Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

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W1: Tool offset
18.5 Tool radius compensation 2D (TRC)
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1477
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