Siemens SINUMERIK 840DE Programming Manual page 483

Editor
The editor is used to create, modify, add to, compress, and insert programs/texts/program
blocks.
Electronic handwheel
The electronic handwheels can be used to simultaneously traverse selected axes manually.
The meaning of the lines on the handwheels is defined by zero offset external increment
weighting.
Exact stop
With a programmed exact stop instruction, the position stated in a block is approached
precisely and very slowly, if necessary. In order to reduce the approach time, -> exact stop
limits are defined for rapid traverse and feed.
Exact stop limit
When all path axes reach their exact stop limits, the control responds as if it had reached its
destination point precisely. The -> parts program continues execution at the next block.
Fast retraction from contour
When an interrupt arrives a motion can be initiated via the CNC machining program, which
allows the tool to be quickly retracted from the workpiece contour currently being machined.
The retraction angle and the distance retracted can also be parameterized. An interrupt
routine can also be executed following the fast retraction of the tool. (SINUMERIK 840D).
Feed override
The programmed velocity is overridden by the current velocity setting via the machine control
panel or by the PLC (0-200 %). The feedrate can also be corrected by a programmable
percentage factor (1 - 200%) in the machining program.
Finished-part contour
Contour of the finished workpiece. See -> blank.
Fixed machine point
A point defined uniquely by the machine tool, e.g., the reference point.
Fixed-point approach
Machine tools can approach fixed points such as a tool change point, loading point, pallet
change point, etc., in a defined way. The coordinates of these points are stored in the
control. Where possible, the control moves these axes in -> rapid traverse.
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Glossary
Glossary-7