8mm Forum: Film end trimming

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Posted by Tim Christian (Member # 48) on December 05, 2003, 03:29 PM:

I'm trying to find out which shapes of film end suit which auto-load projectors best. Within the limtations of text format, the most common forms of end shapes are shown below. Some suit some projectors better than others. For example, on the 'straight cut' gives a reliable load with my Eumig Mark S. It will not accept the 'tongue' shape reliably.

Could you please let me know (direct email)

1. Which shape is best for which projector

2. Which projector desn't like a paricular shape

___
|o |
|o | straight cut

__
/ \
|o | tongue

_--_
|o | radius (shallow curve)

_
|o\
|o \
|o \
|o | taper (usually over 2 inches or so)

I'll publish the results.

Thanks.

Posted by Tony Milman (Member # 7) on December 06, 2003, 03:30 AM:

Hi Tim,

My Elmo's seem to be fairly forgiving but they get real excited when I offer them a radius made with the built in splicer.

My Sankyo is also content with a radius.

Tony

Posted by Kevin Faulkner (Member # 6) on December 06, 2003, 06:28 PM:

Elmo's prefer the Radius type trim using the built in trimmer. Offer them a trimmed end which does not put that first sprocket hole in the right place and you will be sitting there for eternity waiting for the first sprocket wheel to grab the film.

Kev.

Posted by Barry Johnson (Member # 84) on December 11, 2003, 02:27 PM:

A slight diagonal cut seems to work wellon my S8 machines,as it does for 16mm too.

Posted by Steve Klare (Member # 12) on December 11, 2003, 03:58 PM:

Hmmmm.....

Pretty soon I'm getting a second sound projector. When that happens I'll have a Bolex SP-80 Special (Really a Eumig 810 in Bolex Clothing) and an Elmo ST-800 (the new addition).

Is there any end trim that will work on both machines?, or every time I switch machines will I have to nibble a little more off my films?

Posted by Tim Christian (Member # 48) on December 11, 2003, 04:14 PM:

Steve, that's the reason I always put 30" (75 cm in Euros) of leader on my films. It is enough to get through to the take-up spool on all the projectors I've tried and allows for retrimming. When it loses 4" or so, I add a bit more on. If you use tape or overlap cement splices it also pulls the odd hair out of the gate!

Add 12" of leader to the end as well in case creases from reels break bits off.

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