plane.
The boring axis is the Z axis.
The safety clearance is programmed as 3 mm. The
final drilling depth is defined as a value relative to the
reference plane.
M4 is active in the cycle.
DEF REAL RFP, RTP, DPR, DTB, SDIS
N10 RFP=102 RTP=105 DPR=72 DTB=3 SDIS=3
N20 G17 G90 F100 S450
N30 G0 X80 Y90 Z105
N40 CYCLE88 (RTP, RFP, SDIS, , DPR, ->
-> DTB, 4)
N50 M30
-> Must be programmed in a single block
2-86
Z
Y
80
Definition of parameters
Value assignments
Specification of technology values
Traverse to drilling position
Cycle call with programmed
spindle direction M4
End of program
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
03.96
2
G0
G1
G4
RTP
RFP+SDIS
RFP
X
DP=RFP-DPR
Y A - B
A
B
X
30
102
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Z