Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT v4.0 Programming Manual page 21

The direction of imaginary tool nose is determined by the tool direction during cutting.
Figure 1.23 and Figure 1.24 show the relation between the tool and the imaginary tool tip.
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● Imaginary tool nose
+ + + + Tool nose radius center
Figure 1.23 The direction of imaginary tool nose (1)
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● Imaginary tool nose
+ + + + Tool nose radius center
Figure 1.24 The direction of imaginary tool nose (2)
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1. General