Homebrew PCBs

Sorry  second pic added..

in photos ... spiyda drill2

it just hangs like a plumb bob

Chris

--- In Homebrew_PCBs@yahoogroups.com, "Jeff Heiss"  wrote:
>
> I would like to understand your setup but I am confused too.  I viewed the
> picture.  Is the drill/pole on a slide?  Or is it just hanging from the
> pulley like a plumb bob?
> 
>  
> 
> Jeff
> 
>  
> 
>   _____  
> 
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@...m]
> On Behalf Of chris
> Sent: Sunday, January 13, 2013 9:32 AM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: [Homebrew_PCBs] Re: What size drill bits?
> 
>  
> 
>   
> 
> Rick,
> 
> there is a rope (or string really.. I use light switch pull cord)
> the string goes from the counterweight (which is an old pill container with
> nuts and bolts in it), over the pulley and down to the aluminium pole..
> 
> the pole is about 3 feet long with the proxxon frmly fixed to the end.. The
> way I have it rigged, there is 2 foot clear of string between the pulley and
> the top of the pole
> 
> the role of the pole (rhyme :-) ) is partly to damp oscillation.. 
> I started with about a foot long and quickly realised in needed to be
> longer, the aluminium pole was just a bit of scrap from under the bench
> 
> In retrospect, the pole needs to be as long as possible without fouling on
> the pulley.. but what I put together works so I'm loath to fiddle with it..
> 
> An old fishing pole would probably be ideal..
> 
> I've put a picture in the photos spiyda drill
> 
> Chris
> 
> --- In Homebrew_PCBs@yahoogroups.com
>  , "Rick Sparber" wrote:
> >
> > Chris,
> > 
> > Elegantly simple! You get a very clear view of the place to be drilled and
> > quick action.
> > 
> > I sounds like it doesn't take long to develop the skill to make this work.
> I
> > have plenty of 0.75 mm drills to learn on ;-)
> > 
> > I'm confused about the pulley's role. Is the 3' rod resting on the pulley
> or
> > is there a rope attached to the pulley that supports the rod? 
> > 
> > Rick
> > 
> > -----Original Message-----
> > From: Homebrew_PCBs@yahoogroups.com
> 
> [mailto:Homebrew_PCBs@yahoogroups.com
>  ]
> > On Behalf Of chris
> > Sent: Sunday, January 13, 2013 7:00 AM
> > To: Homebrew_PCBs@yahoogroups.com 
> 
> > Subject: [Homebrew_PCBs] Re: What size drill bits?
> > 
> > 
> > 
> > --- In Homebrew_PCBs@yahoogroups.com
>  , Mitch Davis wrote:
> > >
> > > On Sun, Jan 13, 2013 at 10:59 AM, thb201 wrote:
> > > > I was looking to get some drill bits but I only want to get just a 
> > > >few sizes, especially if I spring for the more expensive carbide types.
> > > 
> > > Carbide bits stay sharp for a long time, but they are amazingly 
> > > brittle. The slightest sideways movement and *ping*, they're gone.
> > > It's not realistic to use them with something you hold in your hand.
> > > I have used a normal drill press with good results.
> > > 
> > > Mitch.
> > >
> > 
> > I use 0.8mm carbide bits in a hand held proxxon
> > 
> > I can usually manage a few thousand holes before the drill breaks..
> > 
> > My wife usually breaks the drill withing the first dozen holes or so..
> > 
> > I have been through several methods of drilling, including a commercial
> > drill press, a home made foot operated drill press, a CNC drilling machine
> > and ended up with the following
> > 
> > a pulley at ceiling height
> > 
> > a proxxon hand held drill fittted to about a 3 foot aluminium pole
> > 
> > the pole is suspended from the pulley with a counterweight giving it
> > slightly negative weight so that when you let go it goes upward, away from
> > the board
> > 
> > the very end part of the proxxon has a rubber grommet fitted.. and it it
> > this that is held lightly between finger and thumb..
> > 
> > this setup keeps the holes vertical and reduces hand and arm strain..
> > 
> > using this, my wife can drill almost as many holes as I can before
> breaking
> > the bit..
> > 
> > I manage about 2 holes a second when they are close together..
> > with an average of about 1 per second over a longer period
> > 
> > thats a fair bit faster than my CNC machine can do.. when things like
> > clamping and regictration are included.
> > 
> > Chris
> > 
> > 
> > 
> > 
> > 
> > ------------------------------------
> > 
> > Be sure to visit the group home and check for new Links, Files, and
> Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>