NUM 1020 - Interpolation Feed Rate

Polynomial Interpolation
en-938872/2 6 - 5
6
Example:
Without angular offset
G1 X20 Y0 /50/-180/240/-110
With angular offset ED..
G1 X20 /20/0/0/0 Y0 /50/-180/240/-110
Radius correction using polynomial interpolation
With radius correction (G41 or G42), the normal tool offset is not carried out unless
both axes of the interpolation plane are programmed.
Throughout interpolation (from the start point to the end point), the tool is held normal
to the curve in the interpolation plane.
Consecutive polynomial curves must be tangent. If a curve not tangent with another
polynomial curve (line or circle) is sequenced, the connection is made by a connection
circle that positions the tool normal to the new curve at its start point.
When two curves are sequenced and the tool diameter is too large to be positioned
on the normal to one of the programmed paths (connection radius smaller than the
tool radius or path inaccessible), the system nevertheless applies the path continuity
rules, which results in undesirable material removal.
6.2.3 Interpolation Feed rate
The curve segmenting step is directly related to the feed rate programmed:
- in G93 (V/L) and G94 (mm/min), the segmenting step is computed so as to be
executed in 10 milliseconds (ms) if the sampling period is less than 5 ms,
- in G95 (mm/revolution), the segmenting step is equal to the programmed feed per
revolution.