Overview

Polygon functions (G01 blocks) generally do not consist of continuously differentiable segment transitions, but contain „kinks“ in the contour. Instantaneous velocity changes are generally not possible. To avoid having to reduce the path velocity to 0 at such transitions, the contour can be modified through blending at the segment transition.

	Design	Supported segment transitions	Acceleration of axis components	Max. tolerance	Adaptive tolerance radius	Command
Circular smoothing	Interpreter	Straight line/straight line	Step change in acceleration (value parameterizable via the C1 factor)	1/2 of the input or output segment	no	paramCircularSmoothing(...)
Parabola smoothing	NC kernel	Straight line/straight line	Step change in acceleration to a constant level (value parameterizable via the C1 factor)	1/3 of the input or output segment	can be selected	paramVertexSmoothing(...)
Bi-quad smoothing	NC kernel	Straight line/straight line	Constant acceleration - the acceleration is 0 at the entry and exit - no intermediate point required	1/3 of the input or output segment	can be selected	paramVertexSmoothing(...)
Bezier blending function of the 3rd order	NC kernel	all	Step change in acceleration to a linear level (can be parameterized with the C1 factor)	1/3 of the input or output segment	can be selected, effective for straight line transitions	paramVertexSmoothing(...)
Bezier blending function of the 5th order	NC kernel	all	Constant acceleration - the acceleration is 0 at the entry and exit - no intermediate point required	1/3 of the input or output segment	can be selected, effective for straight line transitions	paramVertexSmoothing(...)
'Old' Bezier blending	NC kernel	all	Constant acceleration - the acceleration is 0 at the entry, the exit and at the symmetric intermediate point	1/4 of the input or output segment	no	paramSplineSmoothing(...) paramVertexSmoothing(...)

Blending takes effect from the transition between the subsequent two segments.

	Principle of blending The radius of the tolerance sphere can be altered at any time within the NC program, and can be switched off again by setting the radius to 0. Blending remains active until the next reset of the interpreter or TwinCAT restart.