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Fedupwithdigital
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xx Mamiya ZM battery holder
« Thread started on: May 9th, 2016, 08:31am »

Just dusted off my ZM. It's faulty - the self-timer doesn't work (when S-T is selected, it just fires as normal) - but works fine otherwise.

One annoying thing however is that the battery holder keeps falling out! Had to tape it in.

Does anyone else have this issue or is it just me!?
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bghomofaber
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xx Re: Mamiya ZM battery holder
« Reply #1 on: Feb 3rd, 2017, 4:47pm »

Just got a ZM with a missing BH.

Tomorrow I will try to make a replacement from teflon.

Maybe i will come up with an howto make a functional replacement.

I noted there are two notches in small sheet of metal covering the side of the cavity.

That's where the holder inserts its retractable teeth, I guess.

Check that mechanism.

Post an image of the holder if you can so it can be verified
« Last Edit: Feb 3rd, 2017, 4:49pm by bghomofaber » User IP Logged

leonAzul
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xx Re: Mamiya ZM battery holder
« Reply #2 on: Feb 5th, 2017, 01:45am »

on Feb 3rd, 2017, 4:47pm, bghomofaber wrote:
Just got a ZM with a missing BH.

Tomorrow I will try to make a replacement from teflon.

Maybe i will come up with an howto make a functional replacement.

I noted there are two notches in small sheet of metal covering the side of the cavity.

That's where the holder inserts its retractable teeth, I guess.

Check that mechanism.

Post an image of the holder if you can so it can be verified


It might be a few days before I can verify and upload an image.

As I recall, this is not a straightforward part to fabricate, but rather requires several pieces of stamped metal (for electrical contacts) embedded in the nylon carrier. The click to lock is just the flexing action of one of those plates. There is an alignment ridge, but no 'retractable teeth'. Tolerances are rather tight.
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bghomofaber
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xx Re: Mamiya ZM battery holder
« Reply #3 on: Feb 5th, 2017, 11:58am »

on Feb 5th, 2017, 01:45am, leonAzul wrote:
It might be a few days before I can verify and upload an image.

As I recall, this is not a straightforward part to fabricate, but rather requires several pieces of stamped metal (for electrical contacts) embedded in the nylon carrier. The click to lock is just the flexing action of one of those plates. There is an alignment ridge, but no 'retractable teeth'. Tolerances are rather tight.


Well I think I can use sometricks from knifemaking. A teflon bar with a couple holes, on the back a bent sheet of conducive material, creating contact between the negative of the batteries while pushing the positive side against the positive contact.

Kind of creating it by slow filing a knife mechanism, but improvised. The teflon bar should stay inside by pressure or by a simple adhesive tape.

Something improvised to keep camera going until I find an original spare, nothing for serious work but just to use it in walkabouts

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bghomofaber
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xx Re: Mamiya ZM battery holder
« Reply #4 on: Feb 5th, 2017, 12:03pm »

There are just a couple Zm for sale now on the whole ebay, and at steep prices. If it is as rare as my contax 159, for which I have been looking for a broken twin to cannibalize, so far without success, my guess is that I shall have to create one.

Got some good experience at filing and I have the right tools so I'm not afraid to experiment.

Will try to contact mamyia repair facility in my country but usually such firms keep only spares for cameras being produced.

The repairmen from the USA linked top of this forum seem to have no internet presence now



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leonAzul
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xx Re: Mamiya ZM battery holder
« Reply #5 on: Feb 5th, 2017, 3:16pm »

on Feb 5th, 2017, 12:03pm, bghomofaber wrote:
There are just a couple Zm for sale now on the whole ebay, and at steep prices. If it is as rare as my contax 159, for which I have been looking for a broken twin to cannibalize, so far without success, my guess is that I shall have to create one.

Got some good experience at filing and I have the right tools so I'm not afraid to experiment.

Will try to contact mamyia repair facility in my country but usually such firms keep only spares for cameras being produced.

The repairmen from the USA linked top of this forum seem to have no internet presence now



Two of them are available for "under $20.00", items <162380210160 > and < 381874964068> the first one with a lens looks like a better deal all around to me.

ZMs show up periodically, often in mobs of 4 or 5 at a time. If you can be patient, it shouldn't take more than a year or so to get a good one or suitable donor with a few choice lenses.

To the best of my knowledge the last remaining service that had a significant stock of replacement parts liquidated them several years ago. With these cameras, we are now on our own regarding fabricating replacement parts.

Mamiya support in any country is pretty much non-existent since they sold off their optical and camera divisions. Some of the later models of the 645 AFd are still supported by PhaseOne.
« Last Edit: Feb 6th, 2017, 12:00am by leonAzul » User IP Logged

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