Homebrew PCBs

Chris,

It would be really cool if it could be gyro stabilized. 

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of chris
Sent: Sunday, January 13, 2013 7:17 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: What size drill bits?


and a quick video.. of the counterbalanced pulley mounted drill

http://youtu.be/flufbYNz48c

you can see the slight wobble that would be damped by a longer pole...

but it doesn't seem to break bits even as it is..

ps  thats my lot..  if I haven't explained it well enough now..  I never
will !

Chris



--- In Homebrew_PCBs@yahoogroups.com, "chris"  wrote:
>
> 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@yahoogroups.com]
> > 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]
> >
>




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