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Local Love

My hometown has a thriving art community. Sadly, while I cannot say I'm really engaged with it, it makes me very happy that it exists.

Recently, as a community-building project, local artist, Denise Girardin launched "Love 01760".

This 3D printing "thing" doesn't quite fit the theme of having people create half hearts to be joined together and displayed, but it's what came into my head when I heard about the town's art project. It seemed like this could be hung on the inside of the glass panel of our front door, to at least show support for the project.

Most of the 3D projects at this site are primarily done using OpenSCAD, but I'm also a big fan of Inkscape. This project turned out to be a very nice opportunity to blend the use of both tools.

The Design

The project went through several iterations. That's normal. A circle design was actually the second try because I was not happy with how the first attempt at a heart looked. It was giving me grief getting the inner heart cut out from the outer. I was eager to push forward with the concept, so I switched to a circle. It is very easy in Inkscape to make two circles and delete the smaller one from the outer to make a ring. I don't even think I kept the file for the first heart effort.

The text tool in Inkscape allows quick adjustment of the distance between letters, which is called "kerning". It should be obvious that the letters and digits need to connect to the outer ring and also to one another so that the whole design works. The text characters of "LOVE" or "01760" cannot just be separate, or the 3D version won't hold together. To move the characters so they overlap needs negative kern value. In typical fashion, trial-and-error got the job done.

lovecircle.png love01760-circle2.png

Making the heart begins with a balanced set of points which just barely look like a heart, maybe a robotic one. Making it rounded involves using the node control to turn all but the two middle points/nodes into smooth nodes. Then fill the heart (I chose black), duplicate the heart and reduce it evenly and finally fiddle with the node until you get the heart "right".

editpathbynode.png selectednodes.png

heartgrid.png heartgrid2.png heartgrid3.png heartgrid4.png heartgrid5.png

Eventually, a version of the heart was satisfactory. Then came the loop at the top to make it easy to hang. Finally, add the text with all the kerning and positioning fiddle needed. Ultimately, I liked the wave across the middle, but you can (and should) experiment as you wish.

addthetext.png lovedesignwave.png

Switching to OpenSCAD

Make sure you convert your text into paths. If you forget, you will fail to get a good export to OpenSCAD.

One of the great things about FLOSS/FOSS/open source software is the potential for effective interaction among several programs. Nothing is secret or locked down. Scalable Vector Graphics (SVG) is the standard file storage of Inkscape, Converting the paths of SVG into polygons for OpenSCAD was a challenge taken on by programmer Dan Newman. He developed an extension for Inkscape. I love the results, and have used the extension in many projects. Then we easily also make an STL file for a 3D printer. Programs and programmers working together, just like the residents of my fantastic town.

openscadextension.png

After importing the Inkscape-generated scad file into OpenSCAD, all we have to do is perform a full render followed by an export of the STL file for the printer. Once there, it's just a short 20 minutes or so for a print of the basic size. Of course it is easy to adjust the size, either in OpenSCAD or using your preferred slicer software, or even to do a dozen at a time (a bit over an hour).

cura.png curalg.png curaxlg.png cura12.png

An appropriate length of filament fishing line strung through the top, et voila, something to hang in a window to catch the light.

Available Files:

(In most browsers, right click each file you wish to download and select "save-as" from the menu options.)

SCAD files for study/modification and STL files for quick prints

The SCAD and STL files typically published are going to be useful only to local residents.
However, it may be helpful to look at an Inkscape design file with each of the stages I went through.
You'll still need to fiddle with adding your choice of zip code.

loveheart-dev4.svg - a file to help you as a beginning for your own design.
----- For my lovely local community -----
loveheart5.scad - basic single small print as generated by the Inkscape extension
loveheart5.stl - ready for a basic print with your printer or ask at the Morse Institute library
loveheart5-12.stl - a printer full of 12 hearts
GPL3 License