Re: syncing 2 16mm projectors

From: Robert Schaller (email suppressed)
Date: Tue Sep 25 2007 - 22:40:26 PDT

For what it's worth, I actually have one of these systems that "died out in
the early 70's," a Moviola sync system that allows me to sync up to 16
projectors, and I have about 9 with the piggyback sunc motors, old Bell and
Howell JANs and Pageants. Works great, and I have made some use of a
3-projector part of it, and the whole thing only twice. It's rather large
and uses a lot of electricit. It was used in World's Fairs for it's
spectacle value, and hard to do solo without a big crew, etc.. But it
probably wouldn't run at 50Hz, and I'm in Colorado...

On 9/24/07 5:37 PM, "Jeff Kreines" <email suppressed> wrote:

> 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
> __________________________________________________________________
> For info on FrameWorks, contact Pip Chodorov at <email suppressed>.

For info on FrameWorks, contact Pip Chodorov at <email suppressed>.