Proportional control for guidance system

Details Proportional control for guidance system Proportional control for guidance system

1975-12-01

1978-07-04

Schaefer, Robert K.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318369, 318480, H02P 310

Patent

active

040991105

ABSTRACT:
A guidance system for positioning a welding apparatus with respect to a seam or joint to be welded by sensing changes in the surface of the seam. The torch of the apparatus is mounted upon and positioned by a motor-driven cross-slide providing both horizontal and vertical movement.
A probe is adapted to follow the reference surfaces. Two variable resistors within the probe detect horizontal and vertical deviations of these surfaces. A voltage on each variable resistor is used to generate pulses which are applied to a SCR network through which power is supplied to the corresponding slide positioning motor. The voltage supplied to the motor corresponds in magnitude and polarity to the deviation in the direction of the path being followed by the probe and welding apparatus.
The invention also includes a circuit for disabling the motors when the respective cross-slides reach the limits of their travel.

REFERENCES:
patent: 3286148 (1966-11-01), Henderson
patent: 3738297 (1973-06-01), Sangiorgi
patent: 3869653 (1975-03-01), Masuzawa et al.

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