The Design & Specifications

Design Criteria

  • Clear, easy to follow design
  • Comprehensive construction and operation manual
  • A "Desktop" size form factor with letter size (8"x10") table/workspace
  • Provide several project entry points: plans; kits; completed product
  • Be built from either purchased or recycled (scavenged) materials and components
  • Be budget-sensitive and cost-effective
  • Operate with the majority of the commonly-available CNC apps
  • Drive bipolar stepper motors (less expensive, more common, better torque)
  • Buildable with minimal electronic or construction skills
  • Configurable to accommodate a range of spindle options
  • Configurable to accommodate milling, cutting, engraving, laser etching


Machine Specifications

  • Footprint: 10" x 18"
  • Max Length: 19 1/4" (will vary with motor choice)
  • Max Width: 12 1/4" (will vary with motor choice)
  • Overall Height: 15 3/4"
  • Clearance mill to table: 3 5/8" (approx., will vary with bit choice)
  • Table Dimensions: 8 1/2" x 11"
  • Drive Mechanism: Threaded Rod
  • Motors; 12V Bipolar Stepper Motors
  • Axes Travel: X = 10"; Y = 8"; Z = 3 5/8"
  • Resolution per step: 1/1000 inch

Electronic Specifications

  • Simple 3-chip design
  • Drives bipolar stepper motors up to 24V
  • Designed for standard enable/direction/step signal protocol
  • Simple modular board-per-motor design
  • Inexpensive, easy to source components for scratch builders
  • Simple screw-down terminal connectors
  • Designed to use standard PC Power Supply
  • Includes spindle on/off control and limit switches control
  • Uses PC parallel port (USB version in development)

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