Summary

One of my homemade CNC machines. This is a relatively cheap version. The linear guides consists of 608zz bearings and plumbing pipe

NEW version available here:
http://www.thingiverse.com/thing:1659021

Instructions

BOM:
Plumbing pipe Â½" 21,3mm outside diameter:
2x550mm
2x270mm
2x776mm

42x 608ZZ bearings
12x 1Â½" U-bolts (see picture)
2 metres of 8mm threaded rod
6x M8 long nuts (coupling nut for assembling two rods)
32x M6x50mm bolts
32x M6 (10mm diameter, 20mm in length) furniture assembly nuts (see picture)
24x M8X16mm bolts
24x M8 Nuts
Aluminium angle 20x20mm 1.5mm thickness
Around 2m M5 threaded rod for mounting the steppers and the dremel
52x M5 nuts
16x M5 spacers
Rubber fuelhose with inner diameter of 5-6mm for holding the dremel and for steppercouplings.

22mm MDF - for all the parts

Electronics:
3 Nema 23 steppers
Any stepper driverboard ( i can recommend those from http://cnc4you.co.uk/ or gecko G540)
Power supply according to the driverboard and stepper specifications
And of course, a Dremel

more parts to come...

In this version i have used a cheap china stepper driver board from ebay. I can only say that you get what you pay for! It is possible to get it to work with the cheap boards, but you have to go really slow to avoid missing steps. They are not designed very good, and tweaks found on the net does not make them much better. I have used Gecko G540 with great succes, it is a superb board. But also a breakoutboard combined with the cheap stepper drivers from the link in the BOM does a great job like the Gecko.

Software used for running the machine:
Mach3
Linux EMC2

CAM program used:
Lazycam

Unfortunately i only have a very poor video of the machine in action. I have sold it, so i can't make a new video. The video is played at played at 4 times original speed.
http://www.youtube.com/watch?v=MEzmb7wuGx0

The thing is marked as work in progress as i will continue to fill out the BOM and also write some instructions if anyone is showing interest in this.

Cheap CNC Router