Feed Reduction With Corner Deceleration (Fendnorm, G62, G621) - Siemens SINUMERIK 828D Programming Manual

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

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

/FBFA/ "Function Description ISO Dialects"

Significance

G62 only applies to inside corners with

● active tool radius offset

● active continuous-path mode

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

Job planning

Programming Manual, 07/2010, 6FC5398-2BP40-0BA0

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

deactivates the function of the automatic corner override.

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

Special Motion Commands

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