[modeleng] Re: Screwing the job up

Ooops Pete - coarse metric is about 1.5mm (I think) a 6mm thread has a 1mm
pitch

----- Original Message -----
From: "Peter Sheppard" <peter.sheppard@xxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Monday, April 18, 2005 10:06 PM
Subject: [modeleng] Re: Screwing the job up


> Hello Clif,
>
> Yes I am allergic to "buy", but the main reason I chose 11TPI was that
using
> the 12v geared motor from RS (which I bought) and the amount of travel on
the
> Eaton gearbox means that it is approximately 4 seconds from full forward
to
> full reverse.  Any finer pitch and I reckoned that it would be
uncontrollable
> (the usual Metric pitch is 1mm which is approximately 25TPI) and thus
twice as
> fast, and I looked, but I couldn't get a motor with a further 50%
reduction in
> speed.
>
> I hope that's clear!
>
> Cheers
>
> Peter
>
> --------------------------------------------------------------------
> Peter Sheppard BSc (Hons) CEng FIEE FIRSE FSaRS
> Principal Consultant
> Lloyd's Register Rail Limited
> 5th Floor, 37-39 Corn Street
> Bristol BS1 1HT
>
> T: 0117 929 4443
> F: 0117 929 4554
> M: 07760 167 617
> E: peter.sheppard@xxxxxxxxxx
> --------------------------------------------------------------------
>
>
> On Monday, April 18, 2005 12:49 PM, Clif Walker
[SMTP:clif.gwr@xxxxxxxxxxxxxx]
> wrote:
> > Hi Peter,
> >
> > Why not just go out and buy a length of Metric studding. About 3 foot
costs
> > a couple of pounds at a hardware store.
> > Or is it that word BUY.
> >
> > Regards
> >
> > Clif
> > ----- Original Message -----
> >
> >
> >
> > --
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> >
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