Cycle Parameters - HEIDENHAIN TNC 620 User Manual

4
Fixed Cycles: Tapping / Thread Milling | TAPPING WITH CHIP BREAKING (Cycle 209, DIN/ISO: G209, software

Cycle parameters

Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface. Input
range 0 to 99999.9999
Q201 Depth of thread? (incremental): Distance
between workpiece surface and root of thread.
Input range -99999.9999 to 99999.9999
Q239 Pitch?: Pitch of the thread. The algebraic
sign differentiates between right-hand and left-
hand threads:
+
–= left-hand thread
Input range -99.9999 to 99.9999
Q203 Workpiece surface coordinate? (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
Q204 2nd set-up clearance? (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999
Q257 Infeed depth for chip breaking?
(incremental): Plunging depth after which the TNC
breaks the chip. No chip breaking if 0 is entered.
Input range 0 to 99999.9999
Q256 Retract dist. for chip breaking?: 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
Q336 Angle for spindle orientation? (absolute):
Angle to which the TNC positions the tool before
the thread cutting process. This allows you to
regroove the thread, if required. Input range
-360.0000 to 360.0000
Q403 RPM factor for retraction?: Factor by
which the TNC increases the spindle speed—
and therefore also the retraction feed rate—when
retracting from the drill hole. Input range 0.0001 to
10. Maximum increase to maximum speed of the
active gear range.
124
= right-hand thread
NC blocks
26 CYCL DEF 209 TAPPING W/ CHIP
BRKG
Q200=2
Q201=-20
Q239=+1
Q203=+25
Q204=50
Q257=5
Q256=+1
Q336=50
Q403=1.5
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 10/2017
option 19)
;SET-UP CLEARANCE
;DEPTH OF THREAD
;THREAD PITCH
;SURFACE COORDINATE
;2ND SET-UP CLEARANCE
;DEPTH FOR CHIP BRKNG
;DIST FOR CHIP BRKNG
;ANGLE OF SPINDLE
;RPM FACTOR