Cycles
2.4 Drilling cycles
Turning Part 2: Programming (Siemens instructions)
122 Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
AXN (tool axis)
By programming the drilling axis via AXN, it is possible to omit the switchover from plane
G18 to G17 when the deep-hole drilling cycle is used on turning machines.
The identifiers have the following meanings:
AXN=1
First axis of the current plane
AXN=2
Second axis of the current plane
AXN=3
Third axis of the current plane
For example, to machine a center hole (in Z) in the G18 plane, you program:
G18
AXN=1
MDEP (minimum drilling depth)
You can define a minimum drilling depth for drill stroke calculations based on a degression
factor. If the calculated drilling stroke becomes shorter than the minimum drilling depth, the
remaining depth is machined in strokes equaling the length of the minimum drilling depth.
VRT (variable retraction value for chip breakage with VARI=0)
You can program the retraction path for chip breaking.
DTD (dwell time at final drilling depth)
The dwell time at final drilling depth can be entered in seconds or revolutions.
DIS1 (programmable limit distance for VARI=1)
The limit distance after re-insertion in the hole can be programmed.
The limit distance is calculated within the cycle as follows:
● Up to a drilling depth of 30 mm, the value is set to 0.6 mm.
● For larger drilling depths, the limit distance is the result of
(RFP + SDIS – current depth) / 50. If this calculated value >7, a limit of 7 mm, maximum,
is applied.
Programming example: Deep-hole drilling
This program executes the cycle CYCLE83 at the position X0. The first drill hole is drilled
with a dwell time zero and machining type chip breaking. The final drilling depth and the first
drilling depth are entered as absolute values. The drilling axis is the Z axis.
N10 G0 G54 G90 F5 S500 M4 ;Specification of technology values
N20 D1 T6 Z50 ; Approach retraction plane
N30 G17 X0 ; Approach drilling position
N40 CYCLE83(3.3, 0, 0, -80, 0, -10, 0, 0, 0,
0, 1, 0)
;Call of cycle, depth parameters
with absolute values
N50 M2 ; End of program
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