Cycles
2.4 Drilling cycles
Turning Part 2: Programming (Siemens instructions)
124 Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
Function
The tool drills at the programmed spindle speed and feedrate to the entered final thread
depth.
CYCLE84 can be used to make tapped holes without compensating chuck. For tapping with
compensating chuck, a separate cycle CYCLE840 is provided.
Note
CYCLE84 can be used if the spindle to be used for the boring operation is technically able to
be operated in the position-controlled spindle operation.
Sequence
Position reached prior to cycle start:
The drilling position is the position in the two axes of the selected plane.
The cycle creates the following sequence of motions:
● Approach of the reference plane brought forward by the safety clearance by using G0
● Oriented spindle stop (value in the parameter POSS) and switching the spindle to axis
mode
● Tapping to final drilling depth and speed SST
● Dwell time at thread depth (parameter DTB)
● Retraction to the reference plane brought forward by the safety clearance, speed SST1
and direction reversal
● Retraction to the retraction plane with G0; spindle mode is reinitiated by reprogramming
the spindle speed active before the cycle was called and the direction of rotation
programmed under SDAC
Explanation of the parameters
For the parameters RTP, RFP, SDIS, DP, DPR, refer to the topic "Drilling, centering -
CYCLE81 (Page
112)".
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