Cnc electronics

sites

 * http://www.cncgeeker.com/
 * http://www.cncrouterparts.com/crp100-00-2-x-3-machine-plans-p-49.html Free cnc plans
 * http://www.harmonicdrive.net/products/gearheads/hpg-quickconnect/ . 4ht axis cnc created with planetary gear from harmonic drive. Gear is bolted to aluminum block and coupled to gecko stepper motor.
 * http://benezan-electronics.de/shop/product_info.php?cPath=8&products_id=61 Tripple beast stepper drivers, complete set 234 euro
 * http://www.element14.com/community/welcome parts used in the Ben Heck show on DIY CNC  http://www.youtube.com/watch?v=56YIwNz4QYM#t=280
 * http://www.emakershop.com/printed-flexible-beam-coupling beam couplers connects stepper to acme threaded rod.  Use steppers from http://probotix.com/
 * http://buildyourcnc.com/
 * http://www.wantmotor.com from  http://www.buildlog.net/forum/viewtopic.php?f=16&t=1769 major supplier of stepper motors
 * http://www.makeblock.cc/

http://www.dumpstercnc.com/couplers.html Linked to Cnc plans alfahobby describing the assembly of cnc rails.
 * http://www.planet-cnc.com/

Hobbymilling.com notes
http://hobbymilling.com/ DIY info, couplings etc ..

z-axis
http://www.cadcamcadcam.com/assemblyzaxisslide1-1.aspx preferred design, uses V slot bearings 

http://www.cncrouterparts.com/crp100-00-2-x-3-machine-plans-p-49.html v-ball bearing on single corner square tube

http://www.cncrouterparts.com/tips-and-tricks-for-pro-cnc-machine-construction-p-272.html Construction tutorial

http://www.cncrouterparts.com/tips-and-tricks-for-standard-cnc-machine-construction-p-189.html

pololu
http://www.pololu.com  Mounting hubs, shafts

Stepper drivers
http://www.hobbycnc.com/

cadcam
http://www.cadcamcadcam.com parts store

= links = http://reprap.org/wiki/Extruded_Aluminum

http://www.pdjinc.com/parts.html Nema 24 steppers $56