Marine Instrument Cover
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Boats, particularly yachts have lots of instruments in the cockpit and each of them has a cover to help prevent the…
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- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution
Boats, particularly yachts have lots of instruments in the cockpit and each of them has a cover to help prevent the sun from crazing the instrument display. These sometimes get lost or broken, they can blow away in a gale or just go missing. If it is a relatively new instrument one can order a new cover. If it is older, covers can be very difficult to replace.
To get around this problem with two instruments I created a general-purpose design using Open-SCAD. It works with any square/rectangular instrument with rounded corners and curved sides and top/bottom.
To specify a cover, one opens the OpenSCAD script and fills in the rectangular size i.e. length and width at the corners. The length and width at the centre of the sides and between the top and bottom specifies the curvature of each. The radius of the corners may also be inserted. The thickness of the cover (1.6 mm is typical but it can be more or less). Finally, the height of the cover is given. This defines how much overlap the cover makes when it is placed on the instrument.
Print Settings
Printer Brand:
Creality
Printer:
Ender 5
Rafts:
No
Supports:
No
Resolution:
0.4 mm
Infill:
25%
Filament: Any PLA for temperate or PET-G To suit instrument
Notes:
-
When you open the thing in OpenSCAD or change any variable do not use Preview (F5) to see it, use Render (F6) instead. The maths of the formulae are slow on a laptop so this avoids long waits.
Always specify some curvature for sides and corners so trig formulae do not fail. Thus, the length and widths at mid-point should be at least 1 mm greater than at corners. The radius at the corners should be at least 0.5 mm.
If the corner radius is more than 2-3 mm, the model may show tiny spikes or wedges at the corners. This is corrected by tweaking i.e. by bringing in the top/bottom or sides by a small amount by giving the tweakw and/or tweakl variables a small negative number (say -1.5) until the model looks ok. This is a consequence of the trigonometry used in the calculations and the difficulty of getting the curves at the sides/ends to match the curves at the corners..
Category: Sport & Outdoors