8-7
8
Cycles
TNC 426/TNC 425/TNC 415 B/TNC 407
Example: Tapping with a floating tap holder
Cutting an M6 thread at 100 rpm
Tapping coordinates:
X
= 50 mm
Y
= 20 mm
Pitch
p
=
1 mm
F = S x p
⇒
F = 100
.....
1 = 100 mm/min
Setup clearance:
3 mm
Thread depth:
20 mm
Dwell time:
0.4 s
Feed rate:
100 mm/min
TAPPING cycle in a part program
%S87I G71 * .............................................................. Start of program
N10 G30 G17 X+0 Y+0 Z–20 * .................................. Define workpiece blank
N20 G31 G90 X+100 Y+100 Z+0 *
N30 G99 T1 L+0 R+3 * .............................................. Define tool
N40 T1 G17 S100 * .................................................... Call tool
N50 G84 P01 –5 P02 –20 P03 0.4 P04 100 * ........... Define TAPPING cycle
N60 G00 G40 G90 Z+100 M06 * ............................... Retract in the infeed axis, insert tool
N70 X+50 Y+20 M03 * ............................................... Pre-position in the plane, spindle ON
N80 Z+3 M99 * ........................................................... Pre-position in Z to setup clearance, call cycle
N90 Z+100 M02 * ....................................................... Retract in the infeed axis, end of program
N99999 %S87I G71 *
Y
X
50
20