Replacement Parts
For those of you who purchased only the Wonderstructs plans or need to purchase a replacement part, here is information and links for samples of the non-wood parts.
Motor
1 motor. At least one side must be less than 27mm Speed must go from 0-45 RPM Torque 100 in-oz or better. Input voltage 9V. Output shaft must be square or rectangular, and have screwhole for mounting. Must have two wires for power.
Example: https://solarbotics.com/product/gm17/
Motor Speed Controller
1 Speed controller. Needs to be able to take 9V.
Example: https://amzn.to/2C87T2G
9-Volt DC Power Adapter
1 Power adapter.
Example: https://amzn.to/2PyZnf9
Pigtail Adapter
1 Pigtail adapter. This is used to connect the power supply to the speed controller.
Wire
3 meters of two-lead wire to carry power from the speed controller to the motor at the top of the conveyor.
Example: https://amzn.to/2LTKLoi
O-Rings
140 O-rings are needed for the conveyor.
0.07 inch width, 0.239 inch inner diamter, 0.379 inch outer diameter, hardness of Durometer 50A (Soft).
Example: https://www.mcmaster.com/#2418t116/=1eflwx4
Magnets
140 Neodymium magnets. N42 strength or greater. 8mm diameter, 3mm thickness.
Example: https://bit.ly/2PwJntN
Marbles
15 1-inch glass marbles
Example: https://www.moonmarble.com/p-794-game-boulder-asst-1.aspx
Adhesive Strips for Walls
Example: https://www.ontimesupplies.com/mmm1702448es-poster-strips-value-pack-white-48-pack.html
Metal Bearings
8mm inside diameter, 22mm outer diameter.
Example: https://amzn.to/2PZAM3S
Chimes
4 chimes are needed. Approximately 10mm in diameter. Chimes should have 2 small holes on end that a string can be threaded through.
Example: https://bit.ly/2NbO0vW
Stainless Steel Pins
4 pins are needed for the 4 switches
3mm diameter x 35mm length
Example: https://bit.ly/2ozuqvC
Springs
4 springs are needed for the 4 switches.
Wire diameter: 0.5mm. Coil diameter 6.4mm, coil height 5.4mm.
Example: http://www.centuryspring.com/compression-spring-10269.html
We also found that the spring from a ball point pen will work, but you may have to trim the length.
Screws, Washers, and Nuts
2 screws for motor mount, m1.8 x 0.35 x 25mm long
2 screws to motor mount to the back panel: m1.8 x 0.35 x 10mm long
4 nuts to hold the screws in place: m1.8 x 0.35
4 washers: 8mm OD x 2mm ID x 1mm thickness"
1 screw to hold the gear on the motor: Plastic thread-forming screw, 2mm x 12mm long, phillips head