Cutting system controls, including height control

Details Cutting system controls, including height control Cutting system controls, including height control

2006-07-04

2006-07-04

Paschall, Mark (Department: 3742)

Electric heating

Metal heating

By arc

C219S121560, C219S121540

Reexamination Certificate

active

07071441

ABSTRACT:
A cutting system is disclosed for a plasma cutting torch movable by a driver relative to a work piece along a Z-axis. During cutting, the torch provides an arc voltage proportional to a distance between the torch and the work piece. A height control feedback circuit is connected to the torch and includes sensor circuitry providing an electrical signal proportional to the arc voltage and an analog-to-digital converter for converting the proportional signal to a digital signal. A computer and controller, including controls for selecting a desired height of the plasma torch, receive the digital signal, compare the actual height to the desired height, and actuate the driver to move the torch to within a preset limit of the desired height.

REFERENCES:
patent: 6028287 (2000-02-01), Passage et al.
patent: 6359251 (2002-03-01), Picard et al.
patent: 6772040 (2004-08-01), Picard et al.

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