Boots – shoes – and leggings
Patent
1977-01-21
1979-03-20
Smith, Jerry
Boots, shoes, and leggings
156175, 156361, 156425, 242 721, 242DIG1, G06F 1546, B65H 8100
Patent
active
041457404
ABSTRACT:
A filament winding machine includes a servomotor connected to position a filament distributing carriage relative to a rotating mandrel to form a tubular member. An incremental encoder is connected to the mandrel and produces a pulse related output per mandrel revolution. An absolute encoder is connected to the servomotor and provides an absolute position number. The encoders are sampled at a fixed rate. A mathematical calculating circuit reads the incremental encoder and based on a predetermined movement design for the gear drive, the desired winding configuration and the like determines the proper position, which is compared to the absolute encoder reading to produce an error control signal to the servomotor. A preselected sequence of actual position numbers and the corresponding calculated position numbers are continuously updated in a temporary memory. The difference of succeeding pairs provides data for directly computing the rate at which the head is moving and a proper position and thus also the data for computing actual acceleration or deceleration of the head movement. A microprocessor has proper programs with appropriate user specified parameters to produce various winding configurations. The microprocessor provides the calculation of the proper position and determination of the drive signal. Suitable optional control tables such as a cosine table may modify the calculated carriage position to produce any desired motion. Rapid and continuous monitoring permits the system to anticipate necessary correction and thereby provide a continuous and low power level correction of heavy driven elements such as a filament winding head and carriage.
REFERENCES:
patent: 2927258 (1960-03-01), Lippel
patent: 2964252 (1960-12-01), Rosenberg
patent: 3476327 (1969-11-01), Vawter
patent: 4021650 (1977-05-01), Ruble
Budge Daniel C.
McClean William G.
Smith Jerry
Tri-N Associates, Inc.
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