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
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Does not support H-functions
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Does not support changes of flags like G51, G52, G40 and so on, these changes are ignored
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Requires 3D-Mode
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Can be turned on and off from G-Code using G38/G39
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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.
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InOut:
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Scope
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Name
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Type
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Comment
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Input
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bExecute
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BOOL
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Execution starts on the rising edge.
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poqDataIn
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POINTER TO SMC_OUTQUEUE
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Input path queue
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nSizeOutQueue
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UDINT
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Size of the data buffer pbyBufferOutQueue in bytes.
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pbyBufferOutQueue
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POINTER TO ARRAY [0..0] OF SMC_GEOINFO
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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.
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eMode
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SMC_SMOOTHBSPLINE_MODE
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The element type applied for the smoothing of the axes.
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wFeatureFlag
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WORD
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The feature bit (0..31) used for smoothing (controlled by G38/G39)
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Output
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bDone
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BOOL
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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
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bBusy
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BOOL
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TRUE, while execution of function block is not finished.
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bError
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BOOL
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Signals, that an error has occurred within the function block.
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wErrorID
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SMC_ERROR
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Error identification.
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poqDataOut
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POINTER TO SMC_OUTQUEUE
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The queue for the output path
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