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Topic: Christie horizontal weave
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Randy Stankey
Film God
![](/ubbmembers/64b.jpg)
Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99
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posted 04-27-2012 09:02 PM
If the intermittent sprocket isn't perfectly aligned with the film trap it can cause weave.
The film isn't being pulled straight down through the trap, causing it to "pinball" off the guides and/or the guide wheels.
Check to see that the trap is inserted and fastened properly and that the sprocket is correctly aligned.
An improperly aligned intermittent pad shoe can also cause horizontal weave and/or vertical jitter. (Jitter being the most likely.)
Sometimes, you need an alignment tool to make the adjustment. Other times you can use a steel straight edge. If neither of those are available, you can take a piece of film, trap it in the gate and use that to align the sprocket.
Using film to align the sprocket should be considered the least accurate. A straight edge is second best. If you can get an alignment tool for your projector, that would be the best.
If I remember correctly, Christie does (or did) make one for their projectors. This device, if it can be had, would most likely be the property of your theater's technician.
It's probably best to call your tech, anyway.
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