PS600 Loading Bridge

Loading Bridge Mechanics,Motor, Sensors

By a three-phase synchronous drive, a toothed wheel and a toothed belt a cart is driven along a guiding bar. A gear motor with a rope winch is mounted on top of the cart. The sensors are three rotary incremental encoders for the position of the cart, the rope angle and the rope length. The system is built on aluminium profiles and covered with a plastic container outside of the range of the rope. The electrical signals are connected through multi-pin plugs.

Dimension Sizes and Weight of the System

• Length: 1880 mm
• Depth: 430 mm
  ( + 140 mm for the bridge mechanics)
• Height: 270 mm
• Weight: 40 kg

Inputs:

• motor nominal voltage for position control
  (+24 V, nom. 12,5 A, nominal torque 0,7 Nm)
• armature voltage for gear motor
  (-24 ... +24 V, nom. 2 A)
• + 15 V inductive proximity switch supply voltage
• +5 V incremental encoder supply voltage

Outputs:

• position (incremental encoder: 22,75 incr/mm, range: +⁄− 600mm)
• 2 limit switches (position left/right)
• rope length (incremental encoder:100 incr/cm, range: 500mm)
• 2 limit switches (rope top/bottom)
• rope angle (incremental encoder: 45,5 incr./°)
• 2 binary system identification signals

Actuator with power supplies and system control
Inside a 19"-case (length 470 mm x depth 370 mm x height 156 mm, weight 10 kg) there are a servo unit, a power supply and two system control units (System Status, User Control). The system status displays whether the plant is connected to actuator, the system is ready to operate, the plant type as well as manual/PC/ external controller. The user control contains two keys (start manual or external controller), one potentiometer (manual control signal), two measurement outputs (control signals for servo amplifiers) and two signal inputs (external control signals for servo amplifiers) as well as a key to stop any controller. The panel section ‘SERVO Bridge’ indicates the operation mode as well as the state of the limit switches. A potentiometer allows for adjusting manually the control signal for the servo amplifier of the rope winch motor which is active only during pressing an accompanying key.
Actuator mains supply (220 V, 50 Hz, 400 W, on request 110 V, 60 Hz)

Inputs ‘SERVO MOTOR’ (Position):

• 2 limit switches (left/right)
• control signal -10 ... +10 V
• servo enabled/disabled
  

Output ‘SERVO MOTOR’ (Position):

• control signal for the motor