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Subject: Re: [Homebrew_PCBs] Re: Scratch & Etch Process

From: "Stefan Trethan" <stefan_trethan@...>
Date: 2005-02-06

On Sun, 06 Feb 2005 19:09:43 -0000, onenastyviper
<oneNastyViper@...> wrote:

>
> Hi Brian,
> Polymorph is a low-fusing temp thermoplastic that can be moulded by
> hand or hot air. http://www.mutr.co.uk/prodDetail.aspx?prodID=576
> gives some info and ordering although I bought it at maplins in the
> UK.
> To stop the wobble...
> The HP stubby pen holder on the 7475A has enough structure to firmly
> hold the pen ∗if∗ pressure can be applied to the pen to hold it
> against the holder.
> I tried the traditional elastic band but this couldn't handle the
> torque and the pen wobbled.
> I then tried the polymorph by using it to force and hold the pen into
> position when set...so far it has worked well.
> I will put photos of what it looks like.
> The stylus was created from an old stubby pen holder and a tile
> scribe/cutter with a solid tungsten carbide bit bought at wickes in
> the UK.
> Hope this helps?
> regards PK.

I exchanged the spring in the pen holder with a stronger one, if that is
any help.

ST