Cycle Parameters - HEIDENHAIN TNC 620 User Manual

TAPPING WITH CHIP BREAKING (Cycle 209, DIN/ISO: G209,

Cycle parameters

Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999
Thread depth Q201 (incremental): Distance
between workpiece surface and root of thread.
Input range -99999.9999 to 99999.9999
Thread pitch Q239: Pitch of the thread. The
algebraic sign differentiates between right-hand and
left-hand threads:
+
= right-hand thread
–= left-hand thread
Input range -99.9999 to 99.9999
Coordinate of workpiece surface Q203 (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
2nd set-up 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
Infeed depth for chip breaking Q257
(incremental): Depth at which the TNC carries out
chip breaking. No chip breaking if 0 is entered. Input
range 0 to 99999.9999
Retraction rate for chip breaking Q256: The
TNC multiplies the pitch Q239 by the programmed
value and retracts the tool by the calculated value
during chip breaking. If you enter Q256 = 0, the
TNC retracts the tool completely from the hole (to
the set-up clearance) for chip breaking. Input range
0.000 to 99999.999
Angle for spindle orientation Q336 (absolute):
Angle at which the TNC positions the tool before
machining the thread. This allows you to regroove
the thread, if required. Input range -360.0000 to
360.0000
TNC 620 | User's Manual Cycle Programming | 3/2014
software option 19)
NC blocks
26 CYCL DEF 209 TAPPING W/ CHIP
BRKG
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q239=+1 ;THREAD PITCH
Q203=+25 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP
CLEARANCE
Q257=5 ;DEPTH FOR CHIP
BRKNG
Q256=+1 ;DIST. FOR CHIP BRKNG
Q336=50 ;ANGLE OF SPINDLE
Q403=1.5 ;RPM FACTOR
4
4.4
105