Very interesting Frank. Yes, you are right that the connections "back" from
the DC input jacks go to the NiCad Control Grip end, but not to the MD end.
That means (I think) that it is not possible to use the relay cord with an
external power supply to power the Motor Drive unless you have a Control
grip attached - and the implication is that had better be the 18V Control
Grip, not the 15V Control Grip!
BUT your point about the M.AC Control Box is off target, because that
REPLACES the Control Grip. You can't connect both to the relay cord, and
thus it couldn't charge the NiCad at all.
Piers
> -----Original Message-----
> From: owner-olympus@xxxxxxxxxxxxxxx
> [mailto:owner-olympus@xxxxxxxxxxxxxxx] On Behalf Of Frank van Lindert
> Sent: 28 October 2003 08:30
> To: olympus@xxxxxxxxxxxxxxx
> Subject: Re: [OM] Control pack charging
>
>
> Mark,
>
> You are right as far as the contact pins are concerned
> (although one of the pins is not connected through to the
> other end of the relay cable).
> But IMHO the implication of this is, that connecting ANY
> power source to the motor drive (e.g. a 16 volt battery,
> without any current limiter at all!) would not only provide
> energy operate it but also at the same time charge the NiCad
> pack continously. Would that indeed be true?
> E.g. using the AC Control box, meant for long term use in the
> laboratory, would keep charging the NiCad for an indefinite
> time. I know that 15-16 volts will probably not harm the
> NiCad Pack, but fresh batteries could give more than their
> nominal voltage... perhaps 18-20 volts. How about that?
> Perhaps many people using a 'strange' DC source did damage
> their NiCad Packs that way already... or am I overlooking something?
>
> Frank.
>
>
> On Mon, 27 Oct 2003 19:34:16 -0500 (EST), Mark Dapoz <md@xxxxxxxxxxxx>
> wrote:
>
> >On Mon, 27 Oct 2003, Frank van Lindert wrote:
> >
> >> unfortunately you cannot use the DC contacts on the relay
> cord; for
> >> charging different pins are used. But rebuilding the thing is
> >> definitely possible.
> >
> >I believe the power contacts on the relay cord already line
> up to the
> >correct pins for charging the control pack. It's not meant
> to be used
> >for that purpose, but it will work. Just remember to use a suitable
> >resistor to limit the current to C/10. I think a 1/2K to 1K
> resistor
> >at 16V was about right.
> > -mark
> >
> >
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