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    Variable Frequency Drive - Optimum lathe VFD problems - irregular, stuttering speed

    Hi Folks, this is a preliminary, looking for anyone who has come across a similar issue before, before I start trying to reverse engineer the PCB etc. (Which I'm not a big fan of as it would really need live testing.) I have a 230V AC 50Hz (single phase) Optimum Lathe, which has a variable...