HEIDENHAIN TNC 320 (340 55x-04) Cycle programming - Manual (Page 94)

94 Fixed Cycles: Tapping / Thread Milling
4.2 T
A
PPING NEW with a Floating T
a
p Holder (Cy
c
le 206, DIN/ISO: G206)
Cycle parameters
U Setup clearance Q200 (incremental): Distance
between tool tip (at starting position) and workpiece
surface. Standard value: approx. 4 times the thread
pitch. Input range 0 to 99999.9999
U Total hole depth Q201 (thread length, incremental):
Distance between workpiece surface and end of
thread. Input range –99999.9999 to 99999.9999
U Feed rate F Q206: Traversing speed of the tool during
tapping. Input range: 0 to 99999.999, alternatively
FAUTO
U Dwell time at bottom Q211: Enter a value between
0 and 0.5 seconds to avoid wedging of the tool during
retraction. Input range 0 to 3600.0000
U Workpiece surface coordinate Q203 (absolute):
Coordinate of the workpiece surface. Input range:
-99999.9999 to 99999.9999
U 2nd setup clearance Q204 (incremental): Coordinate
in the spindle axis at which no collision between tool
and workpiece (fixtures) can occur. Input range 0 to
99999.9999
The feed rate is calculated as follows: F = S x p
Retracting after a program interruption
If you interrupt program run during tapping with the machine stop
button, the TNC will display a soft key with which you can retract the
tool.
Example: NC blocks
25 CYCL DEF 206 TAPPING NEW
Q200=2 ;SETUP CLEARANCE
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR PLNGNG
Q211=0.25 ;DWELL TIME AT DEPTH
Q203=+25 ;SURFACE COORDINATE
Q204=50 ;2ND SETUP CLEARANCE
Z
X
Q203
Q200
Q201
Q211
Q206
Q204
F: Feed rate (mm/min)
S: Spindle speed (rpm)
p: Thread pitch (mm)