[GreenKeys] M15 How to disable unshift-on-space?

drlegendre . drlegendre at gmail.com
Fri Sep 18 23:59:20 EDT 2015


Wow, so the household fuse is correct - that's just nuts! Maybe I'll pull
it and bypass with a 1A slow-blow and maybe a CIL to deal with inrush
currents. The present arrangement just isn't what I'd call proper
'protection'..

In other news, I think I've corrected the aberrant behavior. And yes, it
does seem like it's all down to that very fine clearance between the cutout
lever and the vertical extension of the SP function lever. I added a few
turns of solid metal foil tape to the little dog-leg on the end of the
cutout lever, to reduce the clearance to nearly nil.. maybe 0.002 or so.

And the USOS is gone, at least for now. Obviously I have a lot more to
learn about this mechanism, but for now, I'm stunned that such a tiny
little gap could allow the unwanted behavior. My hunch is that something
else, somewhere, is either improperly adjusted, improperly installed, or
just plain worn. Very surprising, but again, I have much to learn.

I will post a pic of the connector box in a few minutes. But for now, the
machine is behaving as I'd like... =)

On Fri, Sep 18, 2015 at 10:09 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

> All the ones I've seen use the screw-type household fuse, except it's
> an odd value like 6 1/4 amp slow-blow.  Remember that the motor draws
> much more starting current than running current.  Also some installations
> include a 120VDC power supply, and there is often a convenience outlet
> on the side of the base where the repair guy can plug in a soldering
> iron or a light fixture.  Not that I'd want to be soldering on the wiring
> while it is plugged into the power line.
>
> The bare machine doesn't care about polarity.  Those which include a
> polar relay on the base do.  And there are some variables like a motor
> control relay that is controlled by polarity.
>
> Can you send a picture of the Bell System box you are talking about?
>
>
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