Effect With Negative Compensation Values - Siemens SINUMERIK 880 Programming Manual

10 Cutter Radius Compensation (CRC), Tool Nose Radius Compensation (TNRC) 05.91

10.11 Effect with negative compensation values

10.11 Effect with negative compensation values
If the compensation value is negative, cutter radius P4, a compensated path corresponding to
G42 with a positive compensation value is implemented with G41, i.e. an analog internal con-
tour is followed instead of the programmed external contour, and vice versa.
In the cutter centre path shown in the diagram below (a) a positive compensation value has
been entered. A negative compensation value in conjunction with the same machining program
will effect the machining shown on the right of the diagram (b).
(a) (b)
If the program is written as shown in (b) with a positive compensation value, a negative com-
pensation value will effect machining as shown in (a). The two operations are distinguished by
entering a positive or negative compensation value.
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SINUMERIK 880, (PG)