Film-Tech Forum ARCHIVE: FP20 take up not up to speed.

This is topic FP20 take up not up to speed. in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Alan Gouger (Member # 543) on 06-21-2010, 07:52 PM:

I have an FP20 and the take up is not up to speed so the film spools off to the floor as the take up reel is not fast enough. The clutch is tight with no slippage. Unless I am missing something the rest of the take up is chain driven so I do not see where there is anyway for this to not be up to speed.
Any ideas are appreciated.

Regards.

Posted by Gordon McLeod (Member # 33) on 06-21-2010, 08:55 PM:

The FP20 take up is for a 5" take up hub

Posted by Alan Gouger (Member # 543) on 06-21-2010, 09:31 PM:

Gordon the one I am using the take up spindle is in the 2k position. I measured the hub of a typical 2k reel and it looks like it is 4.5". I see Goldberg makes one with a 5" hub time to place an order.

Thanks for the help.

Posted by Steve Guttag (Member # 268) on 06-22-2010, 06:15 AM:

For smaller hubs...Kinoton has their "accelerated friction" option. But yes, the standard take up is for 5" and larger.

Watch out on the "clutch is tight with no slippage" thing...clutches are supposed to slip...that is how they work. Make sure the take up is not too tight once you get the correct reels.

Steve

Posted by Stephen Furley (Member # 1277) on 06-23-2010, 05:52 AM:

I had problems with Kinoton taking up on old Kalee spools which have a rather small hub. Ended up putting a bit of scrap film on them, and then a layer of tape, to enlarge the hub slightly.

Posted by Richard P. May (Member # 3598) on 06-23-2010, 09:41 AM:

Steve,
Can you elaborate on the "accelerated friction" option.
Operating FP20s in a lab, it is something of a nuisance not to be able to take up on 3" or 4" cores with split reels.
It is the speed of the takeup with its chain drive, and doesn't seem to have anything to do with friction.

DM

Posted by Tony Bandiera Jr (Member # 2365) on 06-23-2010, 12:34 PM:

Richard, The accelerated friction option is simply a smaller chain sprocket that drives the spindles at the higher speed necessary for small hubs.

Steve can get you part number and price...BTW if you can Steve please post that info here or PM me too as I would like to know how much for my machines at UC Irvine. [Smile]

Posted by Gordon McLeod (Member # 33) on 06-23-2010, 06:58 PM:

The best route is to fit the machine with torque motor takeups like the magnatech version of the FP20 studio machines

Posted by Bill Gabel (Member # 1105) on 06-23-2010, 07:09 PM:

I have a set of the Magnatech version and have no problems with the takeups. [thumbsup]

Posted by Alan Gouger (Member # 543) on 06-23-2010, 07:50 PM:

Was the Magnatech version the entire machine or did or do they sell a conversion kit?
Any pictures?

Thanks guys.

Posted by Gordon McLeod (Member # 33) on 06-23-2010, 09:24 PM:

MagnaTech did mods to the machine and sold it as a studio machine

Posted by Mitchell Dvoskin (Member # 751) on 06-24-2010, 08:29 AM:

The MagnaTech mods to the FP-20's, at least the ones at the Landmark Loews Jersey, consisted of of replacing the feed and takeup slip clutches with electric motors that provide back tension on the feed, and adjustable (1000' or 2000' reel settings) takeup torque. Same concept as an old reel to reel tape deck.

They also made a slight modification to the film gate, so that the skate is moved slightly back at the top when the projector is run backwards, so the film does not jam in the gate. Personally, I have never run them backwards, so I don't know how well it works.