Mitsubishi MELSEC-F, Training Manual

Page: 29 / 74

Positioning Control Components of Positioning Control and Their Roles 3
3-3
PLG
SM
Servo
motor
When
required
Electromag
netic brake
Cooling fan
In the case of large motor
Moving element
Ball screw
Auxiliary device such as chuck, drill and cylinder
Near point
dog switch Limit switch
(LS)
Limit switch
(LS)
Drive mechanism
When a moving element goes beyond a limit
switch (LS), the motor stops.
Servo motor
Encoder
(pulse
generator)
Servo motor
Speed
reducer
Setting / display unit
Sensor, actuator,
auxiliary device
• The actuator (moving part drive
mechanism) is equipped with
speed reducer, timing belt, ball
screw and limit switch.
• Diversified auxiliary devices are
also controlled in accordance with
positioning.
• The PLC or the positioning
controller also controls auxiliary
devices.
• The auxiliary device operation
completed signal is output to the
PLC or the position controller.
• 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.
• Dedicated to high speed response optimal to
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).
Hand held
Programmer
Personal
Computer
Graphic
Operator
Terminal