Film-Tech Forum ARCHIVE: Making up from 6000' Reels

This is topic Making up from 6000' Reels 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=002356

Posted by Armin Pohl (Member # 789) on 06-07-2001, 07:40 AM:

I noticed that when I make up a movie onto a platter using a makeup table and 6000's reels that after I'm done making up the whole movie and I take the centre ring out to thread through the 'brain', the film collapses in and has a rather large indentation. Is this because I ran the makeup table too fast at the beginning and the film was wound too tight ??

Posted by John Pytlak (Member # 331) on 06-07-2001, 08:15 AM:

Armin Pohl said: "I take the centre ring out to thread through the 'brain', the film collapses in and has a rather large indentation. Is this because I ran the makeup table too fast at the beginning and the film was wound too tight ??"

I agree that the problem may be incorrect tension as you wind the film onto the ring. Although winding speed may affect this, the holdback tension from the make-up table has the most effect. Depending upon the holdback system of the makeup table, tensions can vary considerably from the outer laps to the hub when winding from a 6000 foot reel. The other factor that affects winding quality is the relative humidity. Very dry conditions may cause excessive film curl, which can lead to "spoking" or non-circular windup.

Here is what SMPTE Recommended Practice RP 106 says about film tension:
____________________________________________
2 Film tension
Film tension under normal operating conditions shall
be 1.7 N to 4.4 N (6 ozf to 16 ozf).
3 Measurement methods
3.1 A feed or take-up system shall be measured
with the equipment in normal operating mode
after placing 0.9 m to 1.8 m (3 ft to 6 ft) of film
around the hub of the reel and attaching the
other end to a dynamometer. Tension shall be
plotted against winding diameter and shall be as
specified in clause 2.
____________________________________________

------------------
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

Posted by Brad Miller (Member # 2) on 06-07-2001, 01:29 PM:

Armin,

Are you holding the reel on the make up table when it loads? MUTs were not designed for that.

Posted by Armin Pohl (Member # 789) on 06-11-2001, 08:45 AM:

Hi Brad,

I loaded up Bridget Jones's Diary at a slower speed than my usual and it worked like a charm. I took out the centre ring at.. voila - the film stayed in place.

I set the 6000' reel on the makeup arm of the table and I just let it do it's stuff. I can walk away and do other things while it loads. I'm not sure of the manufacturer.

Posted by Sean McKinnon (Member # 612) on 06-11-2001, 03:29 PM:

What kind of platter system?