Lifter Moving-Up/Down; Cart Travel Control - Mitsubishi Electric Melsec FX Series Beginners Manual

Positioning by AC Servo System
2.2.5

Lifter moving-up/down

Description
As negative load is applied on the servo motor in positioning of the lifter in the vertical direction, a
regenerative option is also used.
In order to hold the lifter stationary and prevent drop of the lifter by power interruption, a servo motor
with an electromagnetic brake is used.
Lifter
2.2.6

Cart travel control

Description
A servo motor is mounted in the travel cart as the drive source.
A mechanism such as rack and pinion is adopted to prevent slippage between the wheels and rails.
Drive wheel
(on each of left
and right sides)
2 - 4
Servo
amplifier
Regenerative
option
Servo
motor
Cart
Examples of AC servo systems
Fig. 2-6:
Schematic drawing
Lifter moving-up/down
Fig. 2-7:
Schematic drawing
Cart travel control
MITSUBISHI ELECTRIC
200050da.eps
200060da.eps