--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> On Sun, 13 Jun 2004 19:47:09 -0400 (EDT), <dg140@f...>
> wrote:
>
> > How does ABS and PP handle the heat generated by drilling? I
have to
> > also
> > mill some ABS.
> >
>
> my main problem with plexi is:
> melting -> binding -> shattering
> when drilling larger holes.
>
> not sure about small drills and abs, might break the drill which is
no
> issue with big ones.
>
> but generally the material is nicer to work on.
>
> st
heat is the killer on plastics.
also clearing chips is vital. if a chip gets between the cutter and
the stock being cut, it acts like a slippeery wafer and the sliding
generates bucnhes of heat. if you can use compressed air to blow
away the chips as they are being created it will do a lot to keep
things cool.
also, if you are cutting out a perimiter ie: all the way thru, leave
a place for the chips to fall out. if you put a board under and not
space, the chips will bind.
Then cutting a pocket, getting the chips out with air or liquid is
important.
Dave