Siemens SINUMERIK 802D sl Programming And Operating Manual page 82

Manual machining
5.4 Manual machining using cycles (functions)
Execute thread recut
The following requirements must be fulfilled before you can recut a thread:
● Appropriate values must already have been entered in the "Thread Cutting" screen form
● The screen above is displayed.
● The spindle must be stationary (switched off) and must already have been synchronized,
● Now use the handwheels to traverse the axes until the thread cutting tool can be
● Carefully introduce the tool into the thread. The "Axis position" shown on the screen must
● Press the softkey "Accept angle". The current spindle angle is now converted into the
● Using the handwheels, move the axes into a position from which the start of the thread
● Press the softkey "OK" and the following screen appears:
The rest of the thread cutting process is exactly the same as that described for "Manual
thread cutting".
The only difference is that thread cutting is not started with the marker pulse from the spindle
encoder but with the angle that was calculated in the previous screen for "thread repair"
(thread recutting) as the "start angle offset".
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at this point.
in other words, it must have been turned through at least one full revolution since the
controller was last powered up. Otherwise, an error message appears when the thread
angle is accepted.
threaded into the existing thread.
be between the values for "Thread initial p." and "Thread end point".
appropriate starting angle offset for thread cutting. The starting angle that is now
displayed corresponds to the angle that will subsequently be used as the starting angle
offset for machining a right-hand or left-hand thread.
can be approached safely.
Figure 5-42 Execute thread recut
Programming and Operating Manual, 06/2009, 6FC5398-6CP10-1BA0
Manual Machine Plus Turning