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Topic: Elmo ST-1200 Delay in Motor Starting
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Steve Klare
Film Guy
Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003
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posted June 22, 2015 10:05 AM
I plan to do a thread on my experiences restoring the rubber surface to the shutter wheel (especially if it works out!). So far it looks good, but I haven't run it for more than a 10 minutes at a time yet.
Something I'm not clear on: I don't see a motor shaft poking out the right (non-fan and pulley) end of the motor. My machine looks exactly like Janice's so I think I'm just misinterpreting. Maybe I need to look more carefully. (Everything is packed so close together!)
I've never had the delayed start problem with my machine, but have suffered from the gradual rise towards (never quite "to") 24 FPS.
-so I would like to find this lube point and kill off yet another contributing factor to pokey-projection.
This is an irritating problem: you project reel #1 and everything sounds bassy, musical tempos a little downbeat, and actresses a little masculine sounding, but your ear and your brain compensate. Now you do a changeover to a second machine for reel #2 and until you re-compensate the actors sound like there's just a pinch of helium in the air!
This series of threads could actually turn out to be important: I know a number of us that have been limping along with these problems for years, just maybe we're going to get these machines back up to 24 FPS at last. I'm sure 40 years ago when they left the factory, they were all full speed.
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All I ask is a wide screen and a projector to light her by...
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frank arnstein
Jedi Master Film Handler
Posts: 534
From: Gold Coast. Australia
Registered: Jan 2005
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posted October 04, 2015 04:58 AM
replying to Matt,,
as I stated a few posts back, and as Tom has also told us previously,
"if the slightest bit of oil gets onto the small rubber roller that drives the flywheel shaft, then the friction is lost and it wont work again till its sprayed with evaporative cleaner then dries clean and bone dry".
So spray the flywheel shaft and rubber driving roller with iso-propyl or other suitable evaporating spray, where they press against each other, till they are flushed clean and then make sure they are bone dry before retesting its operation. Don't inhale the fumes or ignite them accidently.
Regarding the fact you are running without a shutter belt... I am doing the same with mine and am perfectly happy with the sound result. I believe they run smoother, quieter and with less vibration if there's no shutter belt.
If you think yours still has warbling sound then try adding a bit more spring pressure to the shutterwheel as Janice did, and see if that's all it needs to drive smoothly without slip. Also clean the sound head if you haven't done that yet.
Good luck and keep us informed of your progress.
dogtor frankarnstein ![[Smile]](smile.gif) ![[Wink]](wink.gif)
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Mathew James
Jedi Master Film Handler
Posts: 740
From: Hamilton, Ontario, Canada
Registered: Dec 2014
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posted October 04, 2015 02:32 PM
Thanx very much for replying Frank. My son and I are working on it right now!
One thing that is puzzling me is that I do not see any way that the flywheel would turn...that is, while in position 2, with no film, the roller(which has now been cleaned) does not spin, nor do i see the shaft moving..so I am puzzled at what drives the flywheel ultimately...
After cleaning, we are still not seeing the flywheel spin, but know we must be getting close to homing in on the problem and thank you very much in the meanwhile for your help! We will continuing on this and perhaps we will self discover the issue in the meantime....
Matt
UPDATE: My 12 year old son to the rescue!!! This where we fathers start to appreciate our great inheritance in offspring...especially as eyes fail and others are needed! Joel has determined that I have observed and cleaned the wrong rubber I was at the front of the machine where the roller at the endmost of the shaft is, but he has pointed out that there is indeed another roller, and looking at it it is indeed dirty!!!
I will report back with good news shortly i am certain!
*Steve, show this pic to your son so he knows he has a friend in super 8's!!!
[ October 04, 2015, 04:26 PM: Message edited by: Mathew James ]
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Cheers,
Matt 📽
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![[Frown]](frown.gif)
Could this because of no rubber on shutter-wheel? Even when playing i think i heard some warbling of the sound...
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