Siemens Sinumerik 802D sl Programming Manual page 173

04.07
E
Editor
Electronic handwheel
Exact stop
Exact stop limit
External zero offset
F
Fast retraction from
contour
Feedforward control,
dynamic
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SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning - - 04.07 Edition
The editor makes it possible to create, modify, extend, join and
insert programs/texts/program blocks.
Electronic handwheels can be used to traverse the selected axes
simultaneously in manual mode. The handwheel clicks are analyzed
by the increment analyzer.
When an exact stop is programmed, a position specified in the block
is approached accurately and, where appropriate, very slowly. In
order to reduce the approach time, --> exact stop limits are defined
for
rapid traverse and feed.
When all path axes reach their exact stop limits, the control
responds as if it had reached its destination point precisely. The -->
part program continues execution at the next block.
A zero offset specified by the --> PLC.
When an interrupt is received, it is possible to initiate a motion via
the CNC machining program which allows the tool to be retracted
quickly from the workpiece contour currently being machined. The
retraction angle and the distance retracted can also be
parameterized. An interrupt routine can be executed after the rapid
retraction. (SINUMERIK FM--NC, 810D, 840D).
Contour inaccuracies resulting from following errors can be almost
completely eliminated by the dynamic, acceleration--dependent
feedforward control function. Feedforward control ensures an
excellent degree of machining accuracy even at high tool path
velocities. Feedforward control can only be selected or deselected
for all axes together via the part program.
Terms
B-173