[GreenKeys] Woot! M15 has arrived - and I am already STUCK!

[drlegendre .]

I've done some more digging around, and came up with something I can't make
sense of.

There's a toggle switch on the typing unit, with a screw-down locking tab
to prevent accidental movement. This seems to be the DPDT switch which
configures the solenoid coils in the holding magnet as either series or
parallel connection. The switch was set to 'series' and I measured ~190R at
terminals #45 & #46 which I believe are correct for the selector.

I was expecting a 55R winding.. but got 190R. Flipping the switch dropped
the reading to about 50R, which is close to what I had initially expected -
so OK.

Trouble is, it takes way more than 60mA to pull in that magnet. When I
connect the 120V / 60mA supply, it just maxes out the current and sits
there. Using a bench power supply, I found that it requires more like 265mA
to pull in the magnet.

What's going on here?

On Sun, Sep 6, 2015 at 11:51 AM, drlegendre . <drlegendre at gmail.com> wrote:

> Thank you, Jim! Just digging into it now..
>
> On Sat, Sep 5, 2015 at 10:22 PM, Jim Haynes <jhhaynes at earthlink.net>
> wrote:
>
>>
>
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