Hofmann Maschinenbau Gmbh

Epb Societe Anoyme

Klaus-Peter Ohms

Alain Freyermuth

Helmuth Graf

A machine for pre-adjusting and balancing a tool-holder, includes a support frame provided with a single rotary tool spindle, a column supporting a dimension-measuring arm, a console displaying the measurements and a protective hood preventing access to a risk area when the spindle is rotating.

Machine for pre-adjusting and balancing a tool-holder

A method of measuring irregularities of a pneumatic tire comprises carrying out first and second measuring runs, each of which involves rolling the tire in an inflated condition in a rotary mounting means under a given preload against a test surface and measuring the reaction forces which occur in that operation in the form of two force fluctuation diagrams. The tire is turned, for example, through 120.degree. or 180.degree. about the axis of the rotary mounting means between the measuring runs and a correction value is ascertained from the two force fluctuation diagrams to compensate for error values resulting from the rotary mounting means.

Method of measuring irregularities of a pneumatic tire

A method of measuring radial and/or lateral run-out of a rotary member, where the rotary member is mounted in a testing machine by a play-compensating clamping arrangement, and rotated. While it rotates the rotary member is sensed in the region of its peripheral and/or lateral surfaces and the result of the sensing operation is used to produce run-out diagrams. First and second run-out diagrams which are turned relative to each other through 180.degree. with respect to the clamping mounting arrangement are combined together, thereby to compensate in the combination diagram for the geometrical measurement errors resulting from the clamping mounting arrangement in the initial diagrams.

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Darmstadt, Germany

Klaus-Peter Ohms