What is displacement diagram in cam profile?

A Displacement Diagram is essentially a graph which plots the movement of a cam follower against time. Since the cam’s movement is usually constant then equal time intervals can be represented by equal distances along the horizontal axis and the resulting follower movement (or ‘displacement’) along the vertical axis.

What is meant by cycloidal motion?

(c)Cycloidal motion: Cycloid is the path generated by a point on the circumference of a circle, as the circle rolls without slipping, on a straight/flat surface. The motion executed by the follower here, is similar to that of the projection of a point moving along a cyloidal curve on a vertical lineas shown in figure.

How do you avoid jerk in a cam and follower motion?

The way to avoid jerk is to reduce the rate of acceleration or deceleration. In motion control systems, this is done by using an S-curve motion profile, instead of the “jerky” trapezoidal profile. In a trapezoidal move profile, acceleration occurs instantly (at least in theory) and jerk is infinite.

How are the displacement and acceleration of a CAM related?

The curve is the projection of a circle about the cam rotation axis as shown in the figure. The equations relating the follower displacement velocity and acceleration to the cam rotation angle are: In figure below the displacement, velocity and acceleration curves are shown. The maximum velocity and acceleration values given by equations:

Why is cycloidal motion used in a cam?

Cycloidal (extended sinusoidal) This motion has excellent acceleration characteristics. It is used often for high-speed cams because it results in low levels of noise, vibration, and wear.

How are cam mechanisms classified by their mode of motion?

We can classify cam mechanisms by the modes of input/output motion, the configuration and arrangement of the follower, and the shape of the cam. We can also classify cams by the different types of motion events of the follower and by means of a great variety of the motion characteristics of the cam profile. (Chen 82)

What is the rise with constant velocity of a cam?

If the speed of the follower is kept at 200 mm/s during this phase of the motion, then the amount of rise with constant velocity is H’=200*0.2= 40mm. During the acceleration and deceleration periods total rise will be 20 mm.