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一般数控线切割机采用晶体管变频电路,随着钼丝放电间隙的变化,自动调整振荡频率,从而控制进给速度,在一定范围内具有适应控制的能力。但是,由于电路的时间常数较大,截止振荡电压太低,难免发生钼丝与工件短路的现象。为了解决这一问题,有些线切割机控制器中设置了短路回退功能,这又使控制机或控制程序复杂化。如能从以下两方面采取措施,则可防止钼丝短路,
General CNC wire cutting machine using transistor frequency conversion circuit, with the molybdenum wire discharge gap changes automatically adjust the oscillation frequency, thus controlling the feed rate, with a certain range of ability to adapt to control. However, due to the larger circuit time constant, the cut-off voltage is too low, it is inevitable that the molybdenum wire and the workpiece short circuit phenomenon. In order to solve this problem, some of the wire-cutting machine controllers have a short-circuit back-off function, which in turn complicates the control machine or control program. If you can take measures from the following two aspects, you can prevent the molybdenum wire short circuit,