Siemens SINUMERIK 840D sl, Руководство по эксплуатации функций

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Detailed Description
2.4 Tool radius compensation 2D (TRC)
Basic logic functions: Tool Offset (W1)
72
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Part program:
$TC_DP1[1,1]=120
;Tool definition T1/D1
$TC_DP6[1,1]=10
; Radius
N10 G0 X0 Y0 Z30
N20 G247 G341 G42 NORM D1 T1 Z0 FAD=1000 F=2000 DISCL=5 DISR=10
N30 X40
N40 X100
N50 Y-30
...
Example 2
The following conditions must be true for approach:
•
Smooth approach is activated in block
N20
•
Approach movement performed with quadrant (
G247
)
•
Approach direction not programmed,
G140
is valid, i.e., because TRC is active (
G41
), the
contour is approached from the left
•
Contour offset
OFFN=5
(
N10
)
•
Current tool radius=10, and so the effective compensation radius for TRC=15; the radius
of the SAR contour is thus equal to 25, with the result that the radius of the tool center
path is equal to
DISR=10
•
The end point of the circle is obtained from
N30
, since only the Z position is programmed
in
N20
•
Infeed movement
–
From Z20 to Z7 (
DISCL=AC(7)
) with rapid traverse
– Then on to Z0 with
FAD=200
– Approach circle in X-Y-plane and following blocks with
F1500
(In order that this velocity becomes effective in the following blocks, the active G-code
G0
in
N30
must be overwritten with
G1
. Otherwise, the contour would continue to be
machined with
G0
.)
The following conditions must be true for retraction:
•
Smooth retraction is activated in block
N60
•
Retraction movement performed with quadrant (
G248
) and helix (
G340
)
•
FAD
not programmed, since irrelevant for
G340
•
Z=2 in the start point; Z=8 in the end point, since
DISCL=6
•
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.