Film-Tech Forum ARCHIVE: Kinoton FP20 picture bounce

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Topic: Kinoton FP20 picture bounce

Michael Harlow
Expert Film Handler

Posts: 170
From: Faversham, Kent, UK
Registered: Jul 2002

posted 08-13-2002 03:52 PM

Hi, Can any one help.

I got an FP20 with a bouncing picture ! we've replaced the skates, the runners etc etc, different films.... But still a bounce, any ideas ?

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John Pytlak
Film God

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

posted 08-13-2002 03:53 PM

Gate tension?

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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
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Ben Wales
Jedi Master Film Handler

Posts: 602
From: Southampton. England
Registered: Jul 99

posted 08-13-2002 04:21 PM

worn intermittent sprocket or unit, any play?
Racking bush could also effect picture if worn.

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Mitchell Dvoskin
Phenomenal Film Handler

Posts: 1869
From: West Milford, NJ, USA
Registered: Jan 2001

posted 08-13-2002 04:26 PM

If none of above, then the only other options are:

Loose lens mount.
Bad intermittent.

/Mitchell

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Pete Naples
Phenomenal Film Handler

Posts: 1565
From: Dunfermline, Scotland
Registered: Feb 2001

posted 08-13-2002 05:53 PM

I've had a motor go bad on one that set the whole machine vibrating, bad enough to show on screen.

Most likely is worn cross-box, the framing bush tends to cause a 'nod' rather than a jump and is usually acompanied by the framing not staying put throught a feature. You can sometimes adjust the framing bush if it's not too badly worn.

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Gordon McLeod
Film God

Posts: 9532
From: Toronto Ontario Canada
Registered: Jun 99

posted 08-13-2002 08:14 PM

check and see if the jump is consistant across the whole range of the framers position

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Don Sneed
Master Film Handler

Posts: 451
From: Texas City, TX, USA
Registered: Aug 2001

posted 08-13-2002 10:53 PM

I have turned the screw on the end of theintermittent sprocket assy. only a little & the jump stop....If you turn it to much you bind the coupler...

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Pete Naples
Phenomenal Film Handler

Posts: 1565
From: Dunfermline, Scotland
Registered: Feb 2001

posted 08-14-2002 02:39 AM

Good point Gordon!

More often that not if the bush is worn, you can steady the picture up with the framing at one end of it's travel, usually all the way down.

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Stephen Jones
Master Film Handler

Posts: 314
From: Geelong Victoria Australia
Registered: Jun 99

posted 08-14-2002 03:00 AM

I had the same problem with a FP30 some time ago and it turned out to be a worn racking bush replaced and all was fine,when they start to wear it usely means that you have to replace it, no point in trying to adjust a worn racking bush just a wast of time. This is based on my experience with these.
Steve

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Michael Schaffer
"Where is the
Boardwalk Hotel?"

Posts: 4143
From: Boston, MA
Registered: Apr 2002

posted 08-14-2002 03:36 AM

What is a racking bush? I mean, I probably know what it is, but I am unfamiliar with the English term.
Michael

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 08-14-2002 08:58 AM

I believe they are referring to the "coupling bushing"... which to you would be a "Buchse fur Bildverstellung"

In laymens terms...the funky splined thingy that couples the intermittent mechanism to the intermittent sprocket shaft assy.

Steve

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"Old projectionists never die, they just changeover!"

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