Siemens SINUMERIK 828D Function Manual page 1478

W1: Tool offset
18.5 Tool radius compensation 2D (TRC)
• When DISR=5, the radius of SAR contour=20; that of the tool center point path=5
• After the circle block, the retraction movement leads from Z8 to Z20 and the movement is parallel to the X­Y
plane up to the end point at X70 Y0.
Figure 18-22 Contour example 2
Part program:
$TC_DP1[1,1]=120
$TC_DP6[1,1]=10
N10 G0 X0 Y0 Z20 G64 D1 T1 OFFN = 5
N20 G41 G247 G341 Z0 DISCL = AC(7) DISR = 10 F1500 FAD=200
N30 G1 X30 Y-10
N40 X40 Z2
N50 X50
N60 G248 G340 X70 Y0 Z20 DISCL = 6 DISR = 5 G40 F10000
N70 X80 Y0
N80 M 30
Note
The contour generated in this way is modified by tool radius compensation, which is
activated in the SAR approach block and deactivated in the SAR retraction block.
The tool radius compensation allows for an effective radius of 15, which is the sum of the tool
radius (10) and the contour offset (5). The resulting radius of the tool center path in the
approach block is therefore 10, and 5 in the retraction block.
1478
;Tool definition T1/D1
; Radius
(P0app)
(P3app)
(P4app)
(P4ret)
(P3ret)
(P0ret)
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions