I should mention that its pretty easy to make a decent little drill 
press for a Dremel tool.  I don't draw well, so I hope that a verbal 
description suffices.

Cut a couple of squares of 3/8" or 1/2" thick MDF or similar to 3.5" 
square.  Drill round holes that will fit the Dremel tool - a small 
hole that very tightly fits near the front of the Dremel, a larger 
hole that fits the back end of the tool.  Cut a single slot from the 
middle of one side through to the hole, drill a small hole that that 
takes a wood screw such that tightening up the screw will tighten up the slot.

Mount the Dremel tool into the squares of MDF.  Line them up so that 
the sides are parallel to each other.  Just lay the Dremel tool on 
its side, allow the pieces of MDF to lie flat on the table, tighten 
up the slots.

Now grab a piece of 2 X 4 lumber 12" or so long.  You also need 4 
pieces of thin, long material - wood, aluminum, steel, 
whatever.  Needs to be about 3/4" or 1" high, 1/8" thick, perhaps 8" 
long.  Something that looks like giant Popsicle sticks.  A cut-up 
yardstick or paint-stirring sticks work well.

Drill a 1/8" or 9/64" hole near each end of the 4 sticks (1/2" or 
so).  You can stack all 4 and drill at the same time, if you 
wish.  You do want all the holes to be in about the same location.

Figure out how you are going to hold that piece of 2 X 4 
vertical.  You could bolt it to a base, or screw it to the back of 
your workbench (assuming a narrow bench), or whatever.  It needs to 
be vertical, both left to right as well as front to back.

Now measure how long the Dremel tool is with a typical drill bit 
mounted in its collet from the tip of the drill bit to the middle of 
the MDF squares.  The idea is that you are going to use the 4 sticks 
to mount the Dremel tool to the 2 X 4 such that then the drill bit 
has penetrated the PCB material that you are drilling, the sticks are 
straight out from the tool to the 2 X 4.  Mount the sticks, make sure 
the screws are just tight enough that you can move the Dremel tool up 
and down but NOT side to side.  Use #4 screws if the holes are 1/8", 
#6 screws if the holes are 9/64".  Flat steel washers on both sides 
of the sticks (between the wood surfaces as well as between the screw 
head and the stick) make the whole thing move up and down much easier.

Add an elastic band or two from the bottom piece of MDF at the front 
of the Dremel tool to somewhere higher up on the 2 X 4 - that's the 
return spring that lifts the Dremel tool up and away from the PCB material.

Note that the bit will move ever so slightly front to back as the 
sticks that hold the Dremel to the 2 X 4 move up and down in an 
arc.  Longer sticks minimize that effect.

That's pretty much it.  Less than an hours work.

dwayne

-- 
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

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