Manual Thread Tapping - Siemens SINUMERIK 808D Programming And Operating Manual

Manual machining
3.4 Manual machining using cycles (functions)
3.4.4

Manual thread tapping

Functionality
The "Manual thread tapping" function is designed to produce internal threads in the turning
center, either with a compensating chuck or in a rigid tapping operation.
Before you start the cycle, you must position the tool in such a way that it can approach the
programmed Z initial position without risk of collision. The function itself will position the tool
on the center of rotation.
The machining feedrate is calculated from the programmed spindle speed and the thread
pitch. This feedrate might not be the same as the programmed feedrate!
If you have selected "cutting rate" as the spindle type, the value set for the maximum spindle
speed with G96 or the value for the maximum spindle speed is applied for thread tapping.
(because the thread is tapped in the turning center, i.e. X=0)
Notice: If "Time feed" is selected in the "Machining technology data" screen, for the sake of
the pitch to be calculated correctly, the spindle override weighting must be set to "100%".
Otherwise, the tapping tool or workpiece may be damaged!!
->Prior to pressing <CYCLE START>, check that the spindle override weighting is set to
100%!
Operating sequences
You can access the drilling cycle overview by pressing the softkey "Drill." in the basic screen
for "Manual Machine Plus".
Figure 3-22
46
DANGER
Drilling cycle overview - "Tapping" selected
Programming and Operating Manual, 12/2012, 6FC5398-3DP10-0BA0
Manual Machine Plus (Turning)