Mitsubishi MELSEC-F Training Manual page 29

Positioning Control
Servo motor
• Dedicated to high speed response optimal to
Servo motor
In the case of large motor
Cooling fan
SM
Encoder
PLG (pulse
generator)
When
Electromag
required
netic brake
Hand held
Programmer
Setting / display unit
• Used to write programs to the
p o s i t i o n c o n t r o l l e r, a l l o w s
setting and display of the data.
positioning control, has large start torque, large
maximum torque and wide variable speed range
1/1 or more (1/1,000 to 1/5,000).
Limit switch
(LS)
Servo
motor
Speed
reducer
Personal
Computer
Components of Positioning Control and Their Roles 3
When a moving element goes beyond a limit
switch (LS), the motor stops.
Drive mechanism
Near point
dog switch
Auxiliary device such as chuck, drill and cylinder
Sensor, actuator,
• The actuator (moving part drive
• Diversified auxiliary devices are
Graphic
Operator
Terminal
• The
• The auxiliary device operation
Moving element
Ball screw
auxiliary device
mechanism) is equipped with
speed reducer, timing belt, ball
screw and limit switch.
also controlled in accordance with
positioning.
PLC or the
controller also controls auxiliary
devices.
completed signal is output to the
PLC or the position controller.
Limit switch
(LS)
positioning
3-3