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
>