One of the most commonly incorporated parts to be found in these designs are Dremel-brand handheld tools, using router bits, attached to the Z-Axis. Well, I took a look at Dremel tools, at my local hardware store, Wal-Mart store, Target store, and a few other places, but I've found that they're all very expensive, for use in my upcoming project.
Well, I tackled this problem today. I built my "router" on an arm that will be attached to the Z-Axis on my CNC machine. Hopefully, others could use a similar tool, and will find this interesting.
Step 1: Tools Required
1/8" Steel-Cutting Drill Bit
3/32" Steel-Cutting Drill Bit
#4-40 SAE Tap
#1 Philips Screwdriver
#2 Philips Screwdriver
Step 2: Parts List
1 Solid Metal Rod, 3/8" diameter (or 1/4", if 3/8" is not available).
1 #4-40 SAE Screw, to act as a Chuck
1 Dremel-Brand 1/8" or smaller Router bit
2 flanged bearings, with I/D the same as the diameter of the solid metal rod.
1 pipe, with I/D the same as the O/D of the bearing.
1 electric motor, AC or DC, high RPM, medium Torque. (I got mine from a broken cordless drill)
Brass hobby tubing, with I/D the same as the diameter of the solid metal rod.
Scrap sheet metal.
A handful of Wood Screws.