7 Wiring
7.1.4 SGLTW and SGLTM Linear Servomotor (T Type with Iron Core)
7-14
Make sure that hands or tools are not jammed or caught due to the attraction of the magnetic way when the coil assembly
approaches the end of the magnetic way. When the air gap between the coil assembly and the magnetic way is fixed, the
nonmagnetic sheet is not required. (Refer to the table of dimensions in step 1.)
3. Move the coil assembly back and forth several times over the magnetic way from end to end, making sure
that the coil assembly is not touching the magnetic way and that no foreign objects (such as magnetic par-
ticles) are present. Use a nonmagnetic (brass or stainless steel) gap gauge to check that the air gap
between the coil assembly and the magnetic way is even (estimated gap:
±
0.3 mm (0.012 in)).
(3) Magnetic Attraction
The linear servomotor is constructed of an opposing coil assembly and magnetic way. Therefore, magnetic attrac-
tion is offset when the air gap between the coil assembly and both magnetic ways is even.
However, achieving an even air gap is difficult due to the accuracy of the linear servomotor itself and the device,
and error in the assembly of the linear servomotor at installation. Consider the magnetic attraction values shown
in the following table when designing the device to account for the effect of magnetic attraction (calculated val-
ues).
* 1. Indicates an air gap value when one side is +0.3 mm (0.012 in) and the other side is
−
0.3 mm (
−
0.012
in) relative to the design values.
* 2. Indicates the magnetic attraction at maximum force.
INFO
Coil Assembly
Model
SGLTW-
Air gap
G1
∗
1
in mm
(in)
Air gap
G2
∗
1
in mm
(in)
Magnetic
attraction
F1
∗
2
(N)
Magnetic
attraction
F2
∗
2
(N)
Attraction
difference
∆
F
(N)
20A170A
1.3
(0.05)
0.7
(0.03)
760
1030
270
20A320A
1510
2040
530
20A460A
2260
3050
790
35A170A
1.3
(0.05)
0.7
(0.03)
1330
1800
470
35
170H
35A320A
2650
3570
920
35
320H
35
460A
4000
5400
1400
40
400B
1.7
(0.07)
1.1
(0.04)
4700
5900
1200
40
600B
7000
8700
1700
50
170H
1.3
(0.05)
0.7
(0.03)
1990
2600
700
50
320H
3750
5100
1350
80
400B
1.7
(0.07)
1.1
(0.04)
9200
11400
2200
80
600B
13600
16900
3300
Air gap
G1
Magnetic
attraction
F1
Coil assembly
Magnetic way
Magnetic way
Magnetic
attraction
F2
Air gap
G2
Содержание SGLFW
Страница 270: ...9 3 9...