[GrizHFMinimill] Re: Mill controller woes

I have an earlier X2 about 12 years old. I went through 2 controller boards in 12 months and built my own after that. I don't know what happened to the first board but suspect a power surge. The replacement board stopped working within a week due to a dry solder joint on the large inductor coil. I could see that the bottom pad had a good joint but the top pad takes all the power and had vaporized by arcing to the inductor leg. I'm suspicious that there was no solder on this pad.This would have been hand assembled in China and the technician soldered the bottom pad but would've found it difficult to reach the top pad with the iron. The Quality Assurance on these controllers is poor although if you analyze the circuit it has all the necessary features of a good controller.

--- In GrizHFMinimill@yahoogroups.com, "v_flad" <flad@...> wrote:
>
>
> Chuck,
> I had a simular problem with the stock control board. I found a KBLC board on ebay, and havn't looked back. much better control, and more power. I adjusted max to 115VDC, on a 110 motor, and it works real well. I have the extra power if I need it. It cost me about 15 bucks, and an afternoon.
>
> Good luck to you!
>
> vFlad
>

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