Abstract: An imbalance-determining system for a dynamic balancing machine for two-plane balancing of rotary elements such as vehicle wheel-and-tire assemblies includes a chuck and spindle mounted in a spindle housing in vibration-isolation orientation on a machine base. A drive mechanism includes main and auxiliary motors mounted on the machine base. The rotary element is brought to speed by a drive wheel mounted on the main motor to move between a driving orientation in contact with the rotary element and a storage orientation out of contact with the rotary element. A lightweight belt coupling the spindle to the auxiliary motor transmits power from the auxiliary motor to the rotary element. Once the rotary element is accelerated to the desired rotation frequency, the drive wheel is moved out of contact with the rotary element and the auxiliary motor is energized to maintain the rotary element rotation rate at about the desired frequency of rotation with little effort.

Abstract: An imbalance determining system for a dynamic balancing machine for two-plane balancing of rotary elements such as vehicle wheel-and-tire assemblies includes a chuck and spindle mounted in a spindle housing in vibration-isolation orientation on a machine base. The rotary element is brought to speed by one or more drive mechanisms which are mounted on the machine base to move between a driving orientation in contact with the rotary element and a storage orientation out of contact with the rotary element. Vibrational forces resulting from imbalance in the moving rotary element are transmitted through the spindle to the housing. Two vertically spaced load cells are mounted adjacent the spindle housing, and are responsive to forces transmitted through the spindle to generate input electrical signals related to the amounts and locations of imbalance in two planes of the rotary element.

Abstract: An imbalance determining system for a dynamic balancing machine for two-plane balancing of rotary elements such as vehicle wheel-and-tire assemblies includes a chuck and spindle mounted in a spindle housing in vibration-isolation orientation on a machine base. The rotary element is brought to speed by one or more drive mechanisms which are mounted on the machine base to move between a driving orientation in contact with the rotary element and a storage orientation out of contact with the rotary element. Vibrational forces resulting from imbalance in the moving rotary element are trasmitted through the spindle to the housing. Two vertically spaced load cells are mounted adjacent the spindle housing, and are responsive to forces transmitted through the spindle to generate input electrical signals related to the amounts and locations of imbalance in two planes of the rotary element.

Abstract: Apparatus for determining the amount and location of imbalance in an article which is to be balanced about its axis includes a table for receiving the article and for positioning its axis. The table is supported upon a base for substantially free tilting movement generally about a point on a vertically extending axis defined by the base. A number of proximity transducers for sensing the orientation of the table relative to the base are provided. A pair of force coils positioned in quadrature about the axis between the base and the table are responsive to the proximity transducers to apply forces between the table and the base to bring the table and the article which rests thereon into a substantially neutral orientation with respect to the base. The method of the present invention comprises the steps of placing the article on the table with the article axis at a predetermined position thereon.

Abstract: Apparatus for determining the amount and location of imbalance in an article which is to be balanced about its axis includes a table for receiving the article and for positioning its axis. The table is supported upon a base for substantially free tilting movement generally about a point on a vertically extending axis defined by the base. A number of proximity transducers for sensing the orientation of the table relative to the base are provided. A pair of force coils positioned in quadrature about the axis between the base and the table are responsive to the proximity transducers to apply forces between the table and the base to bring the table and the article which rests thereon into a substantially neutral orientation with respect to the base. The method of the present invention comprises the steps of placing the article on the table with the article axis at a predetermined position thereon.

Abstract: Apparatus for determining the amount and location of imbalance in an article which is to be balanced about its axis includes a table for receiving the article and for positioning its axis. The table is supported upon a base for substantially free tilting movement generally about a point on a vertically extending axis defined by the base. A number of proximity transducers for sensing the orientation of the table relative to the base are provided. A pair of force coils positioned in quadrature about the axis between the base and the table are responsive to the proximity transducers to apply forces between the table and the base to bring the table and the article which rests thereon into a substantially neutral orientation with respect to the base. The method of the present invention comprises the steps of placing the article on the table with the article axis at a predetermined position thereon.