Adjustable stroke device with cam

A method of adjusting a stroke of a random orbital machine comprising:

• coupling an adjustable stroke mechanism to a random orbital machine, the adjustable stroke mechanism comprising:
• a housing having a central axis and a wall defining a cavity;
• at least one counterweight movably disposed at least partially within the housing;
• a backing plate mount assembly disposed at least partially within the housing;
• the backing plate mount assembly including a mechanism for attaching to a workpiece;
• a stroke adjustor is axially movable along the central axis and is rotatable about the central axis coupling the at least one counterweight with the mounting assembly;
• adjusting the stroke adjustor;
• moving the counterweight and mount assembly with respect to one another;
• variably adjusting a distance between the counterweight and the mount assembly;
• and
• variably adjusting a stroke radius of the mechanism with respect to the central axis of the housing.

A rotating tool comprising:

• a housing and a motor, the motor including a drive train;
• an adjustable stroke mechanism coupled with the drive train, the adjustable stroke mechanism comprising:
• a stroke adjustor having a wall defining a cavity;
• at least one counterweight movable disposed at least partially in the cavity;
• a mounting assembly disposed at least partially within the cavity, the mounting assembly including a workpiece attachment mechanism;
• the stroke adjustor coupling the at least one counterweight with the mounting assembly, the stroke adjustor is axially movable along the central axis and is rotatable about the central axis enabling the at least one counterweight and mounting assembly to move with respect to one another such that a distance between the at least one counterweight and the mounting assembly may be variably adjusted which, in turn, variable adjust a stroke radius of the workpiece attachment mechanism with respect to the drive train.

An adjustable stroke mechanism comprising:

• a stroke adjustor having a wall defining a cavity;
• at least one counterweight movable disposed at least partially in the cavity;
• a mounting assembly disposed at least partially within the cavity, the mounting assembly including a workpiece attachment mechanism;
• the stroke adjustor coupling the at least one counterweight with the mounting assembly, the stroke adjustor including a cam, the stroke adjustor is axially movable and is rotatable, the stroke adjustor enabling the at least one counterweight and mounting assembly to move with respect to one another such that a distance between the at least one counterweight and the mounting assembly may be variably adjusted which, in turn, variable adjust a stroke radius of the workpiece attachment mechanism with respect to a drive train.