Siemens SINUMERIK 840D sl Operating Manual page 260

Creating a ShopMill program
7.5 Program header
Parameter
HA
- not for "Cuboid" and
"Without" blanks
HI
- not for "Cuboid" and
"Without" blanks
PL
Retraction plane RP
Safety clearance SC:
Machining direction
Retraction position
pattern
See also
Program header setting, "Clamping" (Page 623)
260
Description
Initial dimension
Final dimension (abs) or final dimension in relation to HA (inc)
Machining plane
G17 (XY)
G18 (ZX)
G19 (YZ)
Note: The plane settings can already be defined. Ask the machine manufacturer in
order that the selection box is available.
Planes above the workpiece.
During machining, the tool travels in rapid traverse from the tool change point to the
return plane (RP) and then to the safety clearance (SC). The machining feedrate is
activated at this height. When the machining operation is finished, the tool traverses
at the machining feedrate away from the workpiece to the safety clearance height. It
traverses from the safety clearance to the retraction plane and then to the tool
change point in rapid traverse. The retraction plane is entered as an absolute value.
The safety clearance must be entered as an incremental value (without sign).
When machining a pocket, a longitudinal slot or a spigot, ShopMill takes the
machining direction (down-cut or up-cut) and the spindle direction in the tool list into
account. The pocket is then machined in a clockwise or counterclockwise direction.
During path milling, the programmed contour direction determines the machining
direction.
Optimized
•
When machining with optimized retraction, the tool travels across the workpiece
at the machining feedrate depending on the contour and with a safety clearance
(SC).
To RP
•
When retracting to RP, the tool is retracted to the retraction plane when the
machining step is complete and infeeds at the new position. Collisions with
workpiece obstacles are thus prevented when the tool is retracted and fed in,
e.g. when holes in pockets or grooves are machined at different levels and
positions.
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
Unit
mm
mm
Milling