5
ShopTurn Functions 08/2005
5.13 Pro
rammin
the a
roach/return c
cle
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♥ Siemens AG, 2005. All rights reserved
5-326 SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
5.13 Programming the approach/return cycle
If you wish to reduce the approach to or return from a machining cycle
or solve a complex geometric situation on approach/return, you can
create a special cycle. In this case, ShopTurn ignores the standard
approach/return strategy provided (see Section "Machining cycle
approach and return").
You can insert the approach/return cycle between any step-chain
program blocks, but not within chained blocks.
The starting point for the approach/return cycle is the safety clearance
approached after the last machining operation.
If you want to perform a tool change, you can move the tool through a
total of 3 positions (P1 to P3) to the tool change point and through a
further 3 positions (P4 to P6) to the next starting point.
If the tool does not need to be changed, however, you have a total of
6 positions available for the approach to the next starting position.
If 3 to 6 positions are not sufficient for the approach/return, you can
call the cycle several times in succession to program further positions.
Caution
Note that the tool will move from the last position programmed in the
approach/return cycle directly to the starting point for the next
machining operation.
Approach/
Return
îš¾ Press the "Strai. Circle" and "Approach/Return" soft keys.
Parameters Description Unit
F1 Feedrate for approach to first position
Alternative to rapid traverse
mm/min
X1
1st position (inc) or 1st position ¬ (abs)
mm
Z1 1st position (abs or inc) mm
F2 Feedrate for approach to second position
Alternative to rapid traverse
mm/min
X2
2. Position (inc) or 2nd position ¬ (abs)
mm
Z2 2. position (abs or inc) mm
F3 Feedrate for approach to third position
Alternative to rapid traverse
mm/min
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