Zero backlash positioning system for a movable linear axis

Details Zero backlash positioning system for a movable linear axis Zero backlash positioning system for a movable linear axis

1989-05-31

1990-07-03

Herrmann, Allan D.

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

33 1M, 74422, 414749, 901 16, 901 21, 475183, F16H 1906, F16H 5528, B25J 502

Patent

active

049380877

ABSTRACT:
A linear axis (cantilevered beam) is longitudinally displaceable relative to its support which, in turn, is displaceable laterally along an overhead frame so as to provide X-Y positioning for pick and place spindles and similar tools which are attached to the beam. A particular structural combination for accomplishing this involves a low inertia servomotor driving a speed reducer which, in turn, directly drives a short endless timing belt which, in turn, intermeshes with and drives a toothed rack in order to provide reliable, with zero backlash, high accuracy X-Y positioning of the tools. Features of the structural arrangement allow the use of component parts requiring much less precision, and thus much less cost, of manufacture than prior art, zero backlash, linear axis positioning systems.

REFERENCES:
patent: 2344078 (1944-03-01), Brissonnet et al.
patent: 2484605 (1949-10-01), Boucher
patent: 3060767 (1962-10-01), Parrett
patent: 3850043 (1974-11-01), Tarbox
patent: 4229136 (1980-10-01), Panissidi
patent: 4274801 (1981-06-01), Herb et al.
patent: 4721005 (1988-01-01), Yoshiji et al.
patent: 4753119 (1988-06-01), Kuspert

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