Siemens SINUMERIK 840D Operation/Programming Manual page 176

3
Programming with ShopMill
3.3 Creating a sequential control program
Parameters for input of a
blank
3-176
• Work offset (WO) in which the workpiece zero is stored. You can
select the work offset with the "Work Offset" softkey in the tool list
or delete the default setting of the parameter if you do not want to
state a work offset.
• Define the unit of measurement for the program [mm or inch].
• Workpiece corner point 1 (X0, Y0, Z0):
Workpiece corner point 1 is the reference point for the blank
dimensions. It must be entered as an absolute value.
• Workpiece corner point 2 or dimensions
(X1, Y1, Z1 or L, W, H):
Workpiece corner point 2 is opposite workpiece corner point 1. It
must be entered as an absolute value. The deviations are the
length, width and height of the blank.
Workpiece corner points 1 and 2
• Tool axis: The tool length is calculated in the set axis.
• Retraction plane (RP) and safety clearance (SC):
Planes above the workpiece.
During machining the tool travels in rapid traverse from the tool
change point to the return plan 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 onto 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.
The safety clearance must be entered as an incremental value
(without sign).
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
10.04
Workpiece corner point 1 and
dimensions
 Siemens AG, 2004. All rights reserved
3