Instruction manual

A - 9
Handling of Linear Servo Motor
1. Magnetic suction
The secondary side of the linear servo motor contains a strong permanent magnet, so a magnetic suction
power (power by which a magnet attracts magnetic bodies) is generated toward magnetic bodies such as iron.
This magnet suction is always acting whether the motor power is turned ON/OFF.
M
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Always acting whether
the power is ON/OFF
Magnet face side
Mount (yoke) face side
The magnetic fluxes generating from the permanent magnet disperse in the air from the magnet face side
(facing the primary side), and most of them do not leak to the mount (yoke) side for its structure.
Because of this, a magnetic suction power occurs on the magnet face side of the secondary side and does not
on the mount (yoke) face side.
Permanent
magnet
Magnetic suction occurs.
Magnet face side Magnetic fluxes disperse.
Magnetic
fluxes
NNS
Mount (yoke)
Mount face side Magnetic fluxes do not
disperse.
Magnetic suction does not occur.
The permanent magnet used for the linear servo motor is very strong.
When an A4-sized iron sheet is fully attracted, the magnetic suction power becomes as high as 2.5t. Use
abundance of caution with the handling.
When an A4-sized iron sheet is fully attracted
Magnetic suction 400[kPa]
A4
(21 29.7cm)
Approx. 2.5t
2. For the safety
The magnetic suction power is in inverse proportion to square of the distance to a magnetic body, so it
drastically increases when the distance becomes small.
When mounting the secondary side of the linear side motor, ensure the sufficient distance from the magnetic
bodies around it and securely fix those magnetic bodies.