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Mark_workman
Tinkerer
Username: Mark_workman
Post Number: 3
Registered: 04-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 08, 2009 - 10:28 am: | 
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This is the first shutter job for me and it's simple, but I need some education. The blades are cleaned and will open easily manually and will flip back closed fine with the return spring tension. After playing with it and seeing what things do for a while, I find that there just no spring tension that opens the shutter when it is triggered - it just sits there like nothing happened while everything else moves. Am I missing a part here? I've reassembled with all the springs and followers in the ss cams, etc. but still nothing. I can't find an image of a PaX shutter (and don't have enough experience yet) so can't tell if some part is missing. Thanks for any help.
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Harryrag
Tinkerer
Username: Harryrag
Post Number: 61
Registered: 05-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, April 09, 2009 - 04:36 am: |
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The only PaX pictures I know of are here http://homepage1.nifty.com/fukucame/tips/pax35_t.htm (maybe of little or no help, even after auto translating the Japanese text into English). You could try and find info on YAMATO OPTICAL, the long gone maker of the PaXes. |
Rick_oleson
Tinkerer
Username: Rick_oleson
Post Number: 855
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, April 09, 2009 - 05:33 pm: |
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wow... that is a TOTALLY different shutter from the one in my PaX M2, the only thing they look to have in common is that they're both round.
If everything is moving very easily, I would look for a missing, broken or misconnected spring. Work through the sequence of operation and see which lever would make it fire, if only it had something pushing it in the right direction. Shutters are a balance of a number of springs working against each other, so one being too strong or too weak can stop it. There is the spring that recloses the blades, which has to be able to overcome the friction in the system ... then the one that returns the speed delay gears to their ready position, which has to be able to overcome the friction and intertia in the gears; and then the one that opens the blades, which has to be strong enough to overpower both of the above at the same time and still move the blades quickly. |
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