What is knife edge follower?

[′nīf ‚ej ′kam ‚fäl·ə·wər] (design engineering) A cam follower having a sharp narrow edge or point like that of a knife; useful in developing cam profile relationships.

Where would you use a knife edge follower?

The Knife Edge Follower: This is the simplest type, is not often used due to the rapid rate of wear. When it is adopted, it is usually for reciprocating motion, running in slides and there is considerable side thrust, this being a component of the thrust from the cam.

What is follower in cam profile?

A cam is a mechanical device used to transmitmotion to a follower by direct contact. The driveris called the cam and the driven member is called the follower.In a cam follower pair,the cam normally rotates while the follower may translate or oscillate.

What are the different types of cam followers?

There were various types of follower which are bellowed:

• Knife edge follower.
• Roller follower.
• Flat-faced follower.
• Spherical follower.
• Radial follower.
• Offset Follower.

What is an example of a cam and follower?

A common example is the traditional sash window lock, where the cam is mounted to the top of the lower sash, and the follower is the hook on the upper sash.

Which type of follower is the most accurate but most prone to wear?

Point or knife followers have a narrow point that sits on the cam. These are very accurate and low friction but are quick to wear away the pointed edge.

What is the minimum radius of cam?

The minimum radius of the cam is 25 mm. Draw the profile of the cam. 62. A cam drives a flat reciprocating follower in the following manner : During first 120° rotation of the cam, follower moves outwards through a distance of 20 mm with uniform acceleration and retardation.

What are the 3 types of cam?

There are various types of cams available, that are listed below:

• Disk or Plate cam.
• Cylindrical cam.
• Translating cam.
• Wedge cam.
• Spiral cam.
• Heart-shaped cam.

Can a knife edge follower be used with a cam?

Followers of type (c) will be taken up now. Knife-edge followers are generally, not used because of the obvious high rate of wear at the knife edge. However, cam of any shape can be worked with it. During working, considerable side thrust exists between the follower and the guide.

Those of followers falling under classification (a) and (b) have already been dealt with as indicated above. Followers of type (c) will be taken up now. Knife-edge followers are generally, not used because of the obvious high rate of wear at the knife edge. However, cam of any shape can be worked with it.

How to create a cam profile for a follower?

1 Draw the 100 mm diameter base circle. 2 Now draw the outermost of the concentric circle. 3 Since, there is no offset of the follower; hence the cam will be aligned with AB. 4 Now divide the base circle and the outermost circle by 300 sectors.

What does it mean when a follower has an offset?

If it has a little offset, that means the axis of the translation of the follower does not pass through the cam centre, then we call it as an offset translating follower. The cam rotates as before but this is the follower due to the shape of the cam, the follower undergoes an oscillatory motion and the follower is hinged at this point.