Re: syncing 2 16mm projectors

From: Jeff Kreines (email suppressed)
Date: Mon Sep 24 2007 - 16:37:48 PDT

On Sep 24, 2007, at 6:02 PM, xander! . wrote:

> yo lisa - i have an old filmosound with an externally mounted
> "bodine motor" that i believe had been jurry-rigged up like this
> for interlock type purposes...i have not investigated greatly but
> you are totally welcome to it - lmaybe i can take pictures of it
> and send them to someone wiser and more old school than i and they
> could let us know what the probabality is that that was what it was
> made for...(anyone up for such a task?) best - xander

If there's one external motor, it's likely a synchronous motor and
can be used for "common-start" sync with another device using a
similar AC sync motor. An AC sync motor in the US would be 60 cycle/
Hz, for Europe 50Hz, so it wouldn't work in Holland. If there are
two motors, one is a selsyn and one a sync motor -- the selsyns keep
the machines locked together while they get up to speed, then the
synchronous motors take over. Messy, this pretty much died out in
the early 70s...

Jeff "this brings back many bad memories!" Kreines

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