As I understand things, you'd have less torque on a larger diameter hub.
Think of a pencil and wrapping film on that, it would be like a gear, and
easily wind the material with minimum effort.
A large hub, like a large gear, would need more effort to wind anything.
Anyway, physics of take up reels aside, the problem sounds almost
certainly the TUP clutch assembly inside the machine. These routinely slip
out on these machines/models.
Of course the single timing belt on the Eiki design means everything is
connected to everything else so you'd be wise to get the service manual
and learn how to lube every geared wheel, using correct lube in each case
and take apart and lube the cam tank.
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On Tue, 26 May 2020, Julian Antos wrote:
A bigger hub does help, but the heavy takeup reel is also taking up better
because takeup is designed to increase tension as the reel gets heavier. If
there is only adequate tension at the start using a heavy reel, you’ll
probably have less than you need by the end of the reel - especially if a
print is warped.
On Tue, May 26, 2020 at 7:17 AM Scott Dorsey <klu...@panix.com> wrote:
The heavy takeup reel isn't taking up better because it's heavy,
it is taking
up better because the diameter of the center hub is larger.
Just fix it.
--scott
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--
Julian Antos
Chicago Film Society
www.chicagofilmsociety.org
773 827 8991
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