FOR BOTH THE BASIC AND TWO METER AIR TRACK
TEL 234 Precision Sine Drive
PRECISION SINE DRIVE
GLIDERS AND SPRINGS ON AIR TRACK FOR STUDY OF RESONANCE
The stepping motor is driven by an adjustable, stable oscillator with a power amplifier providing the pulse-forming phase-shifting network needed for the motor.
AMPLITUDE & FREQUENCY FOR TWO GLIDER STRING
Drive Motor — A 48 pole stepping motor directly driving a cam motor maintains exact phase-lock with the driving oscillator.
Sinusoidal — Motion produced by a circular cam mounted eccentrically. Stroke can be adjusted from 0-2cm.
Oscillator-Driver — An adjustable, stable oscillator with the four phase output needed for the stepping motor.
Frequency Range — .2-2 Hz. This range covers all resonances up to 10 coupled 150g gliders.
Interconnection — Motor connects to the rear panel by a 0.5 m long cable and a 6 pin plug.
Controls — Coarse and fine frequency knobs on the front panel and an on/off switch.
Dimensions — Oscillator; 9.5h x 17w x 14d cm
Weight — Both units 2 kg net.
COUPLED HARMONIC OSCILLATORS
A set of five 150 gm gliders, six stainless steel springs, and five ceramic magnets which, when set up in an air track provide a comprehensive course in vibration theory. From the basic configuration of a single glider and 2 springs to 5 gliders and 6 springs the student can set up and find as many resonances as there are gliders. The effect of damping on the sharpness of the resonance curve and the system Q can be determined by using the ceramic magnets. The motion of the magnets produces eddy currents in the metal of the air track causing a damping force proportional tothe velocity and number of magnets on the glider. This corresponds quite nicely to the damping term usually found in theoretical derivations of damped oscillatory motion.