8mm Forum: Calling Mr. Elmo for new type of Jitter

This is topic Calling Mr. Elmo for new type of Jitter in forum 8mm Forum at 8mm Forum.

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Posted by Dino Everette (Member # 1378) on September 20, 2009, 12:18 AM:

OK this one has me puzzled...I just got 2 shorts from Buckingham and went to play them and they both did this weird side to side jitter in my ST-1200HD. I have not seen this happen before and before I try out any of my films that I know run fine I want to see if this is something that might call for a fix. I did a quick run through on the rewinds and didn't see anything with the shorts that looked out of the ordinary. any ideas?

Posted by John Hermes (Member # 1367) on September 20, 2009, 12:49 AM:

Try lubing the prints. I transfer films and have this problem on rare occasions. A slight coat of Filmguard always makes them run well.

Posted by Mike Tynus (Member # 1108) on September 20, 2009, 02:12 AM:

My ST-1200HD does that on films without a balance stripe on them. It's finicky that way.

Posted by Maurizio Di Cintio (Member # 144) on September 20, 2009, 04:05 AM:

Something of this sort happened on one of my GS 1200: I had just finished splicing and cleaning the film with a sort of much refined gasoline (it just removes greasy pencil marks and dust, specs ect - does not lube): when I projected it, it showed a very little sign of horizontal jitter, so little it didn't even seem jitter, but a slight lack of focus. I haven't lubed it yet because I have to stripe it, but I hope that after that it well go through perfectly, like it did before cleaning.

Posted by Kevin Faulkner (Member # 6) on September 20, 2009, 05:43 AM:

Side to side jitter can be caused by dry or green film. Normally a lube of the film with something such as FilmGuard will sort the problem once and for all.

Give that a try first. If the ST is ok with other films I would blame the film and not the machine. The reason this can happen as well is if the film slitting is slightly under or over width. The claw can then rub on the edge of the sprocket hole as it enters. Using lube on the film lets the claw glide smoothly in and out of the sprocket hole.

Kev.

Posted by Dino Everette (Member # 1378) on September 21, 2009, 01:35 AM:

OK [Razz]

green film + green user = embarassed dino

I film guarded the prints and had a gorgeous viewing of the 2 new shorts. Its funny that over the years I have never seen this before, but had green prints which usually seemed sticky/staticky coming off the reel which would alert me to lube em first.

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