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Frozen Motor Question

Frozen Motor Question

2007-05-15 by Berington Van Campen

Hey everyone! Glad to be the newest member of this "elite"
community! Have owned M-400 #1485 since 1977, & it's figured
prominently in my music (at the time esp., very Yes- & Genesis-
influenced, as well as Beatles, Crimson and others...). Suffice it to
say, since '77 it's been a huge boon to my music career. I should
add, I made the SMS3 conversion, etc, and being a VERY clean machine,
it's operated beautifully with only routine maintenance. Learned to
clean motor brushes, etc.
Sadly, in my mainstay scoring work, the advent of MIDI equipment,
sequencing & mixing direct to digital recorders, bypassing tape
altogether, made using the Mellotron a rarity. Periodically I'd fire
it up just to make sure it stayed lubricated, etc, and it always
delivered the thrill of playing what's a truly wondrous instrument
even to this day.
More recently, getting back into live performance as a guitarist,
I've wanted to get that M-puppy back into circulation, and found the
motor VERY sluggish. Soon stalled altogether, and while trying to
encourage the capstan to turn, I began smelling an electrical
burning, and of course, killed the power immediately. Examining the
motor, I found a couple of resistors (I believe… they're pretty
fried!) attached to it that had burned. I have the original owner's
manual w schematics, the old CMC-10 board & other docs, but can't
seem to locate `em at the moment. Do any of you have such experience
with your instruments, and/or have any ideas how to proceed to un-
stick the motor, replace the burnt parts, and restore my once-happy
baby to its previous state? Or is there anyone in the L.A. area I
might talk with? I'd appreciate any suggestions! Thanks muchly in
advance! ~B.
P.S. – A photo of #1485 appears on my MySpace site under "View my
pics" at www.myspace.com/berington.

Re: Frozen Motor Question

2007-05-16 by Doug Berg

--- In Mellotronists@yahoogroups.com, "Berington Van Campen"
<vcmusicorp1@...> wrote:
>
> Hey everyone! Glad to be the newest member of this "elite"
> community! Have owned M-400 #1485 since 1977, & it's figured
> prominently in my music (at the time esp., very Yes- & Genesis-
> influenced, as well as Beatles, Crimson and others...). Suffice it
to
> say, since '77 it's been a huge boon to my music career. I should
> add, I made the SMS3 conversion, etc, and being a VERY clean
machine,
> it's operated beautifully with only routine maintenance. Learned
to
> clean motor brushes, etc.
> Sadly, in my mainstay scoring work, the advent of MIDI
equipment,
> sequencing & mixing direct to digital recorders, bypassing tape
> altogether, made using the Mellotron a rarity. Periodically I'd
fire
> it up just to make sure it stayed lubricated, etc, and it always
> delivered the thrill of playing what's a truly wondrous instrument
> even to this day.
> More recently, getting back into live performance as a
guitarist,
> I've wanted to get that M-puppy back into circulation, and found
the
> motor VERY sluggish. Soon stalled altogether, and while trying to
> encourage the capstan to turn, I began smelling an electrical
> burning, and of course, killed the power immediately. Examining
the
> motor, I found a couple of resistors (I believe… they're pretty
> fried!) attached to it that had burned. I have the original
owner's
> manual w schematics, the old CMC-10 board & other docs, but can't
> seem to locate `em at the moment. Do any of you have such
experience
> with your instruments, and/or have any ideas how to proceed to un-
> stick the motor, replace the burnt parts, and restore my once-
happy
> baby to its previous state? Or is there anyone in the L.A. area I
> might talk with? I'd appreciate any suggestions! Thanks muchly in
> advance! ~B.
> P.S. – A photo of #1485 appears on my MySpace site under "View
my
> pics" at www.myspace.com/berington.
>
Hello B: Guess to start with obvious, loosen belt from motor and
see if motor turns freely. If not check for any obstructions, does
tach wheel clear head? Are motor bearings dry? Next, look at
armature and commutator for any burned windings, really dark brown,
The next step would be to remove armature and with ohm meter check
for shorts in windings and on commutator. If resistors at motor are
burned, they can easily be replaced but were not the cause of
malfunction but the result. Could be capacitor gone bad, when you
find your schematics you will be able to determine value. Last to
check is SMS3 card, hopefully you have checked edge connectors on
card for snug fit and proper insertion. These are basics, so if and
when you find problems, you can look for specific areas. Remember
if voltage to motor decreases, current increases, and things will
quickly fry. Let us know what you find, and BE CAREFUL. Doug

Re: [Mellotronists] Frozen Motor Question

2007-05-16 by Mike Dickson

Berington Van Campen wrote:
> Hey everyone! Glad to be the newest member of this "elite" community!
Greetings. We're *not* that elite; we even let Canadians in.

--
Mike Dickson, Edinburgh

Re: Frozen Motor Question

2007-05-16 by James Bailey

--- In Mellotronists@yahoogroups.com, Mike Dickson <mike.dickson@...>
wrote:
>
> Berington Van Campen wrote:
> > Hey everyone! Glad to be the newest member of this "elite"
community!

> Greetings. We're *not* that elite; we even let Canadians in.

Yeah, and even 'tronless ones like me!

Jim Bailey

Re: [Mellotronists] Frozen Motor Question

2007-05-16 by Rick Blechta


On May 16, 2007, at 7:50 AM, Mike Dickson wrote:

We're *not* that elite; we even let Canadians in.

--
Mike Dickson, Edinburgh

But the Canadians may not let you back in after on the havoc you "reeked" on your last trip here.

Rick

Re: Frozen Motor Question

2007-05-16 by Berington Van Campen

WOW! You guys are tremendous!! I appreciate such a response, and so quickly!
To Martin, thank you for your referral to your local Streetly rep here in Sunland, Paul Cox. (pjc56@...) Sounds like the way to go if I can’t sort it out myself, following several suggestions. Sunland’s only about 20 minutes from where I live, so that’s exactly the kind of info I was hoping for. By the way, the “legendary” M-4000 sounds fascinating… first I’ve heard of it here, but it sure has been the topic of much (hopefully ALL good-natured!) ribbing! I look forward to hearing about it, too, but all in good time, yes? Remember the Kurzweil “phantomware” piano? It was advertised IN MAGAZINES for like, 2 YEARS, before anyone ever played one! Now that fine instrument’s almost “old hat!” I’m sure when the 4000 is ready for unveiling, you’ll be the first one WANTING it to get out there! In the meantime, some of the comments have been cracking me up! Not uppin me crack, mind you… I’m leavin’ that one alone! HA! Ahh yes, a little twisted humor is a lovely thing…
Doug Berg, thank YOU for your sensible suggestions to get at least a diagnosis! They make all the sense in the world, and I look forward to getting’ TO ‘em! That’s exactly the kind of stuff I was hoping for! I KNOW I’ve seen that damn manual not too long ago, too! I can visualize it… I’m sure it’s in my studio somewhere. Makes me crazy. I’ll find it sometime when I’m not looking for it. But yes, I’m sure it has resistor and cap values in the hand-drawn schematics. I’m sure you’re QUITE right, too, that the resistors are a result, NOT the cause.
To Frank, your offer to fix it if I send it to you is most appreciated, as well. And a damn good price, too! (By the way, the rest of you should check his site if you haven’t already, at www.myspace.com/trondoc. BEAUTIFUL restoration work!) Your suggestion to change the capstan bearings is undoubtedly a wise one, especially for such relative ease of doing. And it seems, as you say, something that should be done just on general principles after such a lengthy time. As far as the motor rebuild, yes it does sound do-able. As far as the chokes, possible resistors, caps and all go, might I be able to buy any parts through you? You’d surely know the correct values, and that’d be the LEAST I could do for your generous assistance and guidance. Of course, your suggestion to just go with the new motor through Streetly is undoubtedly the best, particularly since they’re such better motors. And considering Martin’s info earlier, a pretty easy one, too. Still, the rebuild is certainly less expensive for the time being, and would be an interesting project, too, if I chose to do it myself.
And lastly, to Mike Dickson, up in Edinburgh ! HA! Thanks for your greetings! As to Canadians, well, MY only beef with ‘em is they insist on playing everything in the key of “eh?” (HAD to say it… it was right there… right there… )
Thanks everyone! I look forward to any more feedback; I’ll let y’all know what I do, and of course the results. It’s great to get acquainted with you all! #1485 thinks so, too.
All the best,
Berington


Berington Van Campen
Van Campen Productions / VCMusiCorp
VCMusiCorp1@...
(626) 458-4474 Home/Office
(323) 821-0411 Cell

Re: [Mellotronists] Re: Frozen Motor Question

2007-05-17 by Mike Dickson

James Bailey wrote:
> --- In Mellotronists@yahoogroups.com, Mike Dickson <mike.dickson@...>
> wrote:
>
>> Berington Van Campen wrote:
>>
>>> Hey everyone! Glad to be the newest member of this "elite"
>>>
> community!
>
>
>> Greetings. We're *not* that elite; we even let Canadians in.
>>
>
> Yeah, and even 'tronless ones like me!
>
And even gormless ones like Blechta.

--
Mike Dickson, Edinburgh