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» Film-Tech Forum   » Operations   » Film Handlers' Forum   » FP20 Skate Height

   
Author Topic: FP20 Skate Height
Steve McAndrew
Film Handler

Posts: 84
From: Hemel Hempstead, Herts, UK
Registered: May 2015


 - posted 08-14-2017 01:15 AM      Profile for Steve McAndrew   Email Steve McAndrew   Send New Private Message       Edit/Delete Post 
Can anyone advise on how to correctly adjust the skate height on an FP20?

Thanks

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12086
From: Annapolis, MD
Registered: Dec 1999


 - posted 08-14-2017 07:11 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
Officially, there should be two film thicknesses between the skate and the intermittent sprocket.

I tend to make mine a little more snug with just 1 film thickness.

Observe the image on screen and also listen to the film running through, particularly with a splice. It shouldn't sound like it is struggling or make a loud click when the splice passes. It is okay to hear it but it shouldn't sound harsh nor look bad on screen.

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Steve McAndrew
Film Handler

Posts: 84
From: Hemel Hempstead, Herts, UK
Registered: May 2015


 - posted 08-18-2017 07:59 AM      Profile for Steve McAndrew   Email Steve McAndrew   Send New Private Message       Edit/Delete Post 
Thanks for the reply.

So basically put two pieces of film around the intermittent sprocket (as you would when threading a film) and the wind up the pin that holds the skate until the bottom of the skate is snug against the film? Or is it two film thickness between the tip of the sprocket teeth and the skate?

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12086
From: Annapolis, MD
Registered: Dec 1999


 - posted 08-18-2017 10:27 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
You run it up until quite snug on 2-film thicknesses. Again, I've often gone a little tighter. But listen to the film as it runs through and particularly when splices run through.

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Steve McAndrew
Film Handler

Posts: 84
From: Hemel Hempstead, Herts, UK
Registered: May 2015


 - posted 08-20-2017 11:33 AM      Profile for Steve McAndrew   Email Steve McAndrew   Send New Private Message       Edit/Delete Post 
I have adjusted the skate as mentioned, however the skate is rubbing against the sprocket at the front of the sprocket (3 O'clock position) is this correct?

Thanks

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12086
From: Annapolis, MD
Registered: Dec 1999


 - posted 08-20-2017 12:19 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
Yes

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Simon Wyss
Film Handler

Posts: 70
From: Basel, BS, Switzerland
Registered: Apr 2011


 - posted 08-21-2017 12:38 AM      Profile for Simon Wyss   Email Simon Wyss   Send New Private Message       Edit/Delete Post 
The tighter you adjust the skate in height the lower you can set the pressure force on the - . . . + scale. Note that there are three types of skates, white, black, and brown ones made from different plastics. They’re softer and harder. I have made best experience with fresh sprocket drums and black skates.

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