[PSUBS-MAILIST] Viewports

[Marc de Piolenc via Personal_Submersibles]

Thank you!
Marc

On 9/9/2014 11:25 AM, Brian Cox via Personal_Submersibles wrote:
> Basically I cut a large sheet of Acrylic (4'x 3'x 1 1/2") into squares on a table saw, then the squares I took over to the band saw and cut them into 6" dia circles.  I will still need to clean them up in the lathe to get them perfectly round then anneal them..  Care needs to be taken with the cutting not to overheat the material, too fast or too slow can be a problem.  The book recommended a very high cutting speed for the band saw -4000 feet per min,  the saw I was using was only 650 fpm  - it seemed fine, no heat.  Not sure why they listed such a high speed.
>
> Brian
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Marc de Piolenc via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Viewports
> Date: Tue, 09 Sep 2014 10:24:03 +0800
>
> Details would be welcome! What are the peculiarities of machining acrylic?
>
> Marc
>
> On 9/9/2014 7:16 AM, Brian Cox via Personal_Submersibles wrote:
>> Cut 23 acrylic viewports today at the local collage machining class
>> Brian
>>
>>
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>

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