Elliptical trammel :
Law of Gearing :
What are the different types of follower motion ? Also draw displacement diagram for uniform velocity.
Different types of follower motions –
The follower during its travel may have one of the following motions:-
Uniform velocity, Simple harmonic motion, Uniform acceleration and retardation, Cycloidal motion.
Displacement Diagram of Uniform Velocity:
Write the procedure of balancing single rotating mass when it balance mass is rotating in the same plane as that of disturbing mass.
(1) Pitch circle- Circle drawn from centre of cam through pitch points.
(2) Pressure angle- Angle between direction of follower motion and normal to pitch curve.
(3) Stroke- Maximum travel of follower from its lowest position to top most position.
(4) Module –(Gears) – Ratio of pitch circle diameter in mm to No. of teeth on gear.
Explain the process of balancing of single rotating mass by a single mass rotating in the same plane.
m = Mass attached to shafts,
r = Distance of CG from axis of rotation.
Consider mass ‘m’ is attached to rotating shaft at a radius are then the centrifugal force exerted by mass ‘M’ on the shaft is
Fc = Mw2R Where,
W = Angular velocity of shaft
R = Distance of CG from axis of rotation
M = Mass attached to shaft.