OldSynths

Rory

Thanks for offering to help, but in the end I found someone at work who has 
a hobby interest in making plastic items. He has made a handful of perfect 
replicas for me, indistinguishable from the originals!

Cheers

Richard Craven
England

----- Original Message ----- 
From: "ascii_me" <rorymcd@...>
To: <oldsynths@yahoogroups.com>
Sent: Tuesday, June 21, 2005 3:30 PM
Subject: [oldsynths] Re: WTB: replacement knob for Korg MS-10 or 20 etc.


> Can you send me a pic of the knob you are looking for?
> I may have it.
> Email to rorymcd@...
> Thanks
> Rory McDonald
> OldSynths Moderator
>
>
> --- In oldsynths@yahoogroups.com, "Marvin Kaye" <marv@l...> wrote:
>>
>> HI again, Richard,
>>
>> I've been kicking around the idea of molding up some other (non-
>> musical) parts for awhile, and this little episode has finally pushed
>> me over the edge.  I went ahead and ordered some molding silicone,
>> release agent, and black urethane casting resin.  I imagine I'll have
>> all the "fixins" by next weekend.  Naturally I had to order enough to
>> make 200 slider knobs, but if I have good luck with my parts I'll be
>> glad to make you a copy of yours... although all that shipping back
>> and forth across the pond could make this a very long process.  I've
>> been working with composites for a number of years, although this
>> will be my first venture into do-it-yourself injection molding, so
>> I'm looking forward to the new challenge.  My slider knob has a 1mm
>> thick white (pointer) line that runs horizontally around its
>> circumference that adds a bit more challenge to the project... I'm
>> thinking I'll make an initial cast part into which I can mill the 1mm
>> slot around its middle (it's nice to have a machine shop at hand) and
>> use that to create a new exterior mold, then use an actual knob to
>> mold the rear, with the notch for the slider shaft.  One advantage to
>> this approach is that the parting line will be at the exact back of
>> the knob, so any flash will be removed invisibly.  Once the black
>> part is released from the mold I can apply some white casting resin
>> to the slot, sand away the excess and polish off the whole thing once
>> it's all cured up.  A ton of work to duplicate a 50 cent part, but at
>> least it will be right.  I just hope the casting resin's black
>> matches the black of the original knob.  We'll see.
>>
>>  <marv>
>>
>>
>> --- In oldsynths@yahoogroups.com, "RMC" <rmc@r...> wrote:
>>
>> > if I do get anywhere with making a mould, I will let you know.
>> Thanks for
>> > getting in touch - at least we both know we aren't alone in our
>> feeble
>> > quest!
>> >
>> > Cheers
>> >
>> > Richard Craven
>> > England
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
> --
> This email has been verified as Virus free
> Virus Protection and more available at http://www.plus.net