Cycle Parameters - HEIDENHAIN TNC 620 User Manual

Fixed Cycles: Tapping / Thread Milling | THREAD MILLING/COUNTERSINKING (Cycle 263, DIN/ISO: G263,
software option 19)

Cycle parameters

Q335 Nominal diameter?: Thread nominal
diameter. Input range 0 to 99999.9999
Q239 Pitch?: 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
Q201 Depth of thread? (incremental): Distance
between workpiece surface and root of thread.
Input range -99999.9999 to 99999.9999
Q356 Countersinking depth? (incremental):
Distance between workpiece surface and tool tip.
Input range -99999.9999 to 99999.9999
Q253 Feed rate for pre-positioning?: Traversing
speed of the tool in mm/min when plunging
into the workpiece, or when retracting from
the workpiece. Input range 0 to 99999.9999
alternatively fmax, FAUTO
Q351 Direction? Climb=+1, Up-cut=-1: Type of
milling operation with M3
+1 = Climb milling
= Up-cut milling (if you enter 0, climb milling is
–1
performed)
Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface. Input
range 0 to 99999.9999
Q357 Safety clearance to the side? (incremental):
Distance between tool tooth and the wall. Input
range 0 to 99999.9999
Q358 Sinking depth at front? (incremental):
Distance between tool point and the top surface
of the workpiece for countersinking at the front of
the tool. Input range -99999.9999 to 99999.9999
Q359 Countersinking offset at front?
(incremental): Distance by which the TNC moves
the tool center away from the center. Input range
0 to 99999.9999
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 10/2017
4
133