Siemens SINUMERIK 802D sl Programming Manual page 146

Enhanced Level Commands
4.8 Program support functions (2)
Siemens mode
The identifiers for radius and chamfer are defined by machine data in Siemens
mode. This prevents the occurrence of name conflicts. A comma must not be
programmed before the identifier for radius or chamfer. The relevant MD are as
follows:
MD for radius: $MN_RADIUS_NAME
MD for chamfer: $MN_CHAMFER_NAME
Plane selection
It is only possible to carry out chamfering and corner rounding in the plane speci-
fied via plane selection (G17, G18, or G19). Parallel axescannot be treated with-
these functions.
Switching planes
A chamfering or corner rounding block can be inserted only for move commands
which are performed in the same plane. In a block that comes immediately after
plane switching (G17, G18, or G19 is specified), neither chamfering nor corner
rounding can be specified.
Going to the next block
A block that specifies a move command using linear interpolation (G01) or circular
interpolation (G02 or G03) must follow a block specifying chamfering or corner
rounding. An alarm is issued whenever the next block does not contain these spe-
cifications.
Coordinate system
Neither chamfering nor corner rounding can be applied to a block that immediately
succeds a change of the coordinate system (G92, or G52 to G59) or a specification
of a return to the reference position (G28 to G30) .
Travel distance 0
Assuming the angle between the two straight lines is within +1, the chamfering or
corner rounding block is regarded as having a travel distance of zero when two li-
near interpolation operations are performed. Assuming the angle between the
straight line and the tangent to the arc at the intersection is within +1, the corner
rounding block is regarded as having a travel distance of zero when linear interpo-
lation and circular interpolation operations are performed. Assuming the angle bet-
ween the tangents to the arcs at the intersection is within +1, the corner rounding
block is regarded as having a travel distance of zero when two circular interpolation
operations are carried out.
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SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
© Siemens AG 2007 All rights reserved
04.07