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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Christie AW-3 - Bodine Motor Squeaks

   
Author Topic: Christie AW-3 - Bodine Motor Squeaks
Paul Konen
Jedi Master Film Handler

Posts: 981
From: Frisco, TX. (North of Dallas)
Registered: Jun 99


 - posted 07-17-2000 08:39 AM      Profile for Paul Konen   Email Paul Konen   Send New Private Message       Edit/Delete Post 
Some of our motor are squeaking and was wondering if anyone has any ideas to stop it.

I had one to blow out the dust and reverse the brushes but two things are difficult with this. One are the plastic caps. The are either too tight or the largest screwdriver I have just chips away at the plastic slot. Two. The brushes aren't reversable. Either top to bottom or front to back. Can't even pull them out of the slot without disconnecting them.

So, would a shot of WD, FilmGuard or 3-in-1 oil on the shaft by the bearing do any good or do I just live with the squeaky motor.

BTW, Christie has a different material for the motor puck that doesn't deform when the motor has been resting. These new pucks run smooth and quiet. (Thanks BEVAN)

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Joe Redifer
You need a beating today

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


 - posted 07-17-2000 03:27 PM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
Yes, Bevan designed the pucks himself. They are officially called Bevan-Pucks.

Some of my motors have always squeaked. I have not found a way to stop it. I am assuming that it was caused by too much dust during construction, but I'm not 100% sure on that. Spraying oil or FilmGuard on it doesn't seem to help.


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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 07-17-2000 09:16 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
Take one of the squeeky motors to a reputable motor repair shop and have it checked out. The motors use very common bearings that are easily replaced. They sometimes get full of graphite from the normal brush wear that happens in any motor. It could also be that the commutator is worn. It can be cut down in a lathe to clean it up, and new brushes installed. Also check the drive roller and see if it is squeeking. The bad thing about these Bodines, as is about most of them is that the armature and or field coil cannot be ordered as replacement parts as it is an OEM Bodine motor. Many of these are this way. The older AW-2 motors were also OEM only.
NEVER spray any oil or equivelent lube into any motor. Simply add a shot of Film-Guard into your nightly dose of Geritol, watch Joe's video 6 times in quick sucession and the squeeking motors will no longer matter!!
Mark


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Russ Kress
Expert Film Handler

Posts: 202
From: Charleston, WV, USA
Registered: May 2000


 - posted 07-17-2000 11:45 PM      Profile for Russ Kress   Author's Homepage   Email Russ Kress   Send New Private Message       Edit/Delete Post 
We use Ballantyne Pro-35s (ha ha, I've already heard that one) *g*. We generally use a GE motor with them. The GEs replaced (in most cases) Bodine motors which had failed.

Usually, the problem was with the centrifigal switch that switches off the start winding.

Anyways, every time I see one, I make a mental note of some future holiday/birthday/graduation/family event that I will miss while changing one out.

THEY SQUEAK TOO!!!?

Russ

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Dustin Mitchell
Phenomenal Film Handler

Posts: 1865
From: Mondovi, WI, USA
Registered: Mar 2000


 - posted 07-18-2000 12:13 AM      Profile for Dustin Mitchell   Email Dustin Mitchell   Send New Private Message       Edit/Delete Post 
"Bevan-Pucks"?
He's got a whole line of crap, doesn't he?

(Of course by crap I'm not implying its bad, just using another word for stuff, things, whatever.)

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Joe Redifer
You need a beating today

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


 - posted 07-18-2000 12:52 AM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
Uh oh. Now you've gone and PISSED BEVAN OFF!!!! I'd lay low for a few days if I were you.

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Brad Miller
Administrator

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


 - posted 07-18-2000 02:50 AM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Paul,

How long have the new Bevan-Pucks been installed on your platters? Bevan was nice enough to send us one of his pucks for Joe to review. Joe has insisted they be tested side by side with a never used Bevan-Putty-Puck (the old style made from genuine Silly Putty carefully molded into that perfect "almost circle" by Bevan's own hands) not on the theater's platters, but on the AW3 in my screening room. Since it does not get used very often (as opposed to testing it at the theater), it will truly be an excellent test of the new Bevan-Puck. I can tell you from experience that a Bevan-Putty-Puck will completely deform within 3-4 months on my AW3 bad enough you can feel it "thumping" in the floor. At the last theater I worked at, some of the Bevan-Putty-Pucks were so bad you could hear them in the auditorium...and yet the projector could NOT be heard!

I'm REALLY hoping these new Bevan-Pucks do what they claim.



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Paul Konen
Jedi Master Film Handler

Posts: 981
From: Frisco, TX. (North of Dallas)
Registered: Jun 99


 - posted 07-18-2000 09:13 AM      Profile for Paul Konen   Email Paul Konen   Send New Private Message       Edit/Delete Post 
The new Bevan-Putty pucks are slowly being installed when I can. (I lift the empty platter deck up high enough to get the old one off. Too damn hard to take the motor off, and then put the entire motor back on) Anyway, the original ones are the yellow-ish kind and thump fairly bad.

Why can't they be made of fairly hard black rubber like tires? Must be they can get the proper milage rating out of them.

Paul.

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Paul Konen
Jedi Master Film Handler

Posts: 981
From: Frisco, TX. (North of Dallas)
Registered: Jun 99


 - posted 10-11-2000 09:08 AM      Profile for Paul Konen   Email Paul Konen   Send New Private Message       Edit/Delete Post 
I got the motors to stop squeaking. Pay careful attention to the orientation of the cord and everything else.

1. Remove motor from platter
2. Remove top plate from motor
3. Remove large plastic access caps and pull brushes out a bit.
4. Disassemble motor by removing the two long phillips head screws, carefull, there are nuts at the top.
5. Clean bottom part of dust and such.
6. Use 220 grit paper and clean the $#%& off where the brushes contact the motor. (Armature, commutator, ??)
7. Reassemble. Again, watch orientation. Otherwise, it will go the wrong way.
8. Reattach to platter and listen. Still listening. Should be nice and quite.

I actually to go and look to be sure one was running because the squeaking was gone.

4 motors done, 68 to go.

Paul.

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Greg Mueller
Phenomenal Film Handler

Posts: 1687
From: Port Gamble, WA
Registered: Jun 99


 - posted 10-11-2000 09:30 AM      Profile for Greg Mueller   Author's Homepage   Email Greg Mueller   Send New Private Message       Edit/Delete Post 
Can someone tell me the operating volatage of this motor and it's max RPMs and other technical stuff. I'm going to be doing a mod to my homemade tower and need a dc motor or two to do the things I want to do.

------------------
Greg Mueller
Amateur Astronomer, Machinist, Filmnut

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