This is topic Christie Platter Motor Drive Wheels ? in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.
To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=003861
Posted by Glenn Conatser (Member # 970) on 08-15-2002, 01:28 PM:
Im writing to find out if anyone knows why these new white Christie drive rollers ive been receiving seem to disintegrate into a sticky mess. This sticky residue is a pain in the butt to get off of the platters also. I was told these drive rollers where new and improved and more resistent to the flat spots the old ones would delvelop.Thanks,
Glenn
Posted by Brad Miller (Member # 2) on 08-15-2002, 02:29 PM:
I've yet to see a problem with the new drive wheels. It's those old orange/yellow colored ones that would turn to mush in a few weeks time.Are your axle bearings in good condition? If you hold the motor away from the platter and give the deck a gentle spin, does it turn effortlessly? Also do you have the correct springs to hold the motor against the platter? Often I find people have replaced those for whatever reason and they are putting far too much tension against the platter.
Posted by John Pytlak (Member # 331) on 08-15-2002, 02:39 PM:
Drive wheels turning to a "sticky mess" could be from using some improper cleaning or lubrication solvent on or near the wheels.But I agree with Brad that if the drive wheel is not properly tensioned against the platter, or if the platter does not turn freely, slippage could occur, generating frictional wear/heating of the wheel surface.
Is the "sticky mess" on the driving surface, or is the entire wheel getting soft?
------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
Posted by Glenn Conatser (Member # 970) on 08-15-2002, 07:08 PM:
Thanks John and Brad. I will look into the things mentioned. My tech will be here tomorrow for a diffrent issue and ill trouble shoot some more with him and see what we come up with.Glenn
Posted by Matthew Bailey (Member # 601) on 08-16-2002, 12:18 PM:
I found some of those drive wheels for my AW3 that don't turn to mush. Theyr'e designed mainly for printing presses,other printing equipment,photocopiers,or other types of office equipment. Theyr'e only the same size.
Posted by Manuel Francisco Valencia (Member # 710) on 08-17-2002, 12:47 PM:
Those crappy yellow wheels are the only thing bad about these platters and when I got the new white ones I was so relieved. The core to the wheel is a great improvement, better than those near razor sharp cores of the yellow wheel. Glenn you might want to check your platter calibration. We did have one that went out really quick but it was on the platter that is heavly used for building up and breaking down. My projectionists like to crank the speed up when building up and breaking down. I am getting sense into thier head though.
Posted by Matthew Bailey (Member # 601) on 08-17-2002, 08:36 PM:
I forgot the rollers I mentioned are mostly used for feeding paper, but they should work. They work on my AW3 without any problem. Some have ridges on them across their width which mean they create a mechanical buzzing sound when driving the decks.
Posted by Josh Jones (Member # 447) on 08-18-2002, 12:54 AM:
Our booth is noisy enough without buzzing platters 
JJ
------------------
"Film is made of silver, video is made of rust"
'nuf said
Posted by Adam Martin (Member # 641) on 08-18-2002, 11:42 AM:
W H A T ? ! ?I ' M . R U N N I N G . 3 - D . R I G H T . N O W !
Posted by Gordon McLeod (Member # 33) on 08-18-2002, 12:08 PM:
Adam did you forget to close the hoods 
Posted by Manny Knowles (Member # 1171) on 08-18-2002, 03:07 PM:
When you say that they are "white" are they really white? I've got some that are cream-colored or tan. They're not soft at all. In fact, when I saw them I wondered if they were the right part. (There was also a bad batch about 2 or 3 years ago that were recalled.)
What's the earliest possible date code on these white tires? I've got a batch of spares from 01/01.
~Manny.
Posted by Mathew Molloy (Member # 666) on 10-19-2002, 12:06 AM:
Glenn, did you find out what the reason was for those drive wheels turning to goo? I've got three of those cream-colored wheels I just received about 4 months ago that are all going gooey on me.
Posted by Mark Gulbrandsen (Member # 72) on 10-19-2002, 01:37 AM:
The good news is that you don't have to buy the Christie drive wheels if you don't want to. Edw. Wolk now manufactures and sells that Christie part. Cost from them is about 10 dollars less than from Christie. We have had some of them in the field for quite a while(I think approaching 1 year, possibly longer) with no trouble at all. We also just rebuilt 8 AW-3's all with these Wolk drive wheels. The quality of them is VERY high!!
Mark @ CLACO
Posted by Brad Miller (Member # 2) on 10-19-2002, 01:39 AM:
Christie over the last few weeks sent out another recall on a batch. I want to say it was wheels date stamped 10 01 and 11 01. That may not be the right dates though.
Posted by Jon Bartow (Member # 241) on 10-21-2002, 10:48 PM:
Brad, I had a bunch of 10/01 drive wheels that died (turned to goo) about a month ago.The best method that I've found for cleaning the platters:
Use some liquid gum remover (not the aerosol freeze stuff, an actual liquid) and a scotch pad. It takes a little elbow grease, but if you let it soak for a minute or so it's not that bad. Then alcohol to clean the gum remover off. (all of this without film on the platter of course)
Posted by Mark Gulbrandsen (Member # 72) on 10-21-2002, 11:19 PM:
Not sure why all the fuss about the Christie wheels. Give the Wolk wheels a try! You'll have alot better luck. They are a black rubber instead.
Mark @ CLACO
Posted by Glenn Conatser (Member # 970) on 10-22-2002, 10:37 AM:
Mark do you have any more info on those drive wheels. Maybe a part number, distributor or web site. I want to pass this info on to my tech so we can give them a shot.Are problems are still persisting but not as bad as before. We lubricated the axle's on the platters and re timed them and this has helped. But the problem still lingers.
To get the gooey mess of the platter ive been using GOO GONE and this seems to work pretty well.
Glenn
Posted by Brent Neal Jones (Member # 1048) on 10-22-2002, 11:27 AM:
Goo Gone is a great cleaner. But after what I've seen it do to disolve corrosion off of theatre seat bolts, I'd almost be scared to use it on vital rubber parts. (Such as platter tires) ------------------
Film-Guard directions:
1.) Lather
2.) Rinse
3.) Repeat
***Do Not Ingest***
Brent
Posted by Mark Gulbrandsen (Member # 72) on 10-22-2002, 08:06 PM:
Try here Or get the number off the web site and give Tony or Don a call. We have had them in the field for quite a while, and so far so good.
Mark