Straight - Siemens SINUMERIK 840D sl Operation/Programming Manual

ShopTurn Functions
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5.1 Straight or circular path movements

5.1.2 Straight

Radius compensation
5-158
When you want to program a straight line in Cartesian coordinates,
you can use the "Straight" function.
The tool moves across a straight line at the programmed feedrate or
at rapid traverse from its current position to the programmed end
position.
Alternately you can implement the straight line with radius
compensation. The radius compensation acts modally; therefore, you
must deactivate the radius compensation again when you want to
traverse without radius compensation. If several straight line blocks
with radius compensation are programmed sequentially, you may
select radius compensation only in the first program block.
For the first straight line with radius compensation, the tool
approaches the starting point without radius compensation and the
end point with radius compensation, i.e. if a vertical path is
programmed, a slope will be traversed. The compensation does not
act over the entire traverse path until the second programmed straight
line with radius compensation. The reverse occurs when radius
compensation is deactivated.
Programmed
path
Travel path
First straight line with radius compensation First straight line with deactivated radius
If you want to prevent deviation from the programmed path, you can
program the first straight line with radius compensation or with
deactivated radius compensation at a distance from the workpiece.
Programming without coordinate data is not possible.
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
08/2005
Programmed
Travel path
compensation
♥ Siemens AG, 2005. All rights reserved
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path