Siemens SINUMERIK 840Di sl - Page 305

6
01/2008 "Program" operating area
6.7 Free contour programming
6
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition 6-305
Pole change example
Pole:
X
Pole
= 0.0, Y
Pole
= 0.0 (Pole 0)
End point:
L1
abs
= 10.0
ϕ
abs
= 30.0°
Calculated Cart. Coordinates
X
abs
= 8,6603 Y
abs
= 5.0
New pole:
X
Pole1
= 5.0 Y
Pole1
= 5.0 (Pole 1)
Calculated polar coord.
Predecessor
L1
abs
= 3,6603
ϕ
abs
= 0.0°
Next point:
L1
inc
= -2.0
ϕ
inc
= 45.0°
Absolute polar coordinates for
current element
L1
abs
= 1.6603
ϕ
abs
= 45.0°
Calculate Cartesian coordinates
X
abs
= 1.1740 Y
abs
= 1.1740
5
5
10
Y
X
8.6603
10
Pole 0
Pole1
f
inc
45.0 °
f
i
nc
30.0 °
L1
inc
-2
Prev.
element
Polar coordinates for prev
element with ref to pole 1:
L1= 3.6603,
f
= 0
f
0 °
1.6603
Polar coordinates with
ref. to pole 0 (entry)