Constant velocity driving means

Details Constant velocity driving means Constant velocity driving means

1977-08-29

1979-03-27

Ruggiero, Joseph F.

Boots, shoes, and leggings

235 92CT, 318599, 318601, 318603, 364519, 364565, 364900, G06F 1546, G05B 1928

Patent

active

041469224

ABSTRACT:
An apparatus and method for controlling the velocity of a moving member like, for example, a print head carrier. The apparatus includes motor means which drives the carrier along the platen of a printer. The motor is driven by alternately energizng it during an "on" period and deenergizing it during an "off" period. A velocity detector detects the actual velocity of the carrier and a processor determines whether an overspeed or an underspeed condition exists relative to a desired velocity. A counter capable of counting pulses relative to the on and off periods receives the output of the processor and is utilized to effectively shorten or lengthen the "on" period, respectively, whenever an overspeed or underspeed condition exists.

REFERENCES:
patent: 3482155 (1969-12-01), Fredriksen
patent: 3617715 (1971-11-01), Dummermuth
patent: 3793511 (1974-02-01), Bala et al.
patent: 3828168 (1974-08-01), O'Callaghan et al.
patent: 3947738 (1976-03-01), Oliver
patent: 3986091 (1976-10-01), Quiogue et al.
patent: 3987282 (1976-10-01), Lau et al.

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