DIY Longplay motors. Electric Wizards Welcome!

[Greg May]

Hello

I spend some time surfing around on some older posts regarding a LPU for S8. I found that most people referenced a Spondon longplay unit. When people spoke about basing a DIY unit off of the Spondon unit, they had mentioned the motor was an RS 255-9611 model that is 12 volts and has a 41 RPM. That motor has since been discontinued.

Can anyone recommend an alternative?

I did find something like this... https://www.omc-stepperonline.com/br...201213500-g256

Could that be used to work?

Has anyone had experience building one of these from scratch? I can't imagine the logic would be super complicated. Something to control the RPM and Forward/Rewind. (Honestly I do not even require rewind, as I would probably use rewinding bench)

Any tips or pointers from someone who has done this before would be super helpful.

Thanks!

[Dominique De Bast]

Not what you're looking for because it looks to difficult to built for the random collector, and also the page is in German, but just to make us dream : https://super8-welt.de/tipps-tricks/...-bauanleitung/

[Greg May]

It doesn't look terribly daunting except for the portion that they are using the arms from actual projector parts. Ideally I would not want to strip a projector for parts to build it. I would probably look to get spare parts on eBay that could replicate the spindles on a projector arm.

So this is cool to look at and get an idea of things at least of how someone else accomplished it.

[Dominique De Bast]

Glad you liked the link.

[Steve Lee]

Hi Greg.
This is a unit I put together a couple of years ago. It's not perfect by any means, but it can do the job and has never let me down.
It can sit on top of the majority of projectors by clamping onto the handle with a metal plate and a couple of wing nuts.
The motor is a 12v dc 1000 rpm (6 € from ebay) and drives the takeup via a timing belt with tensioner, and is controlled by a Speed Control potensiometer.
As I have found out, even using 800m Fumeo reels it doesn't require very much torque to keep the film taking up on the takeup reel.
I was going to redesign it but have never got around to doing the job.
It's just an idea.





Steve

[Greg May]

Steve, this looks like a perfect solution. Do you have any notes on parts/plans you used?

Belt part numbers, potentiometer part no, etc. ?

Metal measurements?

This looks like something I would be willing to take on.

Thanks!

-Greg

[Steve Lee]

Hi Greg.
I am afraid I don't have any drawings or plans for this, as I made it up as I went along.
All of the aluminum was purchased from a local DIY shop, with all of the component parts coming from Ebay. I also 3d printed the super 8 reel hubs.
The problem is that all of the dimensions for the materials are going to be different in the U.S from those in Europe.
Depending on the machine this is going to be used with, the top plate that sits on top of the projector could extend pass the back in one piece of metal to hold the take up reel horizontally. Similar to the take up on a Fumeo, where the take up reel sits behind the projector rather than above.




All of this was trial and error. At the end of the day is it boils down to constructing something that can hold two reel in alinement with the projector, with one of them being motorised. there's not a lot more to it than this.
I wish you all the best.

Steve