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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Threading Tips 101 (Page 1)

 
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Author Topic: Threading Tips 101
Kyle Connolly
Film Handler

Posts: 13
From: Ottawa, Ontario, Canada
Registered: Apr 2001


 - posted 05-22-2001 01:56 PM      Profile for Kyle Connolly   Email Kyle Connolly   Send New Private Message       Edit/Delete Post 
I like the threading tip in the tips section, however there is one thing in it that I think may be wrong. It demonstrates threading backwards to stop the leader from ever touching the floor to keep it clean. However, it says to thread through the failsafe / cue detector before threading the rest of the projector. That, I find, is dangerous.

About a month ago at my theatre, the failsafe in projector 5 was dirty I guess, and I didn't realise it, but the little green light that tells you film is in the failsafe was on without the film. A projectionist was threading the projector, and it just started! His hands were in it! The 10 beeps from the automation BEFORE starting aren't really audible in the noisy booth.

Anyway, this sort of thing could happen all the time if you thread the failsafe first. I guess it would not be much of a problem if you had to manually start the projector, but our automation starts it automatically at the film start time.

I just wanted to see what everyone's take on this is.

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-@-

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Brad Miller
Administrator

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


 - posted 05-22-2001 02:05 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Any automation that starts film from a timer or computer should have a "safe" mode for threading. If your automation does not, then common sense would dictate to thread through the entire projector without the failsafe, then thread the failsafe and then start turning the motor over by hand. If you thread the projector without the failsafe and start turning the projector over by hand to check the loops and framing, your leader will be dumped on the floor.

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Tom Evans
Film Handler

Posts: 13
From: UK, Birmingham.
Registered: Apr 2001


 - posted 05-23-2001 08:05 PM      Profile for Tom Evans   Email Tom Evans   Send New Private Message       Edit/Delete Post 
I agree, the tension should be taken up on the platter first without the film touching the floor. We all know it's only the leader, but just observe how dirty the first trailer or advert gets from the dirt on the leader migrating into the film. You should get the tension before actually threading the film into the projector..and always hold the film until the take-up platter stops, this will prevent the film from snagging if the return arm goes to far over and crushes against the cluster/selector rollers. Likewise u can always let go of the film if this is going to happen. And if u do take up the film like this always check that the film is sitting properly on the returning rollers .

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James R. Hammonds, Jr
Jedi Master Film Handler

Posts: 931
From: Houston, TX, USA
Registered: Nov 2000


 - posted 05-23-2001 09:03 PM      Profile for James R. Hammonds, Jr   Email James R. Hammonds, Jr   Send New Private Message       Edit/Delete Post 
One thing I havent seen mentioned (unless i havent looked hard enough) is alternatives to threading upward and keeping the leader off the floor at the same time.

I just couldn't get the hang of "threading up" so what I started doing is to "thread up" to the lowest sprocket wheel to anchor the film, take up the slack, and "thread down" the rest of the projector.
The trick is pulling the right amount of slack to thread the rest of the machine.

Also, I think you should shut off those timers and start the movies yourself.
You should always be there to make sure the picture goes on screen properly

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Joe Redifer
You need a beating today

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


 - posted 05-23-2001 10:37 PM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
That is the way I usually thread, but when you do it that way, you need to go back and readjust the film around the bottom sprocket. It takes a little longer, but it is better than getting the leader on the floor. Either way you get exactly the same benefit.

But when you train a new projectionist, you should train them to thread UP from the beginning.

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Brad Miller
Administrator

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


 - posted 05-24-2001 06:59 AM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Another way to keep the film off of the floor if using the holdback sprocket is too much for someone to deal with is to get a clothespin. Keep it clipped to the projector and when you are ready to thread, clamp the leader down to the projector, thread as normal, then release the clothespin as you thread through the failsafe and start platter tension.

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Josh Jones
Redhat

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


 - posted 05-24-2001 05:19 PM      Profile for Josh Jones   Author's Homepage   Email Josh Jones   Send New Private Message       Edit/Delete Post 
Or if you really hate threading backwards, you could place a white pillowcase in a clean garbage can and dump the head leader into it while threading. it takes a bit longer, but the leader still does not touch the floor

Josh

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-24-2001 08:09 PM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
By all means, KEEP THE LEADER OFF THE DIRTY FLOOR when threading/lacing the projector. "Bottom-to-top" threading works well for many, pulling the leader from the platter to the top guide roller of the projector, past the soundheads and projector, and right back to the platter takeup without touching the floor, then finally threading the projector and soundhead(s) bottom to top.

Josh's pillowcase idea is like a film editor's "trim bin" --- it keeps the film from contacting a hard surface that may scratch it. But launder the pillowcase frequently to keep it from accumulating lint and other debris that will get on the film.

Any dirt picked up by the leaders will contaminate the platter and projector, and work its way into the print, leaving lots of UGLY black dirt specks on projected image.

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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion


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Jason Black
Phenomenal Film Handler

Posts: 1723
From: Myrtle Beach, SC, USA
Registered: Nov 2000


 - posted 05-25-2001 12:58 AM      Profile for Jason Black   Author's Homepage   Email Jason Black   Send New Private Message       Edit/Delete Post 
I dont' see the point of threading UP.. I have threaded DOWN for 13 years now... My leader never touches the floor. Using Strong platters, I go from payout- bypass the projector- to the take up (T/U platter switch is off, btw) then go back and thread the projector. After checking all loop sizes/framing window/etc, I go back to turn the take up platter on to pull final tension on the 'dancer arm'. All the while, I have my hand slightly on the platter in the event the dancer hangs and the platter doesn't stop. I can either stop it by hand until the switch can be cut off, or I can disengage the motor. I can't remember that ever happening, but if it did, I'd be ready...

YMMV,

------------------
The early bird may get the worm, but the second mouse gets the cheese!

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Demetris Thoupis
Phenomenal Film Handler

Posts: 1240
From: Aradippou, Larnaca, Cyprus
Registered: Apr 2001


 - posted 05-25-2001 05:04 AM      Profile for Demetris Thoupis   Email Demetris Thoupis   Send New Private Message       Edit/Delete Post 
HAHAHA
This is the part where the CHANGEOVER projectionist has the benefit. He can thread either upwards or downwards (most prefer the downwards procedure). Anyway. Threading upwards is kind of difficult (practice always makes it better). But. I don't see any reason why anyone suggests threading UP. It is mere fact that threading DOWN is much easier. Any reasonable projectionist can take good care of the film not touching the dirty floor and COME ON GUYS. How many of you actually CLEAN your rollers every single day and how many of you wipe your platters every single show. Let's be real. Instead of catching the dirt from the ground you get to catch it via your projection equipment. Unfortunately people don't pay much attention and neglet cleaning their projectors every now and then. That destroys the print and we are left with an extremely scratcfull (what a WORD!!) film. Anyway. Changeover is the best You take the film from the up spool and your thread it to the down spool. No need to touch the floor or anything. See ya
Demetris Thoupis

"FOR STRENGTH AND HONOUR"

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Joe Redifer
You need a beating today

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


 - posted 05-25-2001 06:51 AM      Profile for Joe Redifer   Author's Homepage   Email Joe Redifer   Send New Private Message       Edit/Delete Post 
Threading down is only easier if that is the way you learned to do it.

You don't need to clean the rollers often if they never really get dirty in the first place.

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Brad Miller
Administrator

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


 - posted 05-25-2001 08:34 AM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
Jason,
Does any part of the leader hit the floor when you are threading the actual projector head? To keep it from hitting the floor, you must be securing the film in some manner. That's really all that is important.

Demetris,
Yes, threading UP is much, much quicker than threading down if you learned that way or have the ability and/or desire to change your ways. (I say "ability" because some people just never can seem to get the hang of it, no matter how hard they try once they have learned how to thread top to bottom. Of course those are also the same people who care enough to make damn well sure that the leader never comes into contact with the floor, so it is never an issue. ) The trick is turning the intermittent to a certain point in it's travel (not just the dead spot), then actually framing on the holdback sprocket, and working your way up from there. When you have reached the top, all of your loops are perfectly set. 10 seconds is plenty to thread a typical 35mm projector when done in this fashion...and that is not sacrificing "in frame" threading or exacting loop sizes either. Just a couple of days ago Ethan was visiting me in a booth and decided to secretly time me. He said I had threaded the entire platter and projector in under 30 seconds counting from the point I finished rewinding the media cleaner up until the timer was set. I didn't even know he was timing me, but I originally learned to thread down and after forcing myself for a week to thread "up" (to get past the aggravation of the awkwardness) I can now thread much faster than I ever could when threading from top to bottom. The people I train have usually never touched a piece of film before and they just don't know any different. To fully understand, you will just have to force yourself to do it for a few weeks until you get good at it. Then you will understand why it is a more efficient way to thread. Rarelly do I ever have to reopen a pad roller to resize a loop, for they are perfect the first time (which also saves wear on the arms).


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Bill Langfield
Master Film Handler

Posts: 280
From: Prospect, NSW, Australia
Registered: Apr 2001


 - posted 05-25-2001 11:09 AM      Profile for Bill Langfield   Author's Homepage   Email Bill Langfield   Send New Private Message       Edit/Delete Post 
I agree with Jason.

Every location I work at loops the leader
through projector rollers (top/bottom).

Then lace top to bottom.

Sometimes the film (leader)MAY touch
the floor, but floor should be clean.

There seems ongoing thought that bio floors
are DIRTY, I fail to understand that.
They should be mopped/vacuumed every night.

At the very least get one of those $2 static
mops and pass it over the the whole projection room, paying attentiomn to where the film might come close to the ground.

Film is a dust/lint magnet.
Remove the dust before the film finds it.

Bill.


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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000


 - posted 05-25-2001 12:51 PM      Profile for John Pytlak   Author's Homepage   Email John Pytlak   Send New Private Message       Edit/Delete Post 
Bill Langfield said: "Film is a dust/lint magnet."

That was true before the introduction of Kodak's VISION Color Print film, which has a transparent conductive backing layer that greatly reduce the static charge that can attract and hold dirt to film. If you have an old triacetate or polyester print made before about 1998, compare it to a new print on Kodak VISION Color Print film. Quickly pull a piece of the film through your fingers to try to put a static charge on the film, and then hold it near cigarette ashes or dust. The old film will attract the dirt, much like the old static demo of putting a plastic comb through your hair and attracting things to it. The Kodak VISION color print film will not hold a static charge, and stays much cleaner.

Regardless, I do agree it is always good practice to keep any film away from dirty surfaces. Many threading leaders are "dust magnets" since they are NOT made on the new Kodak VISION stock.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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George Roher
Master Film Handler

Posts: 266
From: Washington DC
Registered: Jul 99


 - posted 05-25-2001 11:56 PM      Profile for George Roher   Email George Roher   Send New Private Message       Edit/Delete Post 
I learned to thread top down originally but switched to bottom-top threading. It was difficult and awkward at first, but after a while it got really easy. I can't thread in 10 seconds like Brad, but I can thread "up" as fast as I can thread "down". I only thread down now if I'm running reel to reel.

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