Film-Tech Forum ARCHIVE: Interlock Accumulator

This is topic Interlock Accumulator 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=007992

Posted by Iben Jimenez (Member # 3713) on 05-07-2006, 01:12 PM:

I have notice that the accumulators in my booth have a curious set up. It has three rollers in the lower part with the first one lower than the second and the second lower than the third, in other words, in steps. The upper rollers are four and in line, but the last one in the extreme right has a gap separating it from the other three. Is there any reason for this set up?

Posted by Monte L Fullmer (Member # 2797) on 05-07-2006, 01:45 PM:

That is a STRONG accumulator..you actually are creating a "w" thread with the film through the rollers. The final roller heads to the receiving projector.

Why of the many rollers is to reduce the vertical travel of the lower unit when the film is completely through the rollers, but allowing increased tension on the film between the two projectors - to keep the film taught and the failsafe on the payout projector in check.

You just have to pretend that you have a rope pulley tack system - a system with many rollers for the one rope to go through. This allowed the user to lift very heavy items with one rope since the rollers are reducing the vertical travel of the tack, but allowing less pull by the user to lift such heavy items due to the reduction of the rope speed in the rollers.

Like a manual transmission - the many gears to get the car in motion.

-Monte

Posted by Richard Fowler (Member # 893) on 05-07-2006, 02:59 PM:

The smaller black rollers on the Strong/Potts/ Design manufacturing interlock accumulator work better and less chance of film jumping the rollers in that configuration. So are you interlocking "Mission Impossible' at the Cayea 7 ?