On 26 September 2014 04:28, Peter C. Wallace <p...@mesanet.com> wrote:

> The 7I76 spindle analog out circuitry expects a regulated 5V to 12V supply,
> your supply has about 10K Ohms of series resistance so is not a suitable
> voltage source. You can use an isolated external supply of 5 to 12V

It might be important to stress "isolated" there. The KBIC controller
float the pot at +100 volts or so.

One solution is probably a small 12V - 12V isolated DC-DC converter
connected to the normal 12V DC.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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