Machining Continuation On Full Circles; Automatically Generated Contour Elements; Boundary Conditions For Standard Functions; Axis Replacement - Siemens SINUMERIK 840D sl Function Manual

Special functions

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Machining continuation on full circles

In full circles, the block starting and end points coincide at one contour point. As no clear

differentiation is possible in this case, one always starts from the block start point during

machining continuation on this kind of a contour point. The first part program block following

retrace support is then the circular block.

A contour point just before the block end point of the circular block must be selected to avoid

traversing the circular block after the machining continuation.

The automatic generation of non-linear / non-circular contour elements by the NC takes

place, for example, when programming the following NC functions in the part program:

Tool radius compensation

For reverse / forward travel as part of RESU these contour elements can be replaced by

straight lines between the start and end of the block.

As long as RESU is active, the two geometry axes of the RESU working plane (e.g. the 1st

and 2nd geometry axes of the channel) must not be transferred to another channel via axis

replacement ( RELEASE(x)/GET(x)).

The RESU activity:

Special Functions

Function Manual, 09/2011, 6FC5397-2BP40-2BA0

with the part program command CC_PREPRE(1)

the program end

with the part program command CC_PREPRE(-1)

TE7: Continue machining - retrace support

15.9 Boundary conditions

Sinumerik 840de sl