Tumble cleaner

Tumble cleaner
Can be used for polishing, agitating etc.

-- Update:--
Included is a cad file to create your own tracks for different sized tins.
Open with OpenScad and enter the circumference of your tin.

Parts
500gm coffee tin
Length of ~2mm thick wire
Scrap wood ~200 x 300mm
360° degrees / continuous servo motor
Servo disk (EG https://www.aliexpress.com/item/1005009224057576.html)
Servo motor tester
5V power supply (Usb, batteries, plugpack, etc)
3 x M8 - 40 Bolt
3 x M8 Lock nuts
4 x M3 - 6 screw
6 x M3 – 20 Screw
6 x M3 nut
10 wood screws

Print:
6 x tin track
3 x free gear
3 x free bracket
1 x motor gear
2 x motor bracket
1 x drill guide

Assembly
Attach the drill guide to the wood and drill small pilot holes for the wood screws
Insert the motor into the brackets and use wood screws to fasten the stands and brackets to wood backing.
Attach the motor wheel to the servo disc with M3-6 screws, then to the servo.
Fasten the free wheels with M8-40 bolts and lock nuts. Align wheels on the same track in the same direction.
Use the M3-20 screws and M3 nuts to attach the tacks to the tin. Orientate tracks to mesh with the motor and wheels. The spacing between adjacent tracks can be adjusted a little by tightening and loosening the M3-20 screws. If need be use foam tape between the tin and the tracks to pad things out.
Wind the wire around a rod or dowel. Stretch the wound wire out to look like a spring. Insert the spring into the tin, coiling it around the inside walls.
Connect the motor to the servo tester, then connect the tester to a power source.

Too use
Place media into tin
Close tin
Place tin on tracks
Run the motor pulling down on the tin. IE the motor in the configuration shown rotates clockwise when looking at the screws in the gear.