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Topic: Strong Platter Rattle

Joe Redifer
You need a beating today

Posts: 12859
From: Denver, Colorado
Registered: May 99

posted 10-14-2002 12:38 PM

I have noticed that Strong platters seem to rattle every time I have used them up until I got a couple of brand new units. The new ones did not rattle... until now, and they are only a few months old. It is always the take up deck and always at the start of the movie... when not much film is weighted down on the deck.

It's not a huge gigantic deal, but does anyone know what causes this and if it can be prevented? Is it the ring rattling against the surface of the deck? Is it something else? Why didn't my brand new platters rattle for the first couple of months?

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Shaun Flichel
Film Handler

Posts: 42
From: Regina, Sask., Canada
Registered: Sep 2002

posted 10-14-2002 01:00 PM

Joe, Rattling in those platters is completly normal. I've been told it is just the rivets vibrating, like I guess a little gap somewhere around them allowing a little vibration, it should quiet down with a couple minutes of film taken up.

Shaun

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Paul G. Thompson
The Weenie Man

Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000

posted 10-14-2002 03:41 PM

Joe, rattling is a normal way of life for those things. In addition to what Shaun said, lot of the rattles come from that funky motor support bracket and motor release bracket.

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Alan Gilbertson
Expert Film Handler

Posts: 148
From: Carpentersville Il 60110
Registered: Nov 1999

posted 10-14-2002 04:12 PM

We had the same problem with some of our as well. I drilled out the rivets and put in screws with locking nuts.

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 10-14-2002 04:21 PM

I see this varies drastically from tree to tree. It doesn't seem to matter which particular deck is taking up, but as an example #5 only makes a minor amount of noise while #6 is so loud customers complain. I am *guessing* this is caused by the center ring rattling on the deck of the platter, but changing center rings does not alter the loudness of the problem.

The only thing I have found that works is using the larger 19" center rings. I do have another idea, but I won't post it until I try it out.

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Sean McKinnon
Phenomenal Film Handler

Posts: 1712
From: Peabody Massachusetts
Registered: Sep 2000

posted 10-14-2002 10:33 PM

I may be way off here but I think it is the rubber drive belt slipping against the deck when it first starts to take-up that is why using the 19" ring does not produce this (It doesnt have to spin as fast at first)

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 10-14-2002 10:58 PM

Nope, I'm at a theater with Strong platters and I tried out my theory. It IS the center ring. I'll post a pic of the fix later (maybe even tonight).

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 10-15-2002 08:30 PM

For all of those who say duct tape fixes everything, you are right.

Now you have to look closely, but I have placed black Permacel gaffer's tape (similar to duct tape) on the bottom edge of this Strong center ring. It is just thick enough to prevent the ring from clanging around on the deck until enough film gets on the ring such that the film itself becomes the isolation pad.

Cheap and dirty? Sure. Does it work? Yep.

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Steve Kraus
Film God

Posts: 4094
From: Chicago, IL, USA
Registered: May 2000

posted 10-16-2002 12:19 AM

Gaffer tape is so much better than duct tape for most things people use the latter for that I'm surprised that it's not sold more widely. Granted it's expensive but people don't know what they're missing. I'd bet it would do a better job of sealing ductwork without quickly drying out, too.

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Josh Jones
Redhat

Posts: 1207
From: Plano, TX
Registered: Apr 2000

posted 10-16-2002 09:13 AM

even our christie platters rattle, and its been doing it since it was brand new.

Josh

------------------
"Film is made of silver, video is made of rust"
'nuf said

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Shaun Flichel
Film Handler

Posts: 42
From: Regina, Sask., Canada
Registered: Sep 2002

posted 10-16-2002 12:19 PM

Brad, Thats a good idea, just two thinks that im curious about, and I'm not saying your wrong, as I haven't tried that. But wouldn't say 10 wraps of milar leader that tightly around the ring plus the weight of the "yo-yo" putting tention on the ring be enough to stop the ring from anykind of movement causing these vibrations? I'm referring to normal running here. And as far as show breakdown is concerned, wold this not cause a off balance of the print, i know it can't be any worse than strongs perfectly balanced center ring

. Or maybe I missed a 2nd peice you have placed to counter act this.
Just my 2 cents, maybe different platters have there different rattles, as I recall the ones I work with dont sound like a center ring rattling, the other mind boggling part is, the theatres have been open for many years and each deck doesnt do this every run, just when it wants to.

Shaun

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Shaun Flichel
Film Handler

Posts: 42
From: Regina, Sask., Canada
Registered: Sep 2002

posted 10-16-2002 12:21 PM

Sorry bout the typo's, i just woke up........

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William Leland III
Master Film Handler

Posts: 336
From: Charleston, SC,
Registered: Aug 2002

posted 10-16-2002 12:47 PM

i noticed those same rattles with strong platters, also. what i think is causing the rattle is the weight if the film, if u press slightly down on the platter taking up, the rattle will stop. you are applying a little extra weight on the platter and the rattle goes away. the ring in my experience has no effect on this rattle sound. i've found out if u wait until the policy goes threw the rattles goes away.

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 10-16-2002 12:48 PM

Josh, you need to change out the platter drive wheel on your motors if you are hearing a loud rumbling noise with an AW3.

Shaun, no 10 wraps is far from enough. Some of the platters don't make much noise at startup, others are loud enough to get customer complaints from inside the auditorium, hence my reason to find some kind of a solution. There are 6 pieces of tape evenly spaced out on the ring. There is no balance issue.

William, film itself sitting on a platter cannot cause a metallic rattling sound. It is the center ring banging on the deck of the platter, as in metal against metal. The reason the noise goes away after 10 minutes is because there is enough film on the deck to act as a cushioner.

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Ron Fleming
Film Handler

Posts: 26
From: Eastlake, OH, USA
Registered: Sep 2001

posted 10-16-2002 01:30 PM

Your correct the rattling does go away after enough film has been taken up. But man is it annoying. Maybe the holes that the ring set in after so many runs wear to a larger size, hince the rattling of the ring.

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