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Author Topic: Mystery Chatter Westrex 2003 Craig Hanham Film Handler Posts: 79 From: Wellington, New Zealand Registered: Oct 2001 posted 09-15-2002 06:24 AM                     One of my projectors has developed a random chatter of the 'there it is/isnt type'. After advice from and a visit by local service tech its still there. Have changed intermittant (complete unit), removed shutter shaft and replaced a suspect bearing. When the chatter occurs there is no change in the image (as steady as). There appears to be a slight sound distortion mid-high freq. but whether caused by problem or as effect of transferred vibration is unclear. I am running reverse scanners with red LED. Punters haven't noticed and I have to listen to hear it. Anyway with the songs in bollywood pictures it could be anything. As I may have a little time before next screening I will check every nut and bolt for something out of place. Looking forward to the collected wisdom here-abouts. Will keep posted with updates.  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 09-15-2002 06:35 AM                     Westars and random noises! If I had a pound for every........ Often as not it's wear in the vertical shaft that makes the Westrex mech noisy, the top and bottom bearings go and also the sliding gear and it's keyway are standard culprits. To check the keyway without stripping the mech down, grab firmly the sliding gear, and with your other hand try to rock the mech back and forward, you'll be able to see if there's any movement between the gear and the shaft. If there is then you're looking at a gear and shaft, as the keyway in the shaft itself will probably be worn. I don't know how prices are over there, but here it's false economy to replace bits, so we normally fit an exchange vertical shaft assembly. One other thing worth trying. When it's chattering, try turning the shutter phasing knob a couple of turns. If the noise changes that would be indicative of worn teeth on the sliding gear. By turning the phase knob you are bringing areas of the teeth into use that probably have never done any work. Often you can quieten a chattery Westar by turning the phase knob, then re-timiing the shutter to get rid of the ghost you've just created.  |  IP: Logged

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