Page 3 - Shimadzu Microservo MMT Series

Features

Compact and lightweight body An electrical power source is the only utility
required
required
Installation is easy due to lightweight and small body
Other utilities such as water and air are unnecessary
Quiet operation allows installation at any place Easy operation
Operation noise has been reduced compared to hydraulic systems

Working Principle (Control of Micro Loads)

The load generator is comprised of a permanent magnet and a force F
coil as shown in the diagram on the right. The permanent magnet is
fixed and the coil moves up and down.
When a current is passed through the coil, an electromagnetic force F
proportional to this coil current is generated according to the
following equation:
N S N
F = 2πrnBI
r : coil radius
n : turns of coil
B
I : coil current
The micro load is controlled with great precision by generating the
electromagnetic force through the control of the coil current using the
closed loop system.

Amplitude Characteristics

0.01 G 0.1 G 1 G 10 G 100 G
100

• This graph shows the relationship between the amplitude and
the frequency under sine wave generation (with no load).

Amplitude (mm) 10 • The characteristics of the frame and load cell are not

considered. Compensate for the influence of these factors
to obtain the actual amplitude characteristics.
100
cm/sec
1
• These characteristics have been estimated based on the
typical characteristics of the ACT used; there will be a
variation of about 10% on the frequency axis.

10
cm/sec
0.1
0.01 cm/sec 0.1 cm/sec 1 cm/sec
0.1 1 10 100
Frequency (Hz)