YASKAWA SIGMA-7 Series, Product Manual, Page: 142 / 187

6.1 Influence of Magnetic Attraction
6.1.2 SGLT Servomotors
6
E
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uipment De
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ign Pr
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6-3
6.1.2 SGLT Servomotors
The Magnetic Way tracks are located on both sides of the Moving Coil. If the gaps on both
sides of the Moving Coil are the same, the magnetic attraction is canceled. However, it is diffi-
cult to obtain the same gaps due to Servomotor precision, the precision of the user’s equip-
ment, error when assembling the Servomotor, and other factors. Consider the following
magnetic attractions when you design the equipment.
*1.
Gap values are given for the design value plus 0.3 mm on one side and minus 0.3 mm on the other side.
*2.
The maximum force is given for the magnetic attraction.
*3.
Dimensions in parentheses are for when the magnet cover is attached.
Moving Coil
Model
SGLTW-
Magnetic Gap,
G1
*1
(mm)
Magnetic Gap,
G2
*1
(mm)
Magnetic
Attraction, F1
*2
(N)
Magnetic
Attraction, F2
*2
(N)
Difference in
Magnetic
Attraction,
Δ
F
(N)
20A170
1.3
(1.1)
*3
0.7
(0.5)
*3
760 1030 270
20A320 1510 2040 530
20A460 2260 3050 790
35A170
1.3
(1.1)
*3
0.7
(0.5)
*3
1330 1800 470
35A320 2650 3570 920
35A460 4000 5400 1400
40A400
1.7 (1.5)
*3
1.1 (0.9)
*3
4700 5900 1200
40A600
1.7 (1.5)
*3
1.1 (0.9)
*3
7000 8700 1700
50A170
1.3
(1.1)
*3
0.7
(0.5)
*3
1900 2600 700
50A320 3750 5100 1350
80A400
1.7
(1.5)
*3
1.1
(0.9)
*3
9200 11400 2200
80A600 13600 16900 3300
Gap,
G1
Magnetic
attraction,
F1
Moving Coil
Magnetic W
ay track
Magnetic
attraction,
F2
Gap,
G2
Magnetic W
ay track