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CNC template · Technology and experiments
Water wheel with slot-in paddles
Water wheel for a stream, gutter or tap: two wheel discs with slots, slotted paddles and a tenoned stand. Number of paddles, diameter and width adjustable.
- Size
- 328 × 374 mm, 6 mm thick
- Material
- Plywood
- Difficulty
- Intermediate
- Milling time
- approx. 32 min
- Bits
- End mill Ø 3.175 mm
- Customise
- Size, text and details adjustable with sliders
- With a laser
- diode laser from about 10 W (cuts 6 mm)
Try it without an account · carve with Chrome or Edge · no installation
Build instructions
Materials and accessories
| Qty | Part |
|---|---|
| 1 | Beech dowel rod 8 mm |
| 1 | Wood glue (water-resistant D3) |
| 1 | Wood oil, wax or clear varnish |
Also: sandpaper (grit 120 and 240), a utility knife or fine saw and, for joints, a rubber mallet.
Carving and finishing
- Clamp the workpiece flat on the spoilboard or secure it with double-sided tape, and set the origin as shown in the carving assistant.
- Mill slots and axle holes, then cut out wheel discs, paddles, base and uprights.
- Free the parts at the holding tabs with a utility knife or fine saw and sand the tab remains flush.
- Before gluing, dry-fit everything. If a joint is too tight, increase the clearance by 0.05 mm and carve the part again; if it wobbles, reduce it.
Assembly and final touches
- Insert the paddles with their tenons into the slots of both wheel discs and glue with waterproof glue. Push the dowel tightly through the centre holes.
- Glue the uprights into the base and mount the wheel between them. For outdoor use paint everything with boat varnish.
- Put it under a water jet: how fast does it turn when the water hits at the top (overshot) or at the bottom (undershot)?
How to carve this template
- OpenOpen the template in the app and adjust size and text if you like.
- CheckLook at it in 3D, check run time and warnings.
- Set upThe carve wizard guides you through material, clamping, bit and zero point.
- CarvePress start; the app drives your Grbl router directly over USB.
