HEIDENHAIN TNC 426 (280 476) Pilot User Manual
Page 51

52
Cycles
for
Machining
Holes
and
Threads
THREAD MILLING AND COUNTERSINKING (263)
Pre-position above the hole center with R0
CYCL DEF: Select Cycle 263 THREAD MILLING AND
COUNTERSINKING
Nominal diameter of thread: Q335
Thread pitch: Q239
The algebraic sign determines the direction of the thread:
Right-hand thread: +
Left-hand thread:
Thread depth: Distance from top of workpiece to thread
termination: Q201
Countersinking depth: Distance from workpiece surface to bottom
of hole: Q356
Feed rate for pre-positioning: Q253
Type of milling: Q351
Climb: +1
Up-cut: 1
Set-up clearance: Q200
Lateral set-up clearance: Q357
Sinking depth at front: Q358
Countersinking offset at front: Q359
Workpiece surface coordinate: Q203
2nd set-up clearance: Q204
Feed rate for counterboring: Q254
Feed rate for milling: Q207
X
Z
Q203
Q239
Q201
Q204
Q200
Q253
Q356
X
Z
Q359
Q357
Q358