Re: Making Flat secondaries - disaster #1...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Marry Krutsch by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>

> 
>         With regard to putting holes in plexiglass, I usually leave the drill
> in the box, and use a hot object to melt holes in it instead.  What bur
> is left easily comes off when "coaxed" with a sharp object, and the
> fumes aren't TOO bad :-).  It's better than sending shrapnel throughout
> your garage and destroying the piece in the process.

... Use a manual drill, or just lower speed, and advance little by
little,
never letting the drill bit to become hot enough to melt the acrylic.
Of course, fix your work while working.
Some water helps too. Holes made with hot objects are exactly what you
-don't- want when using a drill...

Antonio Carlos M. de Queiroz