Brackets and mounts
HavocHarpa 3-String Bass Tagelharpa
- Bounding box
- 1152.3 × 876.0 × 77.0 mm
- Engine
- Precision B-rep
- Parameters
- 34
- Published
- August 7, 2026
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The prompt
Design a 3D CAD assembly of a 3-string Bass Tagelharpa optimized for 3-axis CNC routing, featuring an open playing window frame, customized soundholes, and separate hardware/soundboard components based on the HavocHarpa reference. 1. Primary Silhouette & Aesthetics (From Reference Photo) Headstock / Top Crossbar: Flat-topped frame with top-mounted enclosed bass tuners. Includes an integrated horizontal nut bar across the top of the playing window. Playing Window & Frame: Vertical arms taper upward, with prominent chamfers along the inner and outer front edges for ergonomic left-hand playing access. Soundholes: Symmetrical stylized bow-cut soundholes (resembling stylized bow/sword forms) flanking the bridge instead of standard circular cutouts. Body Tail Profile: Tapers inward at the bottom corners with a flattened base, featuring a bottom endpin/tailpiece anchoring slot. Tailpiece: Sculpted hardwood tailpiece with custom tapered geometry and dual drill holes for paracord tailgut loop attachment. 2. Primary Dimensions Overall Length: 876 mm Scale Length (Nut to Bridge): 546 mm Body Depth: 69 mm Lower Body Width: 208.5 mm Playing Window Length: 293 mm Playing Window Width: 108 mm Headstock Width: 158 mm (spaced for 3 top-mounted bass tuners, 36 mm peg spacing) 3. Internal Cavity & Machining Rules (CNC Body Shell) Perimeter Wall Thickness: 7 mm along sides. Tailpiece Anchor Block: 18 mm solid block at the base for tailgut anchoring. Window Frame & Arms: Solid continuous timber extending into the body shell. Soundboard Ledge (Rebate): 3.0 mm deep x 4.0 mm wide step-route around the internal body cavity perimeter to flush-mount the soundboard. Corner Fillets: Internal cavity transitions filleted to 6.35 mm (1/4" endmill clearance). 4. Sub-Components (Separate CAD Bodies) Soundboard (Top Plate): Thickness: 3.0 mm flat plate matching body outer contour. Soundholes: Dual mirrored stylized vertical cutouts (see reference shape). Underside Bass Bar: 8 mm wide × 10 mm high spruce bar running parallel under the middle/bass string foot area. Bridge: Width: 69.5 mm | String Spacing: 22.7 mm Geometry: Low-profile curved top arc with thick, wide-stance feet. Tailpiece: Contoured profile tapering at top and bottom. Holes: 2× 4.5 mm clearance holes for paracord loop. Nut Bar: Slotted guide bar integrated across the window top. 5. Output Formats Required 3D Assembly: STEP / IGES (Body shell, Soundboard, Bridge, Tailpiece modeled as distinct bodies). 2D Production Vectors: DXF files for 3-axis top-down pocketing/profiling and laser-engraving alignment vectors.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall length | 876 mm | 500 – 1200 |
| Max body width | 208.5 mm | 150 – 400 |
| Body depth | 69 mm | 50 – 100 |
| Playing window height | 293 mm | 200 – 500 |
| Window inner width | 108 mm | 80 – 200 |
| Headstock outer width | 158 mm | 120 – 220 |
| Headstock bar height | 20 mm | 10 – 40 |
| Arm chamfer size | 5 mm | 0 – 12 |
| Cavity wall thickness | 7 mm | 5 – 15 |
| Tailblock thickness | 18 mm | 10 – 30 |
| Soundboard thickness | 3 mm | 2 – 6 |
| Soundhole blade length | 120 mm | 60 – 200 |
| Soundhole blade width | 20 mm | 10 – 40 |
| Soundhole guard width | 40 mm | 20 – 70 |
| Guard offset from center | 10 mm | 0 – 30 |
| Soundhole vertical position | 300 mm | 150 – 500 |
| Bass bar width | 8 mm | 4 – 16 |
| Bass bar height | 10 mm | 5 – 20 |
| Bass bar X offset | -30 mm | -60 – 0 |
| Bass bar length | 150 mm | 80 – 300 |
| Bridge width | 69.5 mm | 40 – 100 |
| Bridge length (depth) | 15 mm | 8 – 25 |
| Bridge height | 8 mm | 4 – 16 |
| Scale length (nut to bridge) | 546 mm | 400 – 900 |
| Tailpiece length | 98 mm | 60 – 150 |
| Tailpiece top width | 68 mm | 40 – 100 |
| Tailpiece bottom width | 48 mm | 30 – 80 |
| Tailpiece thickness | 6 mm | 3 – 12 |
| Tailpiece hole dia | 4.5 mm | 2 – 8 |
| Nut bar thickness | 8 mm | 4 – 16 |
| Nut bar height | 10 mm | 5 – 20 |
| Bottom end width | 150 mm | 100 – 250 |
| Internal fillet radius | 6.35 mm | 0 – 12 |
| Exploded gap | 40 mm | 10 – 100 |
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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