Laboratory Experiments > Tandem Pendulum > Technical Data

PC60 Tandem Pendulum

Tandem pendulum, Motor,Sensors

By a three-phase synchronous drive, a toothed wheel and a toothed belt a cart is driven along a guiding bar. Two revolving pendulums are mounted on top of the cart. The sensors are three rotary incremental encoders for the position of the cart and the two pendulum angles. The system is built on aluminium profiles and covered with a plastic container outside of the range of the pendulum. The electrical signals are connected through multi-pin plugs.

Dimension Sizes and Weight of the System
  • Length: 1880 mm
  • Depth: 430 mm ( + 80 mm for the pendulum axis)
  • Height: 270 mm
  • Weight: 40 kg
  • motor nominal voltage (+24 V, nom. 12,5 A, nominal torque 0,7 Nm)
  • + 15 V inductive proximity switch supply voltage
  • +5 V incremental encoder supply voltag
  • 2 limit switches (left/right)
  • position (incremental encoder: 0.044 mm/incr, range: +⁄− 600mm)
  • 2 angles (incremental encoder: 0.022°/incr)
  • 2 binary system identification signals

Actuator with power supply 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 servo amplifier for the system Loading Bridge is already included in the standard version. Actuator mains supply (230 V, 50 Hz, 400 W, on request 110 V, 60 Hz)

Inputs servo unit:
  • 2 limit switches (left/right)
  • control signal -10 ... +10 V
  • servo enabled/disabled
Output servo unit:
  • control signal for the motor

PC adapter card
(Option 60-03)
Adapter card for a PC with three incremental encoder input channels and two analog output channels.

Extension kit tandem pendulum (Option 60-40)
Premounted plate with bearings, two rotary encoders, electrical connections and two pendulums (length 50 cm, weight 235 g and length 10 cm, weight 320 g).

Digital controller
(Option 60-42)
Executable Windows controller program (WINDOWS 7-10) for a PC with PCIe slot, documentation.

  • 3 incremental sensor signals (position, two pendulum angles)
  • control signal for the servo unit 10 ... +10 V
  • enable/disable servo

C++ source of digital controller (Opt. 60-45)
C++ source files of the PC controller program including library functions for graphic output, controlling the sampling period as well as controlling the PC adapter card (requires Opt. 60-42, Embarcadero C++ Builder V10).

Technical data are subject to change (Date 4-December-2017)