Mitsubishi Electronics A172SH Sleep Apnea Machine User Manual


 
Positioning Control The World of Positioning Control 1
1-2
1.2 Diversified actuators
A power source which moves an element in a system is called actuator. A unit which detects
a position of a work piece or moving part is called sensor.
Diversified actuators and sensors, from simple ones to enhanced ones, are used in
positioning.
This paragraph describes representative types, their features and weak points.
Pneumatic
Air source and high grade piping are
required.
High torque is not available.
Multi-point positioning is complex and
very difficult to achieve.
Change in positioning is difficult.
Brake motor
Positioning mechanism is simple.
Repeatability is poor.
Change in positioning is difficult.
(When optical sensors or limit switches are
used for stop)
Clutch brake
Frequent positioning is available.
Life of friction plate is limited.
Change in positioning is difficult.
(When optical sensors or limit switches are
used for stop)