Enclosures and housings
Havocharpa Bass Tagelharpa Assembly
- Bounding box
- 245.0 × 87.5 × 1200.0 mm
- Engine
- Precision B-rep
- Parameters
- 39
- Published
- August 7, 2026
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The prompt
Create a CNC-ready CAD model of a Havocharpa bass tagelharpa. The model must be an assembly of four separate wooden components: 1. Main carved body/neck/headstock assembly (single continuous piece) 2. Tailpiece 3. Bridge 4. Nut Do not model the body as separate soundboard, back, or rib components. MAIN BODY/NECK/HEADSTOCK: Create one continuous carved wooden solid containing the resonator body, curved neck, and headstock. Body: * Long vertical resonator shape. * Straight parallel sides through the upper and middle section. * Gradual taper toward the tail. * Symmetrical around centreline. * Approximate dimensions: 850–950 mm body length, 230–260 mm maximum width, 75–100 mm depth. Rear cavity: * Hollow the body from the rear as a subtractive CNC feature. * Maintain structural wall thickness. * Front plate thickness 4–6 mm. * Side walls 12–18 mm. Neck: * Integrated into the body, not attached. * Starts wide at the body joint. * Gradually narrows. * Curves inward toward the centreline. * Reverses into an outward curve. * Ends in a pointed return matching the body-side width before immediately tapering into the headstock. Headstock: * Continuous with the neck. * Contains three bass tuner holes. * Three tuner positions aligned along the headstock. * Hole size based on tuner hardware. Tail: * Machine a trapezium-shaped recess directly into the tail of the body. * Wide outer opening, narrower inner section. * Used as a glued anchor point for the tailgut. * CNC-accessible flat glue surfaces. SEPARATE COMPONENTS: Tailpiece: * Wooden removable part. * 120–150 mm long. * 40–50 mm wide. * Tailgut hole and three string attachment points. Bridge: * Wooden removable part. * Three string slots. * Curved feet matching soundboard surface. Nut: * Wooden removable part. * Three string grooves. OUTPUT: Generate closed watertight STEP solids suitable for CNC machining: * Main_Body_Neck_Headstock.step * Tailpiece.step * Bridge.step * Nut.step Prioritise manufacturable geometry over visual rendering.
Parameters
| Name | Value | Range |
|---|---|---|
| Body length | 900 mm | 800 – 1000 |
| Body width max | 245 mm | 200 – 300 |
| Body width at tail | 150 mm | 100 – 200 |
| Body depth | 87.5 mm | 60 – 120 |
| Lower taper height | 150 mm | 80 – 250 |
| Upper taper height | 100 mm | 50 – 200 |
| Side wall thickness | 15 mm | 10 – 25 |
| End wall thickness | 15 mm | 10 – 25 |
| Front plate thickness | 5 mm | 3 – 10 |
| Tail recess length | 40 mm | 20 – 80 |
| Tail recess outer width | 50 mm | 30 – 80 |
| Tail recess inner width | 35 mm | 20 – 60 |
| Tail recess depth | 10 mm | 5 – 20 |
| Neck length | 200 mm | 100 – 300 |
| Neck width | 40 mm | 25 – 60 |
| Headstock length | 100 mm | 60 – 150 |
| Headstock width | 60 mm | 40 – 80 |
| Tuner hole diameter | 10 mm | 6 – 15 |
| Tuner hole spacing | 25 mm | 15 – 40 |
| Number of tuner holes | 3 | 2 – 4 |
| Tailpiece length | 140 mm | 100 – 200 |
| Tailpiece width | 45 mm | 30 – 60 |
| Tailpiece thickness | 8 mm | 4 – 15 |
| Tailgut hole diameter | 4 mm | 2 – 8 |
| String attach hole diameter | 3 mm | 1 – 5 |
| String hole spacing | 12 mm | 8 – 20 |
| Bridge length | 60 mm | 40 – 100 |
| Bridge width | 30 mm | 20 – 50 |
| Bridge height | 12 mm | 5 – 20 |
| Number of bridge slots | 3 | 2 – 4 |
| Bridge slot depth | 3 mm | 1 – 6 |
| Bridge slot lateral spacing | 20 mm | 10 – 40 |
| Bridge height fraction | 0.65 | 0.4 – 0.8 |
| Nut length | 25 mm | 15 – 40 |
| Nut width | 8 mm | 4 – 15 |
| Nut height | 6 mm | 3 – 12 |
| Number of nut slots | 3 | 2 – 4 |
| Nut slot depth | 2 mm | 1 – 4 |
| Nut slot lateral spacing | 8 mm | 5 – 15 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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