Voltage sensing unit can be used to detect short circuit. During the short circuit, the voltage across tool and workpiece is zero.
The idea is once correctly.
The problem of μPECMM it is that I am using pulses in the ps and ns range and the voltages used are very small. Gap voltage is 0 V is only achieved after a certain time. Also, it will not be quite 0V, but accept a voltage value of the order of galvanic voltage differences.
It is the question not only measure simple but also timely to process the value for a control.
I know that all those with the μPECMM (Pulse Electrochemical Micro Machining - Double Layer reloading) is aware of this problem, but does not discuss because of the mostly good surface results.
But it would be good to know whether the shorts have a signified effect, and whether the impact on larger working surfaces (higher operating currents) is stronger. This is an important issue with respect to the increase in productivity of μPECMM.
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