Working with a B axis (only 840D sl) 
  15.1 Lathes with B axis 
Turning 
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1 
727 
Turning 
Alignment angles allow you to perform a wide range of different turning operations (for 
example, internal and external longitudinal machining, surface machining with a main spindle 
and counterspindle, residual material) without changing the tool. 
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Display of the B axis 
The B axis is displayed in the following windows: 
●  Axis position display in actual value window 
●  In the “Positioning” window to position axes in manual operation 
●  You can display the B axis in the zero offset lists using the "Zero offset" softkey and you 
can also define the offset.