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Re-working A Thread - Siemens SINUMERIK 840DE Operation & Programming Manual

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5
Turning with Cycles
5.2 Turning cycles in CYCLE mode

5.2.3 Re-working a thread

Precondition
Face
Thread
thread
Sync
point
Acc. left-h.
thread
Acc. right-h.
thread
5-88
Function
The angular offset of a thread caused by tool breakage or re-
measurement is taken into account and compensated by the
"synchronization point" function.
Sequence of operations
The spindle is stationary.
Insert the thread cutting tool along the thread.
Press the "Sync Point" soft key in the appropriate thread screen form
(thread face, longitudinal, or taper) when the threading tool is precisely
in the thread turn.
Select the appropriate soft key to choose when the thread is left-
handed or right-handed.
By selecting the soft key labeled "Back", you can return to the higher-
level soft key menu without activating the "Sync point" function.
Then retract the thread cutting tool such that the reference point can
be approached without collision.
Press NC start to activate the thread cycle.
When the thread cycle is started, the angular offset is taken into
account.
Entering an insertion depth E (depth already reached in the previous
machining operation) avoids unnecessary noncuts during thread
reworking.
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/810D Operator's Guide ManualTurn (BAM) – 08.02 Edition
5
08.02

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