Siemens SINUMERIK 840Di sl - Page 455

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01/2008 Appendix
B Terms
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© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition A-455
Zero/work offset
Specification of a new reference point for a coordinate system through
reference to an existing origin and a → frame.
1. Settable
SINUMERIK 840D: A configurable number of settable work offsets
are available for each CNC axis. The offsets - which are selected
by means of G functions - take effect alternately.
2. External
In addition to all the offsets which define the position of the
workpiece zero, an external work offset can be overlaid by means
of the
− handwheel (DRF offset) or
− from the PLC.
3. Programmable
It is possible to program work offsets for all path and positioning
axes by means of the TRANS statement.
O
OEM
The scope for implementing individual solutions (OEM applications)
for the SINUMERIK 840D has been provided for machine
manufacturers, who wish to create their own operator interface or
integrate process-oriented functions in the control.
Oriented spindle stop
Stops the workpiece spindle with a specified orientation angle, e.g., to
perform an additional machining operation at a specific position.
Oriented tool retraction
RETTOOL: If machining is interrupted (e.g., when a tool breaks), a
program command can be used to retract the tool in a user-specified
orientation by a defined distance.
Override
Manual or programmable control feature, which enables the user to
override programmed feedrates or speeds in order to adapt them to a
specific workpiece or material.
P
Parameters
1. The S7-300 uses two types of parameters:
- Parameters of a STEP 7 instruction A parameter of a STEP 7
instruction is the address of the operand to be edited or a
constant.
- Parameter of a → parameter block
A
parameter of a parameter block determines the behavior of a
module.