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
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?
- Misc
- Dust collection setup?
- Vacuum hold-downs? (optional)
Clean up cast parts