Generating Program Blocks - Siemens SINUMERIK 840D sl Operating Manual

Parameter
ZRA
ZRI
Tailstock
- not for retraction: "No"
XRR
- not for retraction: "No"
S1
- not for retraction: "No"
PL
SC
Machining direction
Retraction position pat‐
tern
9.7

Generating program blocks

After a new program is created and the program header is filled out, define the individual
machining steps in program blocks that are necessary to machine the workpiece.
Milling
Operating Manual, 05/2017, A5E40868956
Description
Retraction plane Z front (abs) or
retraction plane Z referred to HA (inc)
Retraction plane Z rear
● No
No turning cycles can be used.
● Yes
● No
Retraction plane tailstock – (only "Yes" for tailstock)
Speed limit for G96 when turning
Machining plane for milling:
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.
Machining plane when turning:
G18 (ZX)
The safety clearance defines how close the tool can approach the workpiece in rapid
traverse.
Note
Enter the safety clearance without sign into the incremental dimension.
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 di‐
rection.
● 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.
Creating a ShopMill program
9.7 Generating program blocks
Unit
285