Spline Group (Splinepath) - Siemens SINUMERIK 840D sl Programming Manual

Special motion commands

4.3 Spline group (SPLINEPATH)

Combine short spline blocks
Spline interpolation can result in short spline blocks, which reduce the path velocity
unnecessarily. The "Combine short spline blocks" function allows you to combine these
blocks such that the resulting block length is sufficient and does not reduce the path velocity.
The function is activated via the channel-specific machine data:
MD20488 $MC_SPLINE_MODE (setting for spline interpolation).
References:
Function Manual, Basic Functions; Continuous-Path Mode, Exact Stop, Look Ahead (B1),
Chapter: Combine short spline blocks
4.3 Spline group (SPLINEPATH)
Function
The axes to be interpolated in the spline group are selected using the
Up to eight path axes can be involved in a spline interpolation grouping.
Note
If
SPLINEPATH
traversed as spline group.
Syntax
The spline group is defined in a separate block:
SPLINEPATH(n,X,Y,Z,...)
Meaning
SPLINEPATH
n
X,Y,Z,...
240
is not explicitly programmed, then the first three axes of the channel are
Command to define a spline group
=1 (fixed value)
Identifier of the path axes to be interpolated in the spline group
SPLINEPATH
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
command.
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