SINO SDS2MS, Руководство по эксплуатации

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B. Smooth R
15
2) Let us recognize the plane coordinate and the start and end angles of a
circular arc.
In Plane XY
、
XZ or YZ, the coordinate of a point is its position with respect
to the zero point on the plane.
The coordinate of zero point O:(0,0)
The coordinate of Point A:(20,20)
The coordinate of Point B:(30,10)
The coordinate of Point C:(-20,20)
The coordinate of Point D:(-30,10)
The coordinate of Point E:(-30,-10)
The coordinate of Point F:(-20,-20)
The coordinate of Point G:(30,-10)
The coordinate of Point H:(20,-20)
In Plane XY
、
XZ or YZ, the start and end angle of a circular arc is counted in
anti clockwise.
As shown in Fig. 3:
From A to B 0
°
90
°
Arc AB
Form B to A 90
°
0
°
From B to C 90
°
180
°
Arc BC
From C to B 180
°
90
°
From C to D 180
°
270
°
Arc CD
From D to C 270
°
180
°
From A to D 360
°
270
°
Arc DA
From D to A 270
°
360
°
From E to B 45
°
90
°
Arc BE
From B to E 90
°
45
°
X
45°
Fig. 3
C
D 270°
360°
180°
B
E
90°
0°
A
Y
20
2
0
10
30
20
(0,0)
F
E
C
D
O
H
G
Fig. 2
X
A
B
Y
20
30
10