Budget

Name Detail Price Free? Notes

Air Hockey Table

40 Inch $34.74 Our table was “Used - Like New” from Amazon. Any air hockey table the same size should work with some adaptation of the gearbox mounting.

Stepper Motors

NEMA 23 1.26Nm $51.98 Any NEMA 23 size stepper motors should work here as long as they have a reasonable amount of torque.

Stepper Drivers

TB6600 $25.98 Any stepper drivers with sufficient current capability should work.

Arduino Uno

$27.60

Power Supply

24V 10A $22.99 We ended up switching to a bench power supply that only provided 18V, but this power supply is more compact and worked fine.
Gearbox Aluminum Shaft Stock ¼” x 12” 6061 $9.99
Gearbox MDF Stock 12" x 12" x ¼” $10
Gearbox Bearings FR6ZZ $8.99

Gearbox Spider Couplings

6.35mm $11.99 These get split in half and use to connect the 3D printed gears to the stepper motors. One half should be the same diameter as the stepper motor output shafts.
Gearbox 3D prints PETG $5.00

Arm Aluminum Stock

1/2" Shaft Diameter, 3/4" OD, 1/16" Thick $19.98

Arm Thrust Bearings

1/2" Shaft Diameter, 3/4" OD, 1/16" Thick $3.48

Arm Radial Bearings

FR8ZZ $9.49

Arm Joint Aluminum Stock

5/8" x 6” 6061 $2.27
Arm 3D Prints PLA $2.50

High Speed Webcam

640x400 210FPS Monochrome Camera $29.53 This camera worked very well for us - there are many similar options on Aliexpress with slightly different specifications. We mainly chose it due to the global shutter, high frame rate modes, and good price point.
Camera Mount Wood $5.00 We constructed our camera mount from scraps found in the Olin shop, but really any material should work here.
Camera Mount 3D Prints $1.75

Limit Switches

$1.66 We got these for free from previous PIE projects. Any limit switches should work if mounts are designed for them.

Electronics Enclosure Acrylic Stock

24”x18”x1/8” $17.85
Total $287.77