Aka, "Son of Junior"

The intention is to build much bigger CNC router than we currently have.

Effective table area of approximately 40" x 40" (probably a little less due to spindle width, etc.), Z-axis travel of about 4-5"?

Current Status: Some parts have been built, courtesy of Steve Gray. Parts should arrive at the space at the end of December 2018. Assembly to occur beginning in early 2019.

X-axis: 1/2" supported rails with cast blocks. Leadscrew motion.

Y-axis:  1/2" supported rails with cast blocks. Twin Leadscrew motion.

Z-axis: 1/2" supported rails with cast blocks. Leadscrew motion.

Spindle: Makita or Grizzly laminate trimmer router. (measure diameter of Grizzly router to see if it will fit)

Frame: Welded square steel tubing? Wooden torsion box? Aluminum extrusions are probably prohibitively expensive.

Dust collection: will be tied into our dust collection system.

Electronics:
  * Motors: NEMA 23
  * Motor Drivers: TB6600 Gecko lookalikes 
  * CNC electronics (grbl, BBB, etc.) - Current preferred mechanism is BeagleBone Black with Machinekit. A board for the BBB that splits out its pins to a pair of DB25 parallel ports has been purchased.

Project plan
  * X axis
    * what else needs to be done?
    * Turn down end of leadscrew
  * Y axis
    * Cut down rails to length if necessary?
    * attach rails to base
    * tap delrin nuts 
    * cut leadscrews to length?
    * turn down leadscrews
  * Z axis
    * <del>attach spindle mounts</del> 
    * attach to X axis
  * Table
    * figure out design
      * Torsion box
      * leveling casters?
    * Build the thing
  * Electronics
    * Wire up everything
    * Procure motors if needed?
  * Misc
    * Dust collection setup?
    * Vacuum hold-downs? (optional)
    * <del>Clean up cast parts</del>