Siemens sinumerik 808d Programming And Operating Manual page 134

Cycles
2.4 Drilling cycles
The cycle creates the following sequence of motions:
● Approach of the reference plane brought forward by the safety clearance by using G0
● Traversing to the final drilling depth with G1 and at the feedrate programmed under the
● Dwell time at final drilling depth
● Retraction to the reference plane brought forward by the safety clearance with G1 and
● Retraction to the retraction plane with G0
Explanation of the parameters
For an explanation of the parameters RTP, RFP, SDIS, DP, and DPR, refer to the topic
"Drilling, centering - CYCLE81 (Page 112)".
DTB (dwell time)
The dwell time to the final drilling depth is programmed under DTB in seconds.
FFR (feedrate)
The feedrate value programmed under FFR is active in drilling.
RFF (retraction feedrate)
The feedrate value programmed under RFF is active when retracting from the hole to the
reference plane + safety clearance.
Programming example: First boring pass
CYCLE85 is called at Z70 X0. The drilling axis is the Z axis. The value for the final drilling
depth in the cycle call is programmed as a relative value; no dwell time is programmed. The
workpiece upper edge is at Z0.
N10 G90 G0 S300 M3
N20 T3 G17 G54 Z70 X0
134
parameter FFR
the retraction feedrate defined under the parameter RFF
; Approach drilling position
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0