2. TYPES OF CAMS Eccentric cam: Here are the philosophers. What are the three types of CAM? Want to see the step-by-step answer? A cam is a mechanical member which impart desired motion to the follower by direct contact. 0-180°, follower moves 70 mm to the right with simple harmonic motion. d. All of the above. The difference between 1st, 2nd and 3rd class levers; You may also want to. Circular cams use an off-centre pivot to cause the follower to move up and down. It gives hosts of TV shows a new level of freedom as they can play and physically interact with graphics – move them around, throw them or whatever comes to their mind. Dependent. Cam mechanisms can realize any required output motion. Create various types of linkage mechanism in CAD and simulate for motion outputs and study the relevant effects. The follower is easy to make and doesn’t require a lot of precision. Further a rigid body like a cylinder can be added along with other shaped bodies inter connected with each other by joints, and each with its defined motion in particular direction. Cam is a rotating element Which provides an oscillation or reciprocatory motion to another part connected with the cam. This is the cam that rotates and the follower which is hinged here oscillates, so this is called curved-face. There is no stationary period. [Dec.2010] During the operation, the cam rotates at a uniform angular velocity and the follower may have one of the following motions: Uniform velocity motion (Uniform motion) Simple harmonic motion Uniform acceleration and retardation motion Cycloidal motion 16. Cam and Follower Mechanism is a widely used method of motion transformation. 1 Cam follower systems are designed to achieve a desired oscillatory motion. 2 Some of the standard follower motions are as follows: 3 They are, follower motion with, 4 (a) Uniform velocity. 5 (b) Modified uniform velocity. 6 (c) Uniform acceleration and deceleration. 7 (d) Simple harmonic motion. 8 (e) Cycloidal motion. 1) Translatory motion type follower In this type of follower, follower have translatory motion means cam is rotating and follower reciprocating between guide way. Q. Shah Type of motion constraints Critical Extreme Position (CEP) Critical Path Motion (CPM) 8. 3. Explanation: When the motion of the follower is along an axis away from the axis of the cam centre, it is called off-set follower. Side-to-side. Previous question Next question. (2) Oscillating follower In this type of followers they may have an oscillatory motion. 3. If a cam moves in reciprocating motion the follower moves in vertically respect to the axis of the cam. MECHANICAL ENGINEERING. There are many follower motions that can be used for the rises and the returns. According to the Surface Contact: 1. When the follower The acceleration is finite at all times, the starting and ending acceleration is zero. During the process of designing Cam-follower mechanisms, the designers must select or synthesize the motion curve for the desired output positions of the follower and the dynamic responses of the system, and then design the Cam Various types are shown below. Pg3. Cams that impart motion to the follower in a plane in line with the axis of rotation of the cam (as does a cylindrical cam). The task for a cam and follower mechanism is provided by a displacement diagram, which defines the rotation angle or sliding distance of the follower as a function of the rotation of the cam. 2. A rectangular sheet of hard plastic can be used as the base. The size of the follower can also increase the time that the cam is in contact with the follower. The contacting end of the follower with the cam has a sharp knife edged hence it is called so. The follower surface, instead of flat, can be also a curved surface. 1.Disk or Plate Cam's :-. Includes 1 static object that is a background, piece of scenery, or other objects. Cam and follower mechanism types and functions. The follower moves in a plane perpendicular to the axis of rotation of the camshaft and is held in contact with the cam by springs or gravity. Translational motion can be of two types, rectilinear and curvilinear. Snail or drop. They also include complementary needle rollers. Followers are classified based on their motion, position and shape. (You may find springs used in a cam mechanism to keep the follower and the cam in contact, but it is not part of the cam mechanism.) An interior follower zone is a system zone that has a Response Type of interior follower. Realists. Knife edged. At least Ten experiments are to be performed in the Semester. Cams are mechanical devices used to convert the rotation of a shaft into simple or complex reciprocating linear motion. Uniform acceleration and retardation It is not used in practice because small area of contact surface results in high rate of wear at the edges due to which the transmission of motion may not be accurate as desired. Heart-shaped or constant velocity cams have a shape similar to a heart. Types of follower motion - Uniform velocity – Simple harmonic motion and uniform acceleration. Possible motion types are: Up-down. Th e motion properties depend on the follower motion type that is selected from a list of co mmon motions including dwell, constant velocity, constant acceleration, simple harmonic, cycloi dal and modified trapezoidal, and modified parabolic. The above-mentioned Knife edge follower, roller Follower and flat-faced followers are the radial follower. Types of follower motion Cam follower systems are designed to achieve a desired oscillatory motion. Types of follower motion: Cam follower systems are designed to achieve a desired oscillatory motion. 15 To generate spur gear involute tooth profile using simulated gear shaping process. Follower is an object & people tracking system that makes physical interaction with graphics possible, essential making Virtual objects behave as if they were real. Uniform acceleration and retardation of follower motion. Know without westing time let's begin to start cam and follower mcqs ( objectives) questions with answers. normal force. follower and study the degree of freedom and motion patterns available. ... Yoke-type cam follower … 2.1 Rotating cam/Translating follower. The follower rises and falls steadily with uniform velocity. Of the six follower motion types presented in Design and Kinematic Analysis of Disk Cams, which type produces the smallest acceleration? Some Cams and follower 7 SurilV. For low and moderate speed engines, the cam follower should move with a) uniform velocity b) simple harmonic motion c) uniform acceleration and retardation d) cycloidal motion Answer: b Explanation: None. A basic Line follower robot can consist of a base at the two ends of which the wheels are mounted. ... Energy Follower looks to cover all aspects of Energy: Wind, Biomass, Geothermal, Solar, Hydropower, Nuclear, Fossil Fuels, and more. at-face follower motion is a rise of 2 in with SHM in 180 of cam rotation, followed by a return with SHM in the remaining 180 . Types Of Cam And Followers. (ii). The motion between the cam and follower is sliding. Reciprocating follower; In this type, as the cam rotates, the follower reciprocates or translates in the guides. Interior follower is often used with indoor motion sensors.. Basic shapes; Types of follower movement; Manner of constraints of the follower . The details of followers classifications are shown in the figure 4 and discussed below 1. The details of followers classifications are shown in the figure 4 and discussed below: 1. Oscillating follower; The follower is pivoted at a suitable point on the frame and oscillates as the cam makes rotary motion. Assuming constant angular velocity for the input cam ( w ), since t = q/w : s= a 1 q/w +a 0. The follower, during its travel, may have one of the following motions. Group b: Cams that impart motion to the follower in a plane at 90 degrees to the axis of rotation, as with face or edge cams.Most cams fall into this category. Trace point: Trace point is a point on the follower, Radial follower Stiffness of the spring is 30 N/mm2. 3. According to the path of motion of the follower. Classification according to basic shapes of the cams: Wedge cam: A wedge cam has a wedge of specified contour. The oscillating follower is one of the important parts in the cutting system, and its structure affects the work performance significantly. Circular. Make a Mechanism that uses a Cam to convert one type of motion into another type of motion. The two types of friction are static friction and _ and friction. b. Another part associated with the cam is called 'follower'. ... connecting rod, and a follower? Let H= Total follower rise (Stroke) b = angular rotation of the cam corresponding to the total rise of the follower. You can see an application of the cam follower in another article here about the internal combustion engine.The basic purpose of using the cam follower is converting the rotary motion of the cam to the translating or oscillatory motion of the follower. Translating followersare constrained to motion in a straight line and are shown in figure 4 (a) and 4 (c). An interior follower zone is a system zone that has a Response Type of interior follower. Types of Motion When two curved members like say a gear teeth or cam and follower transmit motion, with direct contact, it could be any of the following. The follower prevents the push and pulls of the cam. Needle Roller . View Answer. Which motion of follower is best for high speed cams? A) Pure rolling B) Pure sliding C) Combined rolling and sliding In the case of pure rolling no single point on one of the members makes contact with two successive points on the second member. Because of its simplicity the Disk or Plate type cams are most commonly used Cam's. This design … The single and multiple head cams are the two types of head cam. They can be sliding or rotational pieces in a mechanical linkage Application – Cam follower bearings are used mainly in three types of applications: following the surface of a cam, supporting linear motion components, or laterally locating components during linear movement. Each type is not exclusive, for instance, an illuminated bulb uses electrical energy to produce radiant and heat (thermal) energy, as does a toaster. A type of motion in which all parts of an object move the same distance in a given time is called translational motion. A CAM changes the input motion, which is usually rotary motion (a rotating motion), to a reciprocating motion of the follower. TYPES OF CAMS Eccentric cam: 1).What type of motion will produce linear follower displacement? According to the type of Mechanical constraint / Types of closure: Types of Mechanical Constraint classified into two types, Self closed pair and; ... whenever two elements of pair are held together mechanically in such a way that only required the type of relative motion occurs called Self closed pair or closed pair. 1. Radial follower In the disc CAM, the working surface of the cam is designed such that follower moves in a plane perpendicular to the axis of the cam performing a reciprocating or oscillating motion. According to the motion of the follower:-The followers, according to its motion, are of the following two types: (a) Reciprocating or translating follower. Types of Followers 1. (a) Radial follower. The upward movement of follower is called rise and the downward movement is called fall. The composition of a cam mechanisms is simple: a cam, a follower and a frame. Reciprocating follower; In this type, as the cam rotates, the follower reciprocates or translates in the guides. Motion curves are used to specify the input-output motion relation for the Cam design (Jenson, 1987). Types of followers: (i) Based on surface in contact. Based on Follower Motion Based on the follower motion, followers … When the motion of the follower is along an axis passing through the center of the cam, it is known as radial follower. Creation of various joints like revolute, planes, spherical, cam follower and study the degree of freedom and motion patterns available. (d) Spherical faced follower. Roller follower (b) – The roller follower has the advantage that the sliding motion between cam and follower is largely replaced by a rolling motion. Fig. Displacement Diagram of Uniform Velocity: There are different types of follower but they all slide or roll on the edge of the cam. 14 Create various types of linkage mechanism in CAD and simulate for motion outputs and study the relevant effects. Just as there are different types of leaders, there are also different types of followers. Make the Cam Toy base. Appropriate displacement patterns are to be selected for this purpose, before designing the cam surface. Sycophants. Examples are vehicles moving on a road, a child going down a bird flying in the sky. Once the contact shape of follower and its motion are defined, the cam can be constructed using graphical or numerical techniques. In this chapter, we describe a number of basic curves. The contour or the shape of the groove is determined by the specified motion of the follower. Though the follower can be made to have any type of desired motion, knowledge of the existing motion saves time and labour while designing the cams. With this Response Type, the security system will trigger an immediate alarm if the sensor is activated while the system is set to arm away. An offset type of follower in which the motion Follower is along an axis from the axis of the cam center. Cams and Followers - Mechanical Engineering (MCQ) questions and answers. Interior follower is often used with indoor motion sensors.. Uniform velocity. Knife edged followers: These are simple in construction. If you turn the cam, the follower will move. A follower is a rotating or an oscillating element of a machine that follows the motion of cam by direct contact. a. SHM follower motion. The follower is pivoted at a fix position where oscillating or rotating motion in … Note: 1. Also known as a toady, a sycophant follower knows nothing but an advantage. The followers are used to transfer the movement to the required machine part. How Engineers make use of cams and different types of mechanical movement in machines. Large flat cam followers can be used to create a rotary motion. The trick is to offset the cam follower shaft so that the cam makes contact with one side of the cam follower. If you use one cam in this way, it will rotate the cam in one direction. It will yield a cam mechanism with the lowest vibration, stress, noise and shock characteristics. The cam converts rotary motion of one element into reciprocating (linear) motion or into oscillatory motion. Simple harmonic motion. Shah Follower function CAM … Cam and follower. In the disc CAM, the working surface of the cam is designed such that follower moves in a plane perpendicular to the axis of the cam performing a reciprocating or oscillating motion. Classifications of followers according to line of movement. SOLUTION. Heart-shaped or constant velocity. (b) Modified uniform velocity. Figure 6-11 Motion events What are the different types of motion with which a follower can move? check_circle Expert Answer. (Fig. Cam profile: Cam profile is outer surface of the disc cam. A comparative study of these event and cam profile types reveals some very interesting and hitherto unknown results. Radial Follower and the Offset Follower. See Answer. The coefficient of friction is the ratio of the force of friction divided by the. 4/19/19 5 SurilV. 15.What are the different types of follower motion used in cam-follower mechanism? Pear cams are called this as they have the shape of a pear. Table shows the differences between rectilinear and curvilinear motions. Rise is the motion of the follower away from the cam center, dwell is the motion during which the follower is at rest; and return is the motion of the follower toward the cam center. (e) is an oscillating or rotating follower. Base circle: Base circle is the smallest circle, drawn tangential to the cam profile. Shah Type of Motion Program Rise-Fall Rise-Fall-Dwell Rise-Dwell-Fall-Dwell 9 SurilV. (1) Radial follower When the motion of the follower is along an axis passing through the centre of the cam, it is known as radial followers. Based on Follower Motion Based on the follower motion, followers can be classified into the following two categories: (i). Working of Follower. These cam followers are equipped with the necessary heavy-duty, outer ring cross-section. Classifications of followers according to line of movement. Depth of groove, 7 mm. Cam And Follower: Source. Analysis of motion of followers : Roller follower – circular cam with straight, concave and convex Appropriate displacement patterns are to be selected for this purpose, before designing the cam surface. The realist followers are so aware of reality and they have to let … Cam follower is also known as 'Track Follower'. The prime (base) circle radius R o = 2 in, and there is NO OFFSET. A camshaft lobe converts the rotary motion of the camshaft into reciprocating motion of the cam follower. 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. Cams that Create Rotary Motion. the follower is a perfectly flat face, it is called a flat-faced follower, as shown in Fig. Roller follower (b) – The roller follower has the advantage that the sliding motion between cam and follower is largely replaced by a rolling motion. Types . The translation motion of the wedge is imparted to the follower which either reciprocates or oscillates.Generally, a spring is used to maintain contact between the follower and the … Pear. All types of kinetic energy involve movement and motion. Use units of DEG for the plot. This part of the machine is mainly following the cam which can be … R. E. Kelley in his work “ In Praise of Followers” describes how they are measured along two dimensions: 1) Active vs. In a valid follower motion, the velocity and acceleration will remain continuous throughout the cycle — otherwise the device produces an impossible, infinite amount of jerk. 4) (a) Knife edge follower (b) Roller follower (c) Flat faced follower (d) Spherical follower . Hence for the high-speed engine, the cam follower should move with Cycloidal motion. Types of Followers Followers are classified based on their motion, position and shape. Group b: Cams that impart motion to the follower in a plane at 90 degrees to the axis of rotation, as with face or edge cams.Most cams fall into this category. Oscillating or rotating followers: In this case the follower oscillates when the cam rotates. 6.3a) or reciprocate (Fig. The follower surface which is in contact with the cam is in the form of a flat surface is called flat face follower. According to the motion of the follower. Example of this type follower is knife edge follower, roller follower, flat follower and … Heart-shaped or constant velocity. Cam follower systems are designed to achieve a desired oscillatory motion. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. Various types of cam follower are used for different types of applications. All that is in his mind is nothing but a strategic plan to keep on holding on or following till he gets what he really wants or keep on maintaining the advantage he wants. Pg14. Cams that impart motion to the follower in a plane in line with the axis of rotation of the cam (as does a cylindrical cam). A follower is a mechanical element with respect to which the cam rotates in an oscillating or circular motion. 13. Maximum velocity and maximum acceleration during outward and return strokes in the above 3 cases. TYPES OF CAMS Eccentric cam: 180-360°, follower moves 70 mm to the left with simple harmonic motion. Answer: ω < √ ( P + 2 ke) / (me) 10 Calculate the limiting speed to avoid cam jump, if an eccentric plate circular cam has eccentricity of 30 mm and provides motion to the follower of 4 kg mass. Stiffness of the spring is 30 N/mm2. Cam followers convert rotary to linear motion and range from simple two-dimensional cams to complex three-dimensional indexing cams with several followers. Cam and Follower Mechanism is a widely used method of motion transformation. 6.3b). The follower, as shown in fig. 9. According to the surface in contact. In this mechanical engineering lecture today we learned about machine design subjects mcq on cam and follower. Guys this cam and follower mcq is important for mechanical engineering student for all competitive exam. Of the six follower motion types presented in this chapter, which types fully satisfy the fundamental law of cam design? Want to see this answer and more? follower motion properties in each interval. (b) Roller follower. In this type the motion of the follower is reciprocating or translating in the guides where as cam rotates uniformly. Using Altair Hyper works, a type of cam known as the disc cam can be simulated. Stability of the system is investigated for three types of follower motion events and four different cam profiles. The followers, according to its path of motion, are of the following two types. fullscreen. Expert Answer. ... A mushroom type follower has a greater surface area in contact with the cam lobe than a strait body lifter and will withstand higher contact pressure. 25. Some of the standard follower motions are as follows: They are, follower motion with, (a) Uniform velocity. (a) Knife edge follower. Using Altair Hyper works, a type of cam known as the disc cam can be simulated. Cam is a rotating element Which provides an oscillation or reciprocatory motion to another part connected with the cam. Fig. ... Use ¼” wood dowels for the drive shaft and the cam followers. The cam is assumed to rotate at a constant speed and the follower raises, dwells, returns to its original 1985). This type of follower works best with simple, oval shaped cams. Creating Rotary Motion in One Direction See video and/or the dimensioned drawing for a starter design. Appropriate displacement patterns are to be selected for this purpose, before designing the cam surface. The cam is the driver member and the follower is the driven member. The cam and follower mechanism is widely used for operating the inlet and exhaust valves of internal combustion engines. Group b: Cams that impart motion to the follower in a plane at 90 degrees to the axis of rotation, as with face or edge cams.Most cams fall into this category. When the follower is not moving upward and downward even when the cam rotates, it is called dwell. 2. (c) Flat faced or mushroom follower. A cam-follower forms higher pair as they have point contact at the junction. give an oscillatory motion to the follower for a continuous rotation of the crank. 3 Translating cam. (c). These are not often used due to the rapid rate of wear of the knife edge. 2. Cylindrical cam, rotating anticlockwise, operating a roller follower 14 mm diameter. The disk (or plate) cam has an irregular contour to impart a specific motion to the follower. The different types of cam-follower mechanisms are described below. c) constant velocity It can be observed from diplacement diagram as well as equation of motion for constant velocity view the full answer. Cam-follower mechanisms are categorized based on the input and output motion of their configurations. Cam may be rotating or reciprocating while a follower may be rotating, reciprocating and oscillating. The follower may oscillate (Fig. The type of follower used with this CAM is the roller-follower. 1) Calculate the limiting speed to avoid cam jump, if an eccentric plate circular cam has eccentricity of 30 mm and provides motion to the follower of 4 kg mass. 2. Linear motion : Equation describing a linear motion with respect to time is: s= a 1 t +a 0. The effect of damping on parametric instability is also studied. 10. Check out a sample Q&A here. According to Kelley, the five (5) are: One end of the oscillating follower is designed with a cutter, and the cutting of the PC steel bars is realized through an up-and-down swinging motion. Spin. When the motion of the follower is along an axis which is passing through the centre of the Cam, then these types of followers comes under the Radial Followers. Cam and Follower | Definition , types , Nomenclature Of Cam. DEFINITION. Cam is a mechanical element which is used to deliver the reciprocating or oscillating motion to another machine element known as follower. Cam and follower is a type of assembly, both works together in any machine element. The following Response Types are available for the SiXPIR with the Device Type of Motion Sensor: Interior Follower: An immediate alarm triggers if the zone is faulted while the system is Armed Away, unless an Entry/Exit Zone is faulted first. 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It will yield a cam moves in vertically respect to the follower surface which types of follower motion.