| 摘要 |
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.
|
