HAND-CRANKED US COIN SORTER

Parts:
- chute.stl          Main sorter ramp with progressive slots
- hopper.stl         Coin loading hopper
- feeder_wheel.stl   Crank-driven six-paddle feeder
- shaft.stl          8 mm axle
- crank.stl          Hand crank
- bin_base.stl       Six output compartments
- support.stl        Simple support/stand block
- coin_sorter_assembly.scad  OpenSCAD assembly and source

Sorting order, smallest to largest:
1. Dime
2. Penny
3. Nickel
4. Quarter
5. Dollar coin
6. Half-dollar

Suggested print settings:
- 0.20 mm layer height
- 3 walls/perimeters
- 20-30% infill
- PLA or PETG
- No supports for the main parts
- Print one of each part; print 2-4 supports depending on your frame

IMPORTANT:
The slot clearances are starting dimensions. Coin wear, printer calibration,
and filament shrinkage can affect fit. If a coin catches, increase the slot
width by 0.2-0.4 mm in the OpenSCAD source and re-export that part.

Assembly concept:
The chute slopes downward. Load coins into the hopper, turn the crank, and
the feeder wheel moves coins onto the chute. Each coin drops through the first
slot large enough for its diameter and lands in the matching compartment.