HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 54)

55
Cycles
for
Machining
Holes
and
Threads
OUTSIDE THREAD MILLING (267)
Pre-position over the hole center with R0
CYCL DEF: Select Cycle 267 OUTSIDE THREAD MLLNG
Nominal diameter of thread: Q335
Thread pitch: Q239
The algebraic sign determines the thread direction:
• Right-hand thread: +
• Left-hand thread: –
Hole depth: Distance from top of workpiece to bottom of hole: Q201
Number of threads per step: Q355
Feed rate for pre-positioning: Q253
Type of milling: Q351
• Climb: +1
• Up-cut: –1
Set-up clearance: Q200
Sinking depth at front: Q358
Countersinking offset at front: Q359
Workpiece surface coordinate: Q203
2nd set-up clearance: Q204
Feed rate for countersinking: Q254
Feed rate for milling: Q207
X
Z
Q203
Q253
Q201
Q204 Q200
Q239
Q335
X
Y
Q207
Q335