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)
   • Source: Thingiverse
   • Attribution: Mayavan
   • License: Creative Commons - Attribution license.
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
    • Source: based on the Yet Another Parametric Projectbox Box (YAPP).

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