Homebrew PCBs

George,

I did some quick maths and on my jury rig, the alignment from one 
side of the board to the other will be within 0.01 of a millimetre 
at worst, and considering my eyes are only accurate to about 0.25mm 
when drilling, I don't think it really comes into the equation.

I have the drill bit sitting about 1 - 2 mm above the board when the 
pedal is not pressed, and it projects through the board about 1mm at 
full downstroke..  so total travel is only about 5 mm

Chris

 --- In Homebrew_PCBs@yahoogroups.com, "soffee83" <soffee83@y...> 
wrote:
>
> Pardon the dumb question, but what is a pivoting press?
> 
> It sounds like a hinge type of carrier instead of vertical 
movement.  
> (?)
> 
> Sounds scary. I have enough trouble with double sided stuff not 
lining 
> up top to bottom. 
> 
> I still think that with extra thick wooden standoffs on more than 
one 
> "large enough" pipe, or more than one at the top and bottom of the 
> drilling unit, plus a "centered" upward pull, it shouldn't have 
enough 
> play to screw up most previously etched holes. I do have a fair 
amount 
> of wood tools here, so it may be more of a bitch without them. The 
> only critical parts are really the two holes that the pipes ride 
> through, and they would be done with a 1" holesaw or something 
anyway. 
> The rest would only have to be screw eyes and junk, and the shapes 
> could be whatever's easiest. I think with a piloted straight 
cutter in 
> a router, I could clone and mass-cut a few standoffs without much 
> hassle. If you did three of the standoff triangles glued together, 
> you'd have a full 2.25" of support along the pipes. It doesn't 
seem 
> like it could move around that much, but this is for sort of "pre-
> piloted" holes.
> 
> Again this is "paper theory" and most of us know how that often 
goes 
> after it hits earth. ;)  If I can control my compulsive buying 
habits 
> for a bit and don't end up with Dremel press, I may try a simple 
pine 
> one, to see how it performs. I've got Christmas presents to build, 
so 
> if it looks like too much time, it's out.
> 
>                               -Take Care
> George
> 
>                                    -George
>