[Coco] Coco KB membrane replacement

[Arthur Flexser]

There's a good set of instructions for repairing the keyboard membrane
here, from Chris Osborn, who I believe is a member of this list:  Chris, if
you're out there, is that keyboard you repaired in 2013 still going strong?

http://www.insentricity.com/a.cl/210/the-future-of-the-membrane-empire

Art

On Sun, May 14, 2017 at 3:19 PM, Scott Wendt <malfunct at msn.com> wrote:

> The membrain is just plastic sheets with traces on them. No hard PCB board.
>
> ________________________________
> From: Coco <coco-bounces at maltedmedia.com> on behalf of RWAP Software <
> rich at rwapservices.co.uk>
> Sent: Sunday, May 14, 2017 11:35:23 AM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Coco KB membrane replacement
>
> Is the membrane an actual hard PCB rather than a plastic membrane (with
> silver tracks)?  Sending a picture would be an idea
>
> I have never looked into replacement PCB membranes and so far as I know,
> the supplier I use does not provide these (because they specialise in
> small quantity membrane keyboards), but might know a producer.
>
> Rich Mellor RWAP Software www.rwapsoftware.co.uk<http://
> www.rwapsoftware.co.uk> www.sellmyretro.com<http://www.sellmyretro.com>
>
> On 2017-05-14 17:21, RETRO Innovations wrote:
> > On 5/14/2017 3:37 AM, RWAP Software wrote:
> >> That seems excessive - but it depends on how many membranes you would
> >> order.
> > That price is for 100 units.  NRE cost is 804.00.  Unit price is
> > 52.60.  That is actual cost, so no profit built into those prices.
> > Does not include shipping, customs, etc.
> >> The majority of the cost of setting up a new membrane production is
> >> the initial laying out and graphics.  Most membrane manufacturers also
> >> price themselves out of the market because they are not interested in
> >> small production runs.
> > I will do the layout, as it's just a PCB, and I can send gerbers.
> >>
> >> If I had an actual membrane I could always ask the manufacturer I use
> >> here in the UK.
> > I'd love to get an estimate from them.  I have the membrane (well,
> > lots of folks can get it.  You can easily remove from the KB
> > assembly), but I think if they just knew the dimensions and saw a pic
> > of the flattened membrane, they could estimate.
> >> The problem is knowing how many to order - realistically you are
> >> talking of a production run of at least 250 membranes to make it
> >> worthwhile from a cost basis.
> > Possibly 250, but I would assume the per unit cost would not halve,
> > and that still seems high.
> >
> > Jim
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>