Machining Plane, Milling Direction, Retraction Plane, Safe Clearance And Feedrate (Pl, Rp, Sc, F) - Siemens SINUMERIK 828D Operating Manual

6.7 Machining plane, milling direction, retraction plane, safe clearance and feedrate (PL, RP, SC, F)

Parameter Description
ZB Machining dimension (abs) or machining dimension in relation to ZA (inc)
XA Outside diameter – (only for tube and cylinder)
XI Inside diameter (abs) or inside wall thickness (inc) – (only for tube)
N Number of edges – (only for polygon)
SW or L Width across flats or edge length – (only for polygon)
W Width of the blank - (only for centered cuboid)
L Length of the blank - (only for centered cuboid)
6.7 Machining plane, milling direction, retraction plane, safe clearance and
feedrate (PL, RP, SC, F)
In the program header, cycle input screens have general parameters that are always
repeated. These differ between G code programs and ShopMill programs.
You will find the following parameters in every input screen for a cycle in a G code program.
Parameter Description
PL Each input screen has a selection box for the planes, if the planes have not been
specified by NC machine data.
Machining plane:
G17 (XY)
•
G18 (ZX)
•
G19 (YZ)
•
Milling direction When milling, the machining direction of rotation (climbing or conventional) and the
spindle direction of rotation in the tool list are taken into consideration. The pocket is
then machined in a clockwise or counterclockwise direction.
During path milling, the programmed contour direction determines the machining
direction.
RP Retraction plane (abs)
During machining the tool travels in rapid traverse from the tool change point to the
return plane and then to the safety clearance. The machining feedrate is activated at
this level. When the machining operation is finished, the tool travels at machining
feedrate away from the workpiece to the safety clearance level. It travels 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.
Normally, reference point Z0 and retraction plane RP have different values. The cycle
assumes that the retraction plane is in front of the reference point.
HMI sl Milling
Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
Creating G code program
Unit
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