Re: ATM My New Gringing Machine

[Alfredo Neves <arainho_cl@yahoo.com>]

Hi Jim,

I got a small chineese lathe (US$ 300 kind) and a
sherline mill. I am not an experienced machinist.
After completing my first mirror (6" f2.5), I decided
that hand gringing was not for me and spent the last
two months building the machine.

I got my ideas from the following web site:

http://www.turbofast.com.au/astrotel/

The bowl is an aluminium frying pan! If I can help you
in any way let me know!

Alfredo


--- Jim Miller <jim@jtmiller.com> wrote:
> Alfredo
> 
> Very nice! You obviously have access to a machine
> shop. Did you do the
> machining yourself or did you get it done?.  I don't
> have a lathe and am
> curious what it would cost to get some turning done.
> 
> I've been looking at various types of machines as
> well, some using the hinge
> (Elgin and derivatives) and some using the support
> arm such as yours.  How
> did you decide between them?
> 
> I've found the links for grinding machines to be
> pretty sparse, most are
> broken on my google searches.  How did you come by
> the ideas for your
> machine?
> 
> What did you use for the bowl?
> 
> Let us know how it works!
> 
> Thanks!
> 
> jtm
> 
> ----- Original Message -----
> From: "Alfredo Neves" <arainho_cl@yahoo.com>
> To: <atm@shore.net>
> Sent: Tuesday, June 11, 2002 7:08 AM
> Subject: ATM My New Gringing Machine
> 
> 
> 
> Hi All,
> 
> Just finished my grinding machine and would like to
> share it with wonderfull participants of this list.
> 
> http://www.geocities.com/arainho_cl/gmachine.jpg
> 
> For those who like more details: The machine is
> powered by a Siemens 1/3 HP AC motor with a 1:50
> reduction gear box. From the gear box I used pulleys
> to drive the stroke and the table. I have two
> operating speed achieved by changing pulleys:
> 
> Stroke   Table
> 22        44      Gringing
> 22        7       Polishing
> 
> I will be trying the spining method where the mirror
> is on the bottom and the over arm is fixed.
> 
> 
> Alfredo
> 
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