Truss fabrication machine with joystick controls

Details Truss fabrication machine with joystick controls Truss fabrication machine with joystick controls

1990-04-23

1991-09-17

Hornsby, Harvey C.

Presses

Automatic or material triggered control

Of actuating means

100100, 100226, 100269R, 100913, 227152, B30B 1516, B30B 100

Patent

active

050484095

ABSTRACT:
A truss fabricating machine includes a gantry movable along an X-axis and a pressing cylinder suspended from the gantry which is movable along the Y-axis allowing the pressing cylinder to be located above a joint in a wooden truss. The pressing cylinder presses down to seat connector plates into selected joints of the truss. A joystick generates electrical signals proportional to the direction and extent of movement of the joystick by the operator, which are converted to pulse width modulated electrical signals in a driver, whose output controls proportional solenoids that drive infinite positioning four-way hydraulic valves to actuate hydraulic motors that drive the gantry and pressing mechanism along either the X-axis, or through a separate hydraulic circuit, the Y-axis. The pressing cylinder can be moved along both axes simultaneously. When the pressing cylinder is in the desired position, a thumb switch on top of the joystick is actuated, causing the ram of the pressing cylinder to descend until it seats the connector plate. Releasing the thumb switch causes the ram to move upward to the top of its stroke.

REFERENCES:
patent: 3068484 (1962-12-01), Moehlenpah et al.
patent: 3824919 (1974-07-01), Moehlenpah
patent: 3826188 (1974-07-01), Eberle
patent: 3866530 (1975-02-01), Moehlenpah
patent: 3978783 (1976-09-01), Moehlenpah
patent: 4111114 (1978-09-01), Carr
patent: 4262588 (1981-04-01), McDonald
patent: 4679291 (1987-07-01), Schmeal et al.
patent: 4712404 (1987-12-01), Crout et al.

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