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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc.

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Old 15th Sep 2012, 6:45 pm   #81
Station X
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Default Re: Akai Cams.

I've just compared 4000 DB and 4000 DS record/playback cams.

The only real difference is that the centre hole is rotated 30 degrees clockwise or anti-clockwise, about its centre, depending on which cam you use as a reference.

It's true that the underside of the 4000 DB cam is hollowed out and the "bowl" of the cam is replaced by a flat, but that makes no difference to the operation.
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Old 6th Jan 2013, 11:24 pm   #82
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Default Re: Akai Cams.

Although the cams in my 4000D appear to be OK, I still have bad dreams about cam collapse. I am wondering if it is worth the effort in removing both cams, then try and persuade someone at my works to do a proper 3D cad drawing of each. I really don't know how long I will have the opportunity to do this so perhaps I should strike while the iron is hot? Anyway, we do have a 3D printer at work so perhaps a model could be made to ensure a proper fit but what then? Would it be possible to get these machined from solid aluminum or Brass? I know our machine shop can do wonderful things bit turning out these cams may be too much of a task for the machines we have. So would it be possible to get someone to do castings? It's a shame this thread has gone quiet as I was really hoping that a successful outcome was going to be made so that I could just order some replacements. There must be quite a few people, including those in the States, that would like the opportunity to get new cams. Would it be possible to have two internal flats so that a standard cam fitted both machines? I have some sketches of the cams so perhaps showing a copy of these to certain persons at work may be a good start, at least I would be able to ascertain the feasibility of it all. If only to reduce the number of nightmares
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Old 7th Jan 2013, 12:55 pm   #83
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Default Re: Akai Cams.

Why not ask Graham?

Colin
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Old 7th Jan 2013, 2:32 pm   #84
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Default Re: Akai Cams.

I have mentioned in these threads that I've made record/play cams using a CNC miller. I have produced DXF drawings which were used to generate GCODE.

There are two designs of record playback cam the only essential difference is the angle of the flats on the shaft relative to the cam profile, the profile is the same for both types.

The only problem I encountered was that a very small cutter is needed to cut the centre hole. These are delicate and have restricted length.

So far no one has expressed any interest in these cams.
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Old 8th Jan 2013, 2:17 am   #85
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Default Re: Akai Cams.

wow! I thought the possibility of re-made cams was dead in the water. I would certainly like a spare cam for my 4000D. I gather the other cam is much trickier owing to the extrusions (if I may call them that) on the underside. Please PM me Graham if you have a cam for sale, regards, Les
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Old 9th Jan 2013, 10:17 am   #86
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Default Re: Akai Cams.

I'll contact you in the next week or so.
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Old 20th Aug 2013, 1:53 am   #87
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Default Re: Akai Cams.

Quote:
Originally Posted by Station X View Post
I have mentioned in these threads that I've made record/play cams using a CNC miller.
Greetings from Brooklyn, New York,
Recently the Play/Record cam on my Roberts 800X deck broke and I'm looking for a replacement. Would these cams that you have produced work with this unit? I can post a picture of the fragment that isn't dust if necessary.
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Old 20th Aug 2013, 8:49 am   #88
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Default Re: Akai Cams.

Sorry, but I have no knowledge of the Roberts 800X deck.

One of our resident tape recorder experts may be able to advise.
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Old 20th Aug 2013, 11:40 am   #89
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Default Re: Akai Cams.

I believe it is a rebranded Akai M9. Thanks.
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Old 20th Aug 2013, 3:40 pm   #90
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Default Re: Akai Cams.

I guess you're looking for cams like those shown in this thread:-

https://www.vintage-radio.net/forum/...ad.php?t=50469

I've never tried making these as I don't have a sample to work from.

If someone could produce a drawing in .dxf format I'd be prepared to have a go.
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Old 20th Aug 2013, 6:05 pm   #91
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Default Re: Akai Cams.

Yes. The cam at top left looks exactly like what I need. The one with two screws.
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Old 6th Nov 2013, 7:18 pm   #92
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Default Re: Akai Cams.

Hi Chaps
I too have an immaculate 4000DS (Mk1) which has the failed cam syndrome. Did you ever get to making these cams? If so can I buy the ones I need? If not I have measured and sketched them out and will endeavour to produce a DXF drawing from my sketch if anyone's interested?
Best regards
Andy
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Old 6th Nov 2013, 8:20 pm   #93
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Default Re: Akai Cams.

Hi again everyone. I've just drawn up the record change over cam from my Akai 4000DS, having taken careful measurements from the broken (temporarily glued back together) part. I have attached a PDF of the part
Best regards
Andy
Attached Files
File Type: pdf AkaiMZ317068.pdf (10.5 KB, 772 views)
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Old 6th Nov 2013, 8:49 pm   #94
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Default Re: Akai Cams.

That appears to be different to the 4000 series record/playback cams I've had pass through my hands. See posts #76 and #81.

Could you post a picture of the stuck together bits?
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Old 1st Apr 2014, 10:38 pm   #95
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Default Re: Akai Cams.

My first post here, although I've been a member and occasional visitor for some time.

A while ago I was fortunate to be given an Akai 1800L (combined reel to reel and 8 track cartridge) - unfortunately the cams are showing their age and are unlikely to survive much longer.

Is it possible to source a set of replacement cams for this unit?

Mike

Last edited by Michael Maurice; 2nd Apr 2014 at 8:09 pm. Reason: correction of model number.
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Old 20th Apr 2015, 7:45 pm   #96
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Default Re: Akai Cams.

Hey guys. I'm still looking for 4000DS cams. Has anybody had any luck finding some?
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