HUST CNC H6D-T Manual
3 - 60
(2) The fine cut times m,chamfering settings r,tool-tip angle a, minimum cutting
amount Q ( d min) and reserved thread depth R(d) are modal codes. They remain
valid until another value is defined.
(3) The feed-rate between C and D is defined by F and fast feeding is applied to other
paths. The (+)(-) values of the increments in Fig. 3-39 are as follows:
U, W : Negative (determined by the directions of AC and CD).
R : Negative (determined by the directions of AC).
Fig. 3-45 Cutting Description
(4) The thread height K is acquired from the thread pitch and the tool nose angle. The
formula is:
Thread height k= (pitch/2) / Tan (angle/2)
Tan (angle/2),acquired from the trigonometric table.
Ex: If tool nose angle a=60°, Thread pitch F(l)=2 mm.
Fig. 3-46
Thread height k = (2/2) / Tan(60/2)
= (1) / Tan 30 = (1)/0.5774 = 1.732
Thread depth, k
Thread pitch (1)
30 30
TOOL
d
d n
k
d
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