CNC Training
--- Work in Progress ---
Goals of CNC training
CNC is all about processing gcode. The process is -
- Design
- Convert
- Cut
Design Options
- Inkscape
- TinkerCAD
- Sketchup
- AutoCAD
- Other CAD software
Convert
- gcodetools
- CAMBAM
- ???
Cut
- Mach3
- LinuxCNC
Using Mach3
- Pin/Port, motor, and GCODE configuration
- Jogging the machine
- Setting the home point
- Testing the cuts
- Changing the bits
- Dust collection
- Changing the speed
- Rewind/Reset
- The STOP button and limit switches
Preparing the machine
- NEVER move the motors manually while connected to control box - it can damage the electronics.
- Zero the spindle high above
- Test the gcode
- Zero the spindle for real
- Monitor the cut, adjusting speed as needed.
Preparing the workpiece
- double sided tape
- screws (and sanding smooth)
- clamps and dog holes?
- vacuum table would be cool
- dust control
- Leveling the table to the gantry
Common problems
- Run out
- Bad gcode
- Bad cuts - too fast, too dull, too deep
- wrong units (mm vs inches)
- wrong arc method (absolute vs relative)
- stuck limit switch
- cheap control box (prone to break or overheat?)
- watch out for obstructions (this also means screw and clamps)