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 Post subject: EWC Phonograph carriage restoration
PostPosted: Sat May 05, 2018 9:59 am 
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Victor I
Joined: Wed Jul 30, 2014 9:34 am
Posts: 159
Location: Spain
Hi all,

I've been asked to restore the carriage of this beautiful EWC phonograph.
Attachment:
20180504_200104.jpg
20180504_200104.jpg [ 1.08 MiB | Viewed 1865 times ]

The carriage is made out of pot metal and has swollen, cracked and falling in pieces making this machine otherwise in pristine state unusable.
Attachment:
20180406_094554.jpg
20180406_094554.jpg [ 2.5 MiB | Viewed 1865 times ]

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20180406_094609.jpg [ 2.69 MiB | Viewed 1865 times ]

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20180406_094705.jpg [ 2.46 MiB | Viewed 1865 times ]

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20180406_095221.jpg
20180406_095221.jpg [ 1.54 MiB | Viewed 1865 times ]

It's also missing the swivelling connector for the reproducer and the sliding tube is an heroic restoration attempt done with several pieces of a telescopic antenna.
Attachment:
20180406_094731.jpg
20180406_094731.jpg [ 2.69 MiB | Viewed 1865 times ]

I dismantled it to see what could be saved and start taking some measurements.
Attachment:
20180420_205510.jpg
20180420_205510.jpg [ 1.69 MiB | Viewed 1865 times ]

Then I took all the necessary dimensions from the phonograph and drawed the necessary pieces that I need to fabricate. I will use the Bengali reproducer I restored some weeks ago.
As you can see, The red piece is the pattern of the reproducer, the pink one is the swivelling arm with the tongue for raising the reproducer and the green outlined one is the carriage.
Attachment:
20180504_193925.jpg
20180504_193925.jpg [ 1.56 MiB | Viewed 1865 times ]


It's going to be a very nice project!

I have materials to do more that one so if anybody else needs one please pm me as it will be always cheaper to do a small run than doing a one off.

Best regards,

Pedro Martínez


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Mon May 07, 2018 8:04 am 
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Victor O
Joined: Tue Nov 13, 2012 6:57 pm
Posts: 90
Hello Pedro , PM sent!


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Wed May 16, 2018 9:52 am 
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Victor I
Joined: Wed Jul 30, 2014 9:34 am
Posts: 159
Location: Spain
Finally some progress on the carriage!

So after taking all the measurements and figuring out the procedure to build the carriage, I transferred the measurements to a piece of brass.
Attachment:
20180423_084935.jpg
20180423_084935.jpg [ 1.69 MiB | Viewed 1631 times ]

Then I started the long process of chain drilling it to make a very rough piece. I could have asked to make it with a CNC mill but it was expensive and It somewhat makes no sense to me to use CNC repairing a +100 years old machine.
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Attachment:
20180515_124754.jpg
20180515_124754.jpg [ 3.15 MiB | Viewed 1631 times ]

Then a 12mm hole was drilled and reamed to hold the sliding tube.
Attachment:
20180515_130325.jpg
20180515_130325.jpg [ 2.23 MiB | Viewed 1631 times ]

Some files and much elbow grease turned the perimeter smooth and nice.
Attachment:
20180516_153026.jpg
20180516_153026.jpg [ 2.16 MiB | Viewed 1631 times ]

It's still thicker that needed but I will take care of that.
A first test to check all the dimensions turned out very well.
Attachment:
20180515_135213.jpg
20180515_135213.jpg [ 1.98 MiB | Viewed 1631 times ]

That's all for today. Next steps is to thin the main body and fabricate the lower "ear" that holds the roller and the upper tube for the reproducer and horn.

Stay tuned!

Regards,

Pedro Martínez


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Wed May 16, 2018 11:05 am 
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Victor II
Joined: Fri Jan 06, 2012 6:22 am
Posts: 319
Looking good !


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Wed May 16, 2018 7:44 pm 
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Victor O
Joined: Sun Jul 30, 2017 5:28 pm
Posts: 85
Location: Deltona FL / Brampton ON
Pedro, PM sent need one also.

Herman


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Mon May 28, 2018 12:38 pm 
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Victor I
Joined: Wed Jul 30, 2014 9:34 am
Posts: 159
Location: Spain
Finally some more progress!

This weekend I focused on the tube of the carriage. I didn't found a brass tube of the correct diameter and thickness so I opted to turn it from a solid bar.
Attachment:
20180528_120530.jpg
20180528_120530.jpg [ 1.95 MiB | Viewed 1300 times ]

It was roughly turned to the desired outer diameter and then bored. The inside is quite tricky because it has a tappered portion a small paralel section in the middle and the a much wider section on the side that the swivelling tube for the reproducer goes.
Attachment:
20180528_151457.jpg
20180528_151457.jpg [ 1.92 MiB | Viewed 1300 times ]

Then the outside was finished
Attachment:
20180528_160135.jpg
20180528_160135.jpg [ 1.65 MiB | Viewed 1300 times ]

And it is starting to look like the real thing!
Attachment:
20180528_160357.jpg
20180528_160357.jpg [ 1.64 MiB | Viewed 1300 times ]


Stay tuned for more updates soon!

Regards,

Pedro Martínez Díaz


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Sun Jun 03, 2018 1:34 pm 
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Victor I
Joined: Wed Jul 30, 2014 9:34 am
Posts: 159
Location: Spain
4th chapter of this restoration.

The main body of the carriage needed to be thinned to 8,2 mm so I milled it and sand it till I reached the desired thickness:
Attachment:
20180602_132727.jpg
20180602_132727.jpg [ 1.77 MiB | Viewed 1193 times ]

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20180602_135744.jpg
20180602_135744.jpg [ 1.43 MiB | Viewed 1193 times ]

Then I set up the compound carriage of the lathe to be able to cut the conical internal part of the tube:
Attachment:
20180603_170748.jpg
20180603_170748.jpg [ 2 MiB | Viewed 1193 times ]

After milling a slight curve on the body to make a perfect fit for the tube I soldered it:
Attachment:
20180603_190410.jpg
20180603_190410.jpg [ 1.33 MiB | Viewed 1193 times ]

I'm really happy how it turned out!
Attachment:
20180603_191900.jpg
20180603_191900.jpg [ 1.26 MiB | Viewed 1193 times ]

Next step will be reproducing this small "ear"
Attachment:
20180603_191142.jpg
20180603_191142.jpg [ 1023.85 KiB | Viewed 1193 times ]

Stay tuned for new updates!!

Best regards,

Pedro Martínez


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Mon Jun 04, 2018 4:49 am 
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Victor II
Joined: Fri Jan 06, 2012 6:22 am
Posts: 319
Pedro,
It's looking really good ! I am enjoying seeing you re-create this complex part. Can't wait for the next episode !!


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Mon Jun 04, 2018 9:16 am 
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VTLA
User avatar
TMF Moderator
Joined: Thu Aug 19, 2010 9:36 am
Posts: 2407
Location: Delaware
Always great to watch a wizard at work. Thanks for letting us be part of this.

Andreas


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 Post subject: Re: EWC Phonograph carriage restoration
PostPosted: Sat Jun 23, 2018 2:45 pm 
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Victor I
Joined: Wed Jul 30, 2014 9:34 am
Posts: 159
Location: Spain
Finally an update!

Sorry for this delay. I broke my right big toe in a home accident and badly sliced my left thumb (and its the second time this year!) so I couldn't walk in 2 weeks and and the thumb didn't helped to improve the situation.

Anyway, I have make a lot of progress and I have lots of pictures to share!

I reached the point of the restoration in which every step must be very well planned to not reaching a non returning point situation. The big problem is that I have no valid references on the old piece. Its so swollen and messed that nothing fits.

This is the best example of the situation. If I put the guiding tube and the lever on the old piece mothing is at right angles!
Attachment:
20180621_184319.jpg
20180621_184319.jpg [ 1.44 MiB | Viewed 733 times ]

So I opted to install my piece on the phonograph and measure and take the references. It's an exercise similar to taking the measures of an octopus...
Attachment:
20180621_191815.jpg
20180621_191815.jpg [ 1.92 MiB | Viewed 733 times ]

The first piece that I installed is the lower shaft. It must be accurately positioned to allow the half nut to reach the feedscrew and centered to allow the lateral sliding piece to rest flat against the body of the carriage.
Attachment:
20180621_194117.jpg
20180621_194117.jpg [ 1.62 MiB | Viewed 733 times ]

Attachment:
20180622_162827.jpg
20180622_162827.jpg [ 1.89 MiB | Viewed 733 times ]

Attachment:
20180622_162935.jpg
20180622_162935.jpg [ 1.69 MiB | Viewed 733 times ]

And voila! First piece installed.
Attachment:
20180622_165910.jpg
20180622_165910.jpg [ 1.4 MiB | Viewed 733 times ]

(More to follow in a couple of hours)


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