| Author |
Message |
    
Johnneal
Tinkerer
Username: Johnneal
Post Number: 1
Registered: 11-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, November 04, 2007 - 11:51 am: | 
|
Can anyone help me get the B (Z) setting on my Leica III sorted out? It works about 1 in 4 times, otherwise I get 1/20 sec.
I have got the slow speeds adjusted OK, and now the B setting has gone walkabout  |
Dgillette4
Tinkerer
Username: Dgillette4
Post Number: 107
Registered: 04-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, November 04, 2007 - 04:45 pm: |
|
Hi John: You have a shutter with a pin-hole timer, You probably cleaned all moving parts by now,while it's apart check that the pin attached to the dial-shaft is not bent. The B setting is supposed to hold the closing curtain from running until you let go of the shutter release. Z (German for time) holds the closing up until you turn the dial off Z. Also did you check the linkage and cams from slow speed scale . Let me know how you make out with it. The Leica 111 is a great well engineered camera ahead of it's time and once fixed it will outlast me. Good luck..Don |
Johnneal
Tinkerer
Username: Johnneal
Post Number: 2
Registered: 11-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 05, 2007 - 06:54 am: |
|
Hi Don,
Thanks for your input - I fear my description may have been a little confused, and I should not have mentioned Z, so here goes again.
On the slow speed dial I have 1/20 to T (time) and these all work fine, following a clean and lube. The T setting hold the shutter until I move the dial to 1 sec, or wind on the shutter.
However, the B setting has now decided not to work at all - all I get is (approx) 1/20 sec. the pins all look OK and all the other speeds work just fine. I had a B setting until I sorted out the slow speeds, now I don't.
I have seen this problem before on a IIIc and a IIIF, but they have a different release train, in which the B setting can be affected by the condition of the leaf springs on the botton of the camera. I'm struggling to rationalise the release sequence for the III (the first one I have worked on) as it is significantly different to those. It's also different to the I and II bodies I have.
I guess it is time for the top cover to come off again... |
Johnneal
Tinkerer
Username: Johnneal
Post Number: 3
Registered: 11-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 05, 2007 - 12:38 pm: |
|
Looks like I was right - there is a spring on the pawl that catches the 2nd curtain latch under the speed dial, the strength of this has to be balanced against the upward pressure from the flat leaf spring at the bottom of the body.
Get this right and, hey presto, working B setting again! |
Dgillette4
Tinkerer
Username: Dgillette4
Post Number: 110
Registered: 04-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 05, 2007 - 03:05 pm: |
|
sounds like you have this one mastered, congrats...Don |
Spdtwn
Tinkerer
Username: Spdtwn
Post Number: 21
Registered: 09-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 06, 2007 - 07:11 pm: |
|
FYI. Leica have a release/no release gauge which slips under the release button so that when setting B and getting both curtains to rundown closed when rewinding..if shutter is in cocked state. Release=0.011" No=0.016". Feeler gauges would do the trick. |
