SMC_SmoothBSpline (FB)¶

FUNCTION_BLOCK FINAL SMC_SmoothBSpline

Smoothes segments of consecutive G1 elements with a B-Spline of fifth degree. Each segment of at least 5 consecutive G1 elements of non-zero length is replaced by splines. The start and end positions of the G1 elements serve as control points of the B-spline that is created. Only the start position of the segment and the end position are interpolated exactly.

Each segment of n >= 5 G1 elements is replaced by n-5 polynomials.

Note

Does not support H-functions
Does not support changes of flags like G51, G52, G40 and so on, these changes are ignored
Requires 3D-Mode
Can be turned on and off from G-Code using G38/G39
A spline always contains the same tool correction information (i.e. lengths and diameter) as the first of the segments that it replaces.

Additional axis: First the values of the additional axis are also converted to a B-spline. For the linear axis (P,Q,U,V,W) only the positions at the end of each polynom are stored in SMC_GeoInfo. For the smoothed axis (A, B, C) the slope is also stored.

InOut:

Scope	Name	Type	Comment
Input	`bExecute`	`BOOL`	Execution starts on the rising edge.
	`poqDataIn`	POINTER TO SMC_OUTQUEUE	Input path queue
	`nSizeOutQueue`	`UDINT`	Size of the data buffer `pbyBufferOutQueue` in bytes.
	`pbyBufferOutQueue`	POINTER TO ARRAY [0..0] OF SMC_GEOINFO	Points to the first byte of the memory area being allocated for the SMC_OUTQUEUE-structure. This area must be at least as big as defined in `nSizeOutQueue`. Typically the allocation of the memory buffer is done within the declaration part of the IEC-program by defining an array of SMC_GeoInfo (ExampleBuf: `ARRAY[1..50] OF SMC_GEOINFO` for a buffer which can hold 50 path` elements). After predefining the value it may be modified during a reset only.
	`eMode`	SMC_SMOOTHBSPLINE_MODE	The element type applied for the smoothing of the axes.
	`wFeatureFlag`	`WORD`	The feature bit (0..31) used for smoothing (controlled by G38/G39)
Output	`bDone`	`BOOL`	Will be set to `TRUE` as soon as the input data from `poqDataIn` has been ` processed completely. Thereafter, the module will not perform any further actions
	`bBusy`	`BOOL`	`TRUE`, while execution of function block is not finished.
	`bError`	`BOOL`	Signals, that an error has occurred within the function block.
	`wErrorID`	`SMC_ERROR`	Error identification.
	`poqDataOut`	POINTER TO SMC_OUTQUEUE	The queue for the output path

Structure:

DoBeforeLeave (Action)