Selection Of Crc/Tnrc - Siemens SINUMERIK 880 Programming Manual

01.93
10 Cutter Radius Compensation (CRC), Tool
Nose Radius Compensation (TNRC)
All stop positions for single blocks are marked S. The relevant block number is stated in
brackets.
Contour elements are marked by a heavy line
The diagrams are shown with G42. In the case of programs with G41, the angle transition is
=360°– . The behaviour of the cutter radius compensation complies with the recalculated
angle transition .
10.1

Selection of CRC/TNRC

The compensation mode is selected in the defined plane with preparatory functions G41/G42
and offset number D.
The compensation is effected to the left of the workpiece contour (in the traversing direction)
with G41 and to the right of the workpiece contour with G42. When selecting CRC/TNRC, two
or three program blocks are always read in for calculating the point of intersection.
In the block following the selection blocks, a block start vector (length R) is created perpendi-
cular to the programmed path.
The compensation mode can only be selected in a program block with
Tool number D0 is assigned the compensation value 0;
The diagrams below show the compensation selected for various approach angles.
Straight line/straight line
R
N05
S
(N05)
G42
Selection of compensation mode for > 180°
© Siemens AG 1991 All Rights Reserved
SINUMERIK 880, (PG)
10 Cutter Radius Compensation (CRC), Tool Nose Radius Compensation (TNRC)
(
G00 or G01.
no compensation is selected.
>180°
Straight line/circular arc
N10
6ZB5 410-0HD02
10.1 Selection of CRC/TNRC
).
R
N05
N10
S
(N05)
G42
10–1