Workpiece rotational speed controller for cam grinding machine

Details Workpiece rotational speed controller for cam grinding machine Workpiece rotational speed controller for cam grinding machine

1979-06-01

1981-04-21

Smith, Gary L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51101R, 5116571, 318571, 409168, B24B 1912

Patent

active

042624541

ABSTRACT:
A workpiece rotational speed controller having a pulse counter responsive to a pulse signal generated from a pulse generator for indicating the actual angular position of a cam shaft during grinding on a cam grinding machine and a comparator for comparing a count value of the counter with any one of set values which are set in a plurality of digital switches to designate respective speed change positions. A region detection counter is further provided, which counts any coincidence signal from the comparator so as to enable a command voltage generator to apply to a servomotor for cam shaft drive a command voltage that changes step by step in correspondence to the region detection counter output. This counter output is also applied to a gate circuit, which is thus enabled to selectively apply the set values of the digital switches to the comparator.

REFERENCES:
patent: 3586953 (1971-06-01), Markkanen
patent: 3843915 (1974-10-01), Helmbold
patent: 3956617 (1976-05-01), Schmidt
patent: 4094105 (1978-06-01), Hatanaka et al.
patent: 4102082 (1978-07-01), Katsumi et al.
patent: 4110676 (1978-08-01), Enomoto
patent: 4122634 (1978-10-01), Nishimura

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