Customizable Moravian Star illuminated

thingiverse

This illuminated Moravian Star is a lamp for christmas decoration. it is printable in 2 Versions: Version A: hanging star with 1 body base (optional upper and lower half), 1 cover cap, 17 square points, 8 triangular points lluminated by bulb 6V / 0.3A or optional LED equipment Version B: standing star with 1 body base (optional upper and lower half),1 candle adapter, 1 cover cap, 17 square points, 8 triangular points illuminated by electric candle or candle chain For easy mounting a mounter is attached. I made one of version B with a IR controlled candle. The IR signal penetrated through the (yellow) plastic to the IR sensor of the candle. The geometry of the star depends on 2 parameters: diameter_star diameter_illumination. To meet the original shape the ratio of diameter_star / diameter_illumination is 130/12.6 Increasing the diameter_illumination and keeping the diameter_star will result in a bigger body base and shorter points, which normally is no problem. Print Settings Rafts: Yes Supports: Doesn't Matter Resolution: 0.2 mm Infill: 25% except points (0%, 1 perimeter, no bottom) Notes: Before printing: it is a good idea to print the body base at first. For a good fitting of the cover cap and candle adapter it could be necessary to play with the radius_correction parameter in the scad file. If you want to print Version B After that you can find out the length of candle adapter by inserting the candle and measure the length. Material: ABS preferred Points: infill = 0%, 1 perimeter, no bottom extrusion width should be 0.5 to 0.55 mm for a good sticking between layers, but no very much more, because translucency would be poor. Also print wit low speed (20 mm/s) to avoid the "ringing" effect Raft is recommended to avoid 1st layer to be too thick - and for better build plate adhesion. Important: Dont print a single point! The tip will be distorted. Printing more points - or the complete set - will give you better results and save time! (compare, what printing times your slicer calculates) Other parts: Infill = 25%, normal speed, perimeter, top and bottom as you want. no support needed. Post-Printing After printing the parts they have to be glued together (plastic glue) start with 8 squared points on the equator wait some time until the glue has become hard mount the squared and triangular points to the southern hemisphere and the pole wait some time until the glue has become hard mount the squared and triangular points to the northern hemisphere wait some time until the glue has become hard Do not glue the cover cap to the star, otherwise you would not be able to change a defect bulb. The candle adapter can be glued to the star, because the whole construction is removable from the candle. If you intend to make a 2-color star, please look at the cover picture twice :=) How I Designed This This summer I visited the German town Herrnhut and the factory, where the Moravian Stars (Herrnhuter Sterne) are produced in different sizes. I was fascinated how nice the stars look in a decoration. I wanted to take a 2 colored star (13 cm) for my friend in the colors of his favorite football team, but unfortunately this was not available. So - what does the owner of a 3D printer do - you guess it. Otherwise you can buy the stars in many colors at www.herrnhuter.de. Printing all parts of a star takes about 5 hours - but a good opportunity to tune your printer.