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Claw-Machine-Mechanicals

Mechanical components, docs, and CAD for the UofC GNCTR 2024 claw machine game

Bill of Materials - Bought

  1. 4x 8mm Smooth Rails (650mm long)

  2. 4x 8mm Linear Bearings (LM8UU)

    • Outside Diameter: 15mm
    • Length: 24mm
    • Similar Purchase Link with dimensions

  3. 1x 12V Geared DC Motor with Encoder

    • 12V, 280 RPM
    • Purchase Link
    • OD of Gearbox: 24.6mm
    • Length of Motor and Gearbox: 58.2mm
    • Length of Gearbox: 19mm
    • Distance between M3 screw holes: 17mm
    • OD of Shaft: 4mm
    • Shaft Flat Part, from OD to key: 3.2mm
    • Shaft Length, excluding collar: 8mm
    • Shaft Collar Length: 3mm

  4. 1x 12V Worm-Geared DC Motor with Encoder

    • 12V, 100 RPM
    • Purchase Link
    • M3 threads on case
      • 18mm x 33mm pattern
    • Main Gearbox Dimensions: 32mm x 46mm x 23.5mm tall
    • Shaft OD: 6mm
    • Motor OD: 24mm (offset from gearbox height center)
    • Dist from Top Screws to Shaft (approx): 9mm

  5. 3x NEMA 17 Motors

  6. Claw

    • Comes with rope
    • 12V solenoid drive

  7. NEMA17 Bracket Mount

    • Purchase Link (wth drawing)
    • Distance from bolted plate to center of motor: 30mm
    • Dist between slots: 30mm
    • Length of slots: 34mm, minus screw holes
    • Motor screw diameter: M3
    • Slotted screw size: up to M4

Parts to Construct

  1. Pulley for Z-Axis Rope (idler_pulley.scad)
  2. Rail mounts to Top for X-Axis rails (x_ends.scad)
    • Also includes mount for the limit switchs
  3. Slider between X-Axis and Y-Axis (xy_slider.scad)
    • Motor mount on one side, idler on the other
    • Grip to X-Axit belt
    • Linear Bearing holders for X-Axis
    • Rail holders for Y-Axis rails
    • Limit Switch Mount
  4. Mount from Y-Axis linear bearings to the Z-Axis motor (y_axis_sled.scad)
  5. Idlers for X-Axis (x_end_idler.scad)
  6. Drag Chain (drag_chain_link.scad)
  7. X-Axis Motor Mount Raiser (x_motor_mount_raiser.scad)
  8. GT2 Belt Coupler (gt2_belt_coupler.stl)
  9. X Idler Mount (x_idler_mount.scad)
    • Raises the idlers up to the same height as the x-axis steppers
  10. Enclosure for PCB

Axis Definitions

  1. X-Axis = parallel to the side with two separated motors/linear rails
  2. Y-Axis = perpendicular to the side with two separated motors/linear rails (claw attaches to Y-Axis)
  3. Z-Axis = raise and lower