SparkFun will be closed Monday 7/4/2022 for the 4th of July holiday. Orders placed after 2 pm MT on Friday 7/1/2022 will be processed on Tuesday 7/6/2022. SparkFun Support will also resume on Tuesday 7/6/2022. Have a safe holiday!
Let me explain to you how I built my latest art piece, Kinetic Column.Favorited Favorite 0
I had this weird project idea living in my brain since the beginning of the pandemic. My background in electrical engineering and art has helped me venture into the field of kinetic sculpture. In this article I will describe how I designed and built Kinetic Column.
Kinetic Column is my modern take on an iconic, historical relic. It's completely built out of neon acrylic sheets. The transparency and bright colors contrast the white stone columns we traditionally know. The top platform is meant to resemble the turning pedestals you would see in home shopping TV shows. An amphora vase cut and etched on iridescent acrylic serves as the topper.
I’ve always been inspired by the intersection of art and engineering, and lately I’ve had a couple of opportunities to help local artists bring movement to their sculptures. This kind of work in kinetics really sparked my interest and I created my first piece, Nature Mobile, last year. I used that project as an experiment with using the laser cutter and, what is now probably one of my most favorite mediums, neon acrylic.
My original idea for this piece was a bit more complicated than what I ended up with (or so I thought). Originally, I wanted to contrast the classical with the modern, plaster with plastic, neutral with color. I was inspired by this weird column pedestal that’s lived in my parent’s home for as long as I can remember and never served any purpose.
At first, I wanted to cut a similar plaster pedestal in parts and replace the middle section with an acrylic mosaic cube. That cube would rotate around its center and embedded LEDs would essentially turn the middle section into a colorful disco ball. Again, an ulterior motive of creating this art piece was to learn some new skills like laser etching, 3D printing, workshop skills, etc. The sketchbook excerpts below show the evolution of my idea. Some changes were based on feasibility, cost of material, and construction know-how. I finally landed on a rectangular pedestal design of all neon acrylic and a turning top-plate.
I wanted to build this column out of neon acrylic because of its special luminescent properties. This material lights up all on its own, especially at its edges. When natural light passes through a piece of colored acrylic, the shadows it casts takes on the color of the plastic and makes for a really interesting effect. I bought all my acrylic sheets, including the clear rod for wires and the iridescent sheet, online from Delvie’s plastics. To save some time at the laser cutter, I’d recommended getting what you can cut to size from your supplier.
These are the materials needed for sculpture construction:
These are the materials needed for the electrical system:
Since this is a laser-cutter-heavy project, before I could get to building I had to get my laser cuts drawn up in Adobe Illustrator. Even though most of the column parts are just rectangles, I really had a hard time visualizing how all the pieces fit together in 3D, hence all the scribbled calculations and drawings done old-school by pen on paper. In hindsight, I should have drawn up a model on the computer right at the beginning, but I don’t really know how to do that. I basically lived by the “measure 10 times, cut once” philosophy to make sure my laser cuts came out right. Some of my favorite laser cut files are pictured below, but all my files live on this github repo.
Because I had no scale rendering of what my column would look like put together, I made a scale model prototype. This was constructed out of scrap cardboard and wood. It was at this point I realized that the proportion of the size of the top platform to the bottom “foot” was way off so I decided to double up on the “feet”.
With acrylic in hand, I was eager to build. But first, the cut pieces needed to be prepared by finishing the edges with some sandpaper and cleaning with isopropyl and a microfiber cloth. Pro-tip: wear gloves when handling unwrapped acrylic to avoid too many neon fingerprints.
After all the acrylic was cut and prepped, it was time to get started with assembly. This was pretty much a four-hand job, so my friend and mentor Trey Duvall helped me with the construction. The order of assembly is depicted in the images below. Essentially we first welded on the ornamental pieces that go on the outside, the scroll swirls and blue flutes. Then built the trunk of the column including the interior supports and the tube. And then the two box feet were constructed as well as the scrolls welded onto the top plate. 1-2-3 blocks, clamps, and what we called “human clamps” (hands) were really instrumental in making the joints. This material is especially luminescent at the edges, it is important that the acrylic comes together at a nice seam. Also, due to the see-through properties of this type of acrylic, to-scale paper templates also came in handy to position or mark acrylic.
To join two pieces of acrylic together, the main method is using Weld-on which is a solvent that literally fuses together the plastic at a joint. It can be a pretty finicky material, especially if you’re working with stuff that is clear. Air bubbles and even wiped up drips are guaranteed to show up on your acrylic surface so it’s really important to practice your hand with the applicator bottle.
After all the 90° edges were welded together I had to tackle bending the acrylic top plate. The industrial standard for bending acrylic is using a professional line bender so we tried setting up a strip heater. Other than the setup being pretty sketchy, the strip heater did not get hot enough to bend the acrylic quick enough, so we changed plans.
Using a hot air gun and a counter weight really made the bending process really quick and clean. This is a very involved process that definitely requires at least four hands, so Trey helped me with this as well.
Throughout this build, I kept on asking myself what this pedestal would display, if anything at all. I was definitely inspired by ancient Greek relics and I eventually decided a classical vase would be the perfect topper and give me a chance to try out some etching.
I learned so much about using the Epilog Engraver here at SFHQ while drawing and creating this vase. For etching the Epilog engraver looks for a black fill with no line in your Illustrator file. I used my iPad and Apple pencil to draw the vase scenes. I made the mistake of drawing the prototype etches using Illustrator’s Paintbrush Tool. That tool creates lines with anchor points, a given stroke, and thickness. To draw a custom engraving pattern I found the Blob Brush Tool worked for me which essentially creates vector shapes with both a stroke and fill.
To create a cut, the Illustrator file you’re printing from needs a black line, no fill, and 0.001 stroke. I tried out different vector settings as well. The defaults outlined in the Epilog handbook usually require the cut to be done twice to get all the way through the thickness of the acrylic. This sometimes leads to non-perpendicular and wavy cuts. By slowing down the cutting speed, one cut can make it through the acrylic but the dimensions are less exact because the laser takes out a wider path out of the acrylic.
The last part of the build process was putting all the pieces together and installing the circuitry. I was pretty confident in my electrical system design because I had used similar systems on projects in the past. Below is my circuit diagram and physical circuitry. Most of the connections are soldered and shrink-tubed and the boards hot-glued into place. The code used to turn the motor can be found on my github repo and the parts list is linked in the “Materials” section.
The last game I like to play in the integration phase is “where’s the squeak coming from?” Once the whole column was assembled and turning, there was a horrendous squeaking sound, acrylic scratching on acrylic. I determined it was coming from the acrylic rod scratching on a hole. Though it’s still not perfect, a little bit of filing and WD-40 helped bring down some of the noise. Easy, peasy, kinetic column!
Building the Kinetic Column has taught me a lot of things. When I work with this neon acrylic material again I will be sure to remain patient, calm, and give myself enough time to build and install. This material is so beautiful and mesmerizing but it can be really fragile and hard to work with. In my experience, there’s a lot that can fail when designing a kinetic sculpture so it is wise to mitigate stress and panic by remaining calm when issues arise.
Since I don’t have a formal art education, another thing that I wasn’t expecting was the additive color effect of all this transparent plastic. The finished product came out more orange than I realized it would.
I also considered adding extra features. I ultimately decided against addressable LEDs because they would detract from the inherent luminescent nature of this material. The addition of the ivy leaves was also polarizing. I decided to keep them because they break up the transparent material a bit and I find them kind of ironic as something that’s inorganic posing as organic, as well as ivy vines being often associated with greek columns.
Lastly, this project is one of a few of my efforts to create open source art inspired by my work here at SparkFun. I am incredibly inspired by the sharing of information to recreate or expand upon projects. I think this makes the exclusive fields of creating art, designing tech, or writing code more accessible to a range of people that would not normally think to explore those realms.