| 摘要 |
In a processing machine which operates with an arc, for example, a burning cutting installation, the arc current is measured and regulating signals are derived from the measurement value for the purposes of regulating the tool-workpiece spacing. In that procedure the analog measurement value is converted by a converter into high frequency signals whose frequency corresponds to the respective measurement value, the high frequency signals are fed to a regulator and therein are converted again into analog and/or digital signals. Also provided is a capacitive or inductive spacing measuring means which is also connected to the converter so that the arc current measurement values and the spacing values of the capacitive or inductive measuring arrangement are processed by the same converter means and evaluation circuit.
|
