At 07:04 AM 7/28/2009, Carl Denk wrote: >I wouldn't use hinges, but the horizontal from the back to the front, a >pair of 2" to 3" wide x 1/4" or 3/8" wide plywood strips. I posted a text description a couple weeks ago of a very simple parallelogram-style drill press much like the one that Solarwind linked to (Instructables web-site). I was going through some old notes and see another, even simpler drill-press suitable for a Dremel tool that I had played with many years ago. Measure the distance from the front of your workbench to the back. Cut a piece of 1 X 4 wood to about 2" less than that length. You can use a strip of 1/2" plywood 2" to 3" wide instead of real wood if that's what you have handy. Near one end (1" - 1.25" away), drill a hole very slightly smaller than the diameter of the Dremel tool's nose-piece. That's the plastic nut that you would unscrew and remove if you were to add a flex-shaft to the Dremel tool. Cut a slot from the end of the wood through to the hole you just drilled, then drill a small hole suitable for a screw to clamp the slot shut. The idea is to stick the Dremel tool through the hole in the piece of wood and clamp it tight. Now grab a short piece of 2 X 4 perhaps 4" long. Screw it cross-wise to the end of the wood strip opposite the Dremel tool. Now just screw or clamp that whole assembly to the back of the workbench such that the Dremel tool is sitting near the front of the bench. The collet should be perhaps an inch and a half above the surface of the bench. Cut down the height of the 2 X 4 if you have to. You want to adjust the height of the 2 X 4 such that the tip of the drill bit is sitting 1/4" or so above the sacrificial surface that the PCB will be sitting on (on top of the workbench surface). You *do* want a sacrificial surface to drill into so as to not wreck the bench-top. Just set the PCB on top of that material - tape it down if you want. It should slide around easily. Using it is simplicity itself: just push down on the wood strip and the drill bit goes through the PCB material. Let go, and the natural springiness of the board lifts the Dremel tool back out of the PCB. You will note that the travel of the drill bit describes a very shallow arc as it moves. That is simply not a problem, assuming that the wood strip is somewhere near 34" or so long. Assuming that you have suitable wood scraps handy, this shouldn't take more than a few minutes to build. It has the distinct advantage that there absolutely NO movement of the drill bit either sideways or front-to-back, only up and down. Its also about as inexpensive as you can get. Hope this helps! dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist