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
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