Thread Recutting (Sw 5.3 And Later) - Siemens SINUMERIK 840D Programming Manual

Turning Cycles
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4.9 Thread recutting (SW 5.3 and later)

4.9 Thread recutting (SW 5.3 and later)
SW version 5.3 contains thread cutting cycles
CYCLE97 and CYCLE98 which allow threads to be
recut.
Function
The angular offset of a thread start resulting from
tool breakage or remeasurement is taken into
account and compensated for by the "Thread recut"
function.
This function can be executed in JOG mode in the
Machine operating area.
The cycles calculate an additional offset angle for
each thread, which is applied in addition to the
programmed starting point offset, from the data
stored in the thread start during synchronization.
Preconditions
The channel in which the thread recutting program must
be executed is already selected; the relevant axes must
already be referenced. The channel is in the Reset
state, the spindle is stationary.
Sequence of operations
•
Select JOG in "Machine" operating area.
•
Select softkey "Recut thread"
Í Open screenform for this function.
•
Thread into thread start using the threading tool.
•
Select softkey "Sync Point" when the cutting tool is
positioned exactly in the thread start.
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
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