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ShopTurn Functions  08/2005 
5.3 Turnin
 
 
5
 
♥ Siemens AG, 2005. All rights reserved. 
5-202  SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition 
 
 
Undercut > 
 
¾  Press the "Turning" and "Undercut" soft keys. 
 
Undercut 
thread DIN 
 -or- 
Undercut 
thread 
 
¾  Press the "Undercut thread DIN" or "Undercut thread" soft key. 
 
 
Parameters  Description  Unit 
 
T, D, F, S, V  See Sec. "Creating program blocks".   
 
Machining 
type
 
Roughing 
 Finishing 
+  Complete machining 
 
 
Position  Position of thread undercut: 
 
       
 
 
P  Select the pitch from the preset DIN table or enter – (for "Thread undercut DIN" only) mm/rev 
 
X0 
Reference point ¬ (abs) 
mm 
 
Z0  Reference point (abs)  mm 
 
X1 
Allowance in X direction ¬ (abs) or  
Allowance in X direction (inc) – (for "Thread undercut" only)
 
mm 
 
Z1  Allowance in Z direction (abs or inc) – (for "Thread undercut" only)  mm 
 
R1, R2  Radius1, Radius2 (inc) – (for "Thread undercut" only)  mm 
 
α 
Plunge angle
  Degrees
 
V 
Cross-feed X ¬ (abs) or cross-feed X (inc) 
mm 
 
D  Infeed (inc) – (for roughing only)  mm 
 
U  Contour-parallel finishing allowance in X and Z direction (inc) – (roughing only) – 
(alternative to UX and UZ)
 
mm 
 
UX  Finishing allowance in X direction (inc) – (roughing only) – (alternative to U)  mm 
 
UZ  Finishing allowance in Z direction (inc) – (roughing only) – (alternative to U)  mm