An eccentric cam of eccentricity 35 mm drives a follower of mass 1.8 kg. The spring holding the follower against the cam has stiffness of 25 N/mm and has an initial compression of 35 mm. It is observed that jump occurs at rotation of cam of 110° from the lowest position of the cam. Find out the speed of the cam in rpm. Also find out maximum useable speed of cam without jump.

An eccentric cam of eccentricity 35 mm drives a follower of mass 1.8 kg. The spring holding the follower against the cam has stiffness of 25 N/mm and has an initial compression of 35 mm. It is observed that jump occurs at rotation of cam of 110° from the lowest position of the cam. Find out the speed of the cam in rpm. Also find out maximum useable speed of cam without jump.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

6.7 A plate cam with a reciprocating follower is to rotate clockwise at 400 rev/min. The follower is to dwell for 60° of cam rotation, after which it is to rise to a lift of 2.5". During 1" of the return motion, it must have constant velocity of -40 in/s. Recommend standard cam motion from Sec. 6.7 to be used for high-speed operation, and determine the corresponding lifts, and cam rotation angles for each segment of the cam.
A cam drives a flat reciprocating follower in the following manner. During the first 90° rotation of the cam, the follower moves outward through a distance of 30 mm with SHM. The follower dwells during next 90° cam rotation. During the next 90° cam rotation, the follower moves inward with SHM. The follower then dwells next 90° cam rotation. Draw the cam profile and calculate the maximum values of velocity and acceleration when cam rotates at 10 rad/s.
A cam is used to operate a platform that repeatedly lifts boxes for a height of 40 mm as shown. One cycle of the cam has the following motion requirements: Rise to 40 mm in 1.5 s, Dwell for 0.25 s, Fall for 20 mm in 1 s; Dwell for 0.25 s; Fall a further 20 mm in 1s and the cycle repeats after this. The required speed of cam is rpm and the angle turned by cam during the Rise motion is degrees. *Write your answer only as numbers, DO NOT add any text 40 mm
A cam have the following specifications: Follower to move outward through 5 cm during 90° of cam rotation, it dwells for the next 60°. The follower then return to its original position through an angle 0R and then dwell for the rest of the cam rotation of 110°. The displacement of the follower is to take place with constant speed motion during both the outward and return strokes. The least radius of the cam is 4 cm. If the cam rotates at 300 r.p.m., construct the displacement, velocity and acceleration diagrams. Also determine The displacement, velocity, acceleration and the pressure angle for the following angles (40°, 75°, 145°, 200°).
The following particulars relate to a symmetrical circular cam operating a flat-faced follower : Least radius = 25 mm ; nose radius = 8 mm, lift of the valve = 10 mm, angle of action of cam = 120°, cam shaft speed = 1000 r.p.m. Determine the flank radius and the maximum velocity, acceleration and retardation of the follower. If the mass of the follower and valve with which it is in contact is 4 kg, find the minimum force to be exerted by the spring to overcome inertia of the valve parts. [Ans. 88 mm ; 1.93 m/s, 690.6 m/s, 296 m/s ; 1184 N]
The following particulars relate to a symmetrical circular cam operating a flat-faced follower : Least radius = 25 mm ; nose radius 120°, cam shaft speed = 1000 r.p.m. = 8 mm, lift of the valve = 10 mm, angle of action of cam = %3D Determine the flank radius and the maximum velocity, acceleration and retardation of the follower. If the mass of the follower and valve with which it is in contact is 4 kg, find the minimum force to be exerted by the spring to overcome inertia of the valve parts. [Ans. 88 mm ; 1.93 m/s, 690.6 m/s², 296 m/s² ; 1184 N]
Explore the profile of a cylindrical cam to give uniform velocity during outstroke of 25 mm to its follower during the first half of the revolution. The return of the follower also takes place with uniform velocity during the remaining half of the revolution. The cylinder diameter is 25 mm. The cam is rotating with constant rpm.
An eccentric cam of eccentricity 3.75 cm drives a follower of mass 1.75 kg. The spring holding the follower against the cam has stiffness of 24 N/mm and has initial compression of 3.125 cm. It is observed that jump occurs at cam rotation 100° from the lowest position of the cam. Find out the speed of cam in rpm. Also find out maximum usable speed of cam without jump.
Please answer the question in 5mins I will rate your answer. Cam mechanisms are used in many machines. For example, cams open and close the valves in your car engine to admit gasoline vapor to each cylinder and to allow the escape of exhaust. The principle is illustrated in the figure below, showing a follower rod (also called a pushrod) of mass m resting on a wedge of mass M. The sliding wedge duplicates the function of a rotating eccentric disk on a camshaft in your car. Assume that there is no friction between the wedge and the base, between the pushrod and the wedge, or between the rod and the guide through which it slides. When the wedge is pushed to the left by the force F, the rod moves upward and does something such as opening a valve. By varying the shape of the wedge, the motion of the follower rod could be made quite complex, but assume that the wedge makes a constant angle of ? = 19.0°. Suppose you want the wedge and the rod to start from rest and move with constant…
Draw the profile of a cam operating a roller reciprocating follower and with the following data: Minimum radius of cam =25 mm; lift=30mm; Roller diameter= 15mm. The cam lifts the follower for 120° with SHM, followed by a dwell period of 30. Then the follower lowers down during 150° of cam rotation with uniform acceleration and retardation followed by a dwell period. If the cam rotates at a uniform speed of 150 RPM. Calculate the maximum velocity and acceleration of follower during the descent period
Consider a cam having a stroke of 20mm rotating at a speed of 120 rpm. Angle covered in outstroke/forward stroke is 100°. The maximum velocity (mm/s) and acceleration (mm/s) of follower during return stroke are
A disc cam is to give uniform motion to a knife edge follower during out stroke of 50 mm during the first half of the cam revolution. The follower again returns to it's original position with uniform motion during the next half of the revolution. The minimum radius of the cam is 50 mm and the diameter of the cam shaft is 35 mm. 1.Draw the fully defined displacement diagram of the follower. 2.Draw the profile of the cam when the axis of the follower passes through the axis of the cam shaft.