i would guess the 20k rpm achieved by the small hand tool would be enough.
look here:
http://www.megauk.com/cgi- bin/mega/lp.pl?page=
http://www.megauk.com/pcb_drilling_machines.phpthey sell everything from dremel scrap to versions of the model you are
discussing.
i have no idea what cnc drilling machines cost but rather than investing 5k
pound in one of this optical hand
operated machines i would try to get a cnc machine.
i was also wondering how such a viewing device can be built, folowing would
be needed:
maginifying in the range of 10 or so
screen necessary, no eyepiece.
same picture regardless of viewer position, screen alerady ensures this (no
simple maginifying glass).
please also have a look at Variodrill High Speed Drilling Machine at the
url above.
this machine uses a simple magnifier. therefore the target has to be close
to the pcb.
i have seen this unit once but not tried.
Has anyone a idea how one could build a viewing device his own?
i know there is the option small camera and tv screen. i don't like much.
soe years ago there were "student microscopes" (ya know this cheap plastic
scrap) which also had a projection assembly which could be used as a
viewing screen (2" size or so).
i also can imagine using a microfilm viewer, but this unit would be rather
bulky to mount on a pcb drill.
any ideas are very welcome.
another requirement of the viewing device is that it is not allowed to be
mirrored image
(like in a microscope). it should be showing the image like it is, so that
easy use is possible.
has anyone used such a student microscope like this?
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=3135524120&category=11737it has a nice big screen.
but i would need to know if the image is mirroed or not, if i move the pcb
away from me it would move up on screen.
i think all this "projection scopes" have a similar optical assembly, if
anyone has used one please write.
regards
st
On Thu, 19 Jun 2003 18:07:10 +1000, Adam Seychell
<
adam_seychell@...> wrote:
> Thanks Tom , that makes it more clear. If its not too much effort, I
> would like to see a few basic pics of the machine you own. With Nawide
> machine having belt drive, what RPM did this run at ? I'm curious, what
> do you think is a "good" RPM for manual drilling around the 0.6mm -
> 1.5mm diameter range ?
>
> I know your talking 100k RPM and above for the very large and expensive
> Excellon CNC production drill machines.
>
> Was it quick to change drill bits on these machines ? My guessing is the
> spindle would feed far upwards so the collet pops up through the flat
> panel giving you access to it.
>
> Adam