User Tools

Site Tools


bigcnc

This is an old revision of the document!


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
    • attach rails to base
    • tap delrin nuts
    • cut leadscrews
    • turn down leadscrews
  • Z axis
    • attach spindle mounts
    • attach to X axis
  • Table
    • figure out design
      • Torsion box
      • leveling casters?
    • Build the thing
  • Electronics
    • Wire up everything
    • Procure motors if needed?
bigcnc.1547573123.txt.gz · Last modified: 2019/01/15 12:25 by sdh7

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki