Polynomial contouring (G61/G261/G260)

G61                                        Polynomial contouring (at block end)                  (non-modal)

...or for polynomial contouring across several blocks:

G261                                       Select polynomial contouring (at block end)   (modal)

G260                                       Deselect polynomial contouring                         (modal)

Polynomial contouring is the constant curvature and constant direction connection between two motion blocks. For this purpose, the originally programmed motion blocks are shortened. A contouring curve is added between the blocks. This process permits contouring between the transitions straight line - straight line, straight line - circle and circle – circle (see Figure below). It is not restricted to a particular plane but allows contouring between any number of curves located in space.

Motion blocks without motion path are not considered here. (See Relevant block length).

Examples of polynomial contouring
Examples of polynomial contouring

The following contouring types are available:

Depending on the contouring type, different conditions may be specified. The parameters remain valid until the contouring process is fully executed. If the contouring parameters between the pre-block and post-block are changed, the change becomes effective with the next contouring operation.