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This topic comprises 2 pages: 1 2
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Author
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Topic: Changing sound reproducers,rotation of projection head doesn't match with SH.
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Luciano Brigite
Master Film Handler
![](http://www.film-tech.com/ubbmembers/1104b.jpg)
Posts: 277
From: Sao Paulo, SP, Brazil
Registered: Jan 2002
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posted 05-06-2004 10:00 AM
Hello, I'm having a problem with a Westrex Standard (model on ID plate is R6) SH and the projection head (Unknown make for all foreign techs,since it's a brazilian junk )The previous setup had an old Simplex SH (from the time of Supers,I believe) and the gears inside the SH worn out and locked up,being an old stuff, it was decided to have the SH replaced since the westrex SH was available at the theatre, now the problem with it is : the shaft and pulley on the Simplex SH that used to drive the rest of the projector spins counterclockwise ,same rotation as the mechanism, now the Westrex turns clockwise,opposite to the mechanism.Is there anything that can be done in the projection mech to revert it's rotation? (like changing a gear's position or something so the input rotation goes from counterclockwise to clockwise).Or should I jump on it with a large hammer on hand,turn everything into tinny pieces and kicks some sense into the theatre's owner to get a decent projector... ( or another junk that'll run for at least 3~4 months after I give the finger in being a tech and stop burning my brain and watch my hair falls out, wich I plan to do by the end of the month. other reasons as lack of a honest,decent supplier,a machine shop that'll deliver parts on time among other things are making me go out of it :/ ) Thanks!
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Luciano Brigite
Master Film Handler
![](http://www.film-tech.com/ubbmembers/1104b.jpg)
Posts: 277
From: Sao Paulo, SP, Brazil
Registered: Jan 2002
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posted 05-07-2004 10:42 AM
Paul, Yes, the sprocket in the sound reproducer is turning in the right direction.The problem with it is: Looking at the non operating side of it,the pulleys in the sound reproducer turns clockwise (on the operating side, it'll be turning counterclockwise,wich is the right direction for it) now, the projection head's pulley on the non operating side turns counterclockwise (the opposite to the sound reproducer).both, the sound reproducer and projection head are belt driven then it means that both have to turn to the same direction ,and this is the problem since they don't. The Westrex R6 seems the same as the Century R3 standard drive version.
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Luciano Brigite
Master Film Handler
![](http://www.film-tech.com/ubbmembers/1104b.jpg)
Posts: 277
From: Sao Paulo, SP, Brazil
Registered: Jan 2002
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posted 05-08-2004 06:57 PM
I followed Mark's sugestion and it's now running as it should be, added a guide roller next to the sprocket to reroute the film and the stripper is gone from the roller's arm, it's now a piece of metal sheet cut and bolted under the sprocket.During the test run I disassembled the Simplex gearbox and.. where's the oil??? instead of it I found a bunch of gunk (looked more like a mix of grease and grade 90 oil) and lots of bronze shavings and then broken gear teeths,don't know which one broke first, if was any of the gear's teeth or the pinion's.but surely was a piece of broken teeth that put an end on it all when it got caught between the gear and pinion. I'd repair it but I no longer have a source for parts here as I mentioned before and the theatre's owner doesn't seem to want to have it repaired now that he has his "frankestein" running again and belts are cheaper than gears, not to mention, easier to change when they fail. And now that Mark mentioned about overlooked parts in a sound reproducer gearbox, I have one from one of my projectors that I'll open and take a look inside.it's in the need for other parts but until now I didn't pay attention to it's gearbox.Since I'm having all this "good luck" with sound reproducers my hair won't raise or fall out if I find anything wrong inside it Seemsat's about time for me to light some colored candles, burn some incences,open a book of black magics or start chanting the Om mani padme oooooommmmm! thing
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This topic comprises 2 pages: 1 2
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