Abstract: An apparatus for in-situ dressing of threaded type grinding wheels that is more versatile in operation than conventional operator-controlled equipment. The grinding wheel and dressing tool posts are driven by respective motors controlled and synchronized exactly via a fully electronic control circuit, and the grinding wheel motor associates directly with the axis of the grinding wheel in conjunction with two separate encoders, designed to generate dissimilar pulse frequencies; the two encoders can be switched in and out to suit the respective requirements of grinding and dressing operations, so that the output pulse frequency does not rise beyond a level which can effectively be monitored by the control circuit.

Abstract: The device, which controls operation of the loading magazine in an automatic machine tool and is capable of measuring the handling diameter of single workpieces fed into the machine, comprises a set of jaws located between the magazine and the automatic feed facility, and a transducer which monitors the distance separating the jaws when encompassing the workpiece and relays a corresponding information signal back to the unit which controls the operation of the machine tool as a whole.

Abstract: A method is disclosed which envisages the use of a vertical axis equipment magazine with a number of stations, each occupied by a workholding device, and a change arm that is rotatable through a horizontal plane and which picks up devices singly from the magazine and transfers them to a work rest. The work rest itself is provided with a flat horizontal surface and a vertical cylindrical surface serving to support and locate the device, respectively, and a scraper is employed for the purpose of keeping these surfaces clean. A sensor detects any error in the position of the workholding device relative to the two surfaces.