HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 50)

51
Cycles
for
Machining
Holes
and
Threads
THREAD MILLING (262)
Pre-position above the hole center with R0
CYCL DEF: Select Cycle 262 THREAD MILLING
Nominal diameter of the thread: Q335
Thread pitch: Q239
The algebraic sign determines the thread direction:
• Right-hand thread: +
• Left-hand thread: –
Thread depth: Distance from top of workpiece to thread
termination: 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
Workpiece surface coordinate: Q203
2nd set-up clearance: Q204
Feed rate for milling: Q207
X
Z
Q203
Q253
Q239
Q201
Q204 Q200
X
Y
Q207
Q335