From: hermit 
To: Alfredo Neves 
CC: atm{at}shore.net
Reply-To: hermit 


Alfredo Neves wrote:
>
> Hi,
>
> I've been finishing a small 4.5" F2 mirror and have detected some micro
> ripple. This mirror is being done on a machine. Could some of the more
> experienced folks give me some advice!
>
> foucalt image: http://www.geocities.com/arainho_cl/ripple.jpg
>
> I've been using quite hard pitch to prevent a turned edge, could this be
> the cause?
>

What speed are you using, and do you have 'weight' added?  My machine is on
the slow side.  When I through weight on, I get the smoothest finish.  You
can finish by hand if you feel the machine is too fast.

Ken

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