The Cam Analysis consists of 3 interchangeable cams and 2 different cam followers. The cams are rotated using a electronically controlled motor and pulley gear arrangement. A large inertia mass is connected between the motor and cam to ensure consistent running at various speeds. Bench top apparatus to demonstrate the dynamic investigation of cam mechanisms, as used in motors for actuation of the valves.
On top of the shaft can be attached a number of removable masses which allow the valve mass to be changed. The follower attaches to a vertically moving shaft which simulates the valve itself.
Experimental Capabilities:
Determination of the limiting speed and its comparison with the theoretical value
Comparison of the various cam designs
Elevation curve for a bouncing pick-up
Relationship between cam and spring force
Elevation curves supplied by unsuitable pick-ups.
The angular position of the cam is shown on a protractor and a pointer, this assembly allows the cams position through rotation to be recorded. A vertical pillar contains the main spindle for each Cam Analysis Apparatus to be rotated, whilst a dial gauge has its anvil resting on the top edge of the cam. The rise and fall displacement of the Cam Analysis Apparatus, as it rotates through 360°, is measured using a dial gauge. Cams and followers are easily changed and graphs for the variety of cams can be created to compare the linear change with the rise and fall of the follower. Each cam is mounted on a central shaft and is free to rotate about this shaft. The cams are rotated by hand.
Experimental Capabilities:
To derive the velocity and acceleration diagrams, and determine the maximum acceleration of the follower
To compare experimental and calculated results
To determine a graph of follower displacement against angular rotation of the cam
To assess the effect of different cams and followers.
Bench top unit.
Main metallic elements made of stainless steel.
Diagram in the panel with distribution of the elements similar to the real one.
Unit mounted on an anodized aluminum frame with painted steel panel.
Four interchangeable cams:
One concave cam.
One tangent cam.
Two circular cams with different radii of lateral curvature.
