圆上泽文大学 CAM Nomenclature ▣Prime Circle The prime circle is the smallest circle that can be drawn so as to be tangential to the pitch curve,with its centre at the cam centre. ▣Pressure AngleΦ >It is the measure of steepness of the cam profile.The angle between the direction of the follower movement and the normal to the pitch curve at any point is called pressure angle. >Want<300 for translating and <350 for oscillating followers ▣Pitch Point The point corresponds to the point of maximum pressure angle is called pitch point,and a circle drawn with its centre at the cam centre,to pass through the pitch point,is known as the Pitch circle. 圈上泽夫道大学 Pressure Angle When =0 >All transmitted force goes into motion of follower None into slip velocity ▣When-90° No motion of follower 】Typically between0and30° >For translating followers,avoids excessive side load on sliding follower 3131  Prime Circle The prime circle is the smallest circle that can be drawn so as to be tangential to the pitch curve, with its centre at the cam centre.  Pressure Angle Φ  It is the measure of steepness of the cam profile. The angle between the direction of the follower movement and the normal to the pitch curve at any point is called pressure angle.  Want Φ <300 for translating and Φ<350 for oscillating followers  Pitch Point The point corresponds to the point of maximum pressure angle is called pitch point, and a circle drawn with its centre at the cam centre, to pass through the pitch point, is known as the Pitch circle. CAM Nomenclature Pressure Angle  When   All transmitted force goes into motion of follower  None into slip velocity  When   No motion of follower  Typically between and  For translating followers, avoids excessive side load on sliding follower