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Author Topic: Simplex XL screen jitter David E. Nedrow Master Film Handler Posts: 368 From: Columbus, OH, USA Registered: Oct 2008 posted 03-13-2011 09:04 PM                        I thought I'd start a new thread up, since I've resolved the ghosting issues, yet the jitter remains. There is a slight, but noticeable, up and down jitter on the screen. This is not ghosting. It's really distracting on scrolling end credits, where the credits will jump up, and then back, below where they should have ended up had everything been going smoothly. As I was fixing an earlier ghosting problem, I noticed that the shutter shaft moves back and forth, perhaps 1/8 of an inch, in a rhythmic pattern. It can be seen on the front end of the shaft (non-operator side) and on the back end, via the the shutter itself. Comparing to our #2 machine, I can see that #2 's shutter shaft is steady, with no lateral movement. Thoughts on what might be allowing the movement? Should I loosen the shutter, then carefully push it further on the shaft, while holding in the front of the shaft on the the non-operator side? David  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 03-14-2011 09:25 AM                        Movement of the shutter shaft could be one of two things: 1. Simply the shutter assembly needing rebuilding/adjustment internally. 2. Anything that causes a binding or a hesitation to any part of the gear chain. For example: Really stiff gate tension will inhibit the normal operation of the intermittent when it pulls down. Could be anything else,too. Common problem with XL's. Louis  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 03-21-2011 07:13 PM                     David, if the shutter shaft is moving back and forth the drive assembly needs to be rebuilt. Or the shutter blade is out of balance.  |  IP: Logged

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