Even though I don't know jack about electronics, I've embarked on a journey to build a CNC. I've looked at different plans for some time using MDF or plywood, but I've read a few threads about not using wood for the main structure (such as Check twice!'s build: New-build-cnc-router
I even bought 2 DIY plans, one for a Rockcliff and the other for a Solsylva. Instead I'm going the Erector-set route and buying modular parts and extrusions. I think the most challenging part will be the electronics/software. I'm sure I'll be asking questions and hope I'll get help from time to time. I'm on the CNCZone, but that place is like a maze trying to sort through it sometimes.
The useable area is about 2ft x 3ft, and I think it will cost about $1,700. That is cheaper and have a larger working area than Rockler's smallest CNC I believe.
Most parts are from CNCRouterparts.com, and my electronics are from Finelineautomation.com since they had $50 off for Black Friday.
Electronics: Gecko G540 pushing 3 High-torque Nema 23 380 oz-in stepper motors finelineautomation 3 Axis Electronics Kit
Mechanical: Using Linear carriages that are basically ABEC 7 rollerskate wheels that ride on 1/4" thick cold rolled steel flatbar: cncrouterparts mechanical parts
(also purchased all necessary mechanical parts from them).
And the leadscrews are 1/2-10 5-start ACME threaded rod McMaster #98940A627
The 80/20 1530 & 3030 extrusion (1 1/2" x 3" & 3" x 3") is from the 80/20 Garage sale on Ebay. 8020inc
I'll be using my Porter Cable 690 router motor for the spindle.
For a general idea of what it will look like see this build: glacialwanderer
By the way, Fineline sells complete kits including all holes drilled in the extrusions and flatbar, but I'm saving money buy doing it myself.
I still need to buy:
Cold rolled steel flatbar
Wish me luck