| 摘要 |
<p>PURPOSE:To make voltage of a working power source constant as well as to prevent electric discharge machining from getting worse even if voltage of a commercial power source is varied to some extent, by setting an electric discharge machining power source down to a voltage stabilizer. CONSTITUTION:If a working current flowing between a tool electrode E and a workpiece W is a low current, for example, such one in a range of less than 10A, a selector switch 14 is closed and a voltage stabilizer 13 is connected to a circuit. With this connection, an output voltage of the stabilizer 13, that is, the constant voltage set to an optional value is connected to the tool electrode E and the workpiece W through a switch 10 and a discharge current limiting resistor 11. Therefore, the setting working current peak value is maintained irrespective of voltage variations in a commercial power source, thus high accurate finishing can be done.</p> |
