Feed Reduction With Corner Deceleration (Fendnorm, G62, G621) - Siemens Sinumerik 840D sl Programming Manual

Special Motion Commands

4.10 Feed reduction with corner deceleration (FENDNORM, G62, G621)

4.10 Feed reduction with corner deceleration (FENDNORM, G62, G621)
Function
With automatic corner deceleration the feed rate is reduced according to a bell curve before
reaching the corner. It is also possible to parameterize the extent of the tool behavior relevant
to machining via setting data. These are:
• Start and end of feed rate reduction
• Override with which the feed rate is reduced
• Detection of a relevant corner
Relevant corners are those whose inside angle is less than the corner parameterized in the
setting data.
Default value FENDNORM deactivates the function of the automatic corner override.
References:
/FBFA/ "Function Description ISO Dialects"
Syntax
FENDNORM
G62 G41
G621
Significance
FENDNORM
G62
G621
G62 only applies to inside corners with
• active tool radius offset G41, G42 and
• active continuous-path mode G64, G641
The corner is approached at a reduced feed rate resulting from:
F * (override for feed rate reduction) * feed rate override
The maximum possible feed rate reduction is attained at the precise point where the tool is to
change directions at the corner, with reference to the center path.
G621 applies analogously with G62 at each corner of the axes defined by FGROUP.
284
Automatic corner deceleration OFF
Corner deceleration at inside corners when tool radius offset is active
Corner deceleration at all corners when tool radius offset is active
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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