Speed Test, Dirty Wheel, Laser Flaps

Mark has been working away, and we’ve been able to troubleshoot some of the action on the Solari displays. When I went to visit him at the Spikenzie Labs workshop, the first thing he showed me was a speed test. The Arduino system is able to control the flapping speeds as well as which numeral/letter comes up. Actually, it controls the millisecond delay between the turning of the flaps. We have a lot of play with how fast it will be able to go. In this video, Mark tries three flapping speeds—one slower, one standard speed, and one fast. We could go faster or slower, but if it goes too much slower it could fry the motor, and if it goes too much faster it could overheat! Some of these other home-made models are faster paced than the standard Solari board, but the artist we work with will need to determine how fast they want it to go.

Next, I had brought over a different unit so we could test it out with the system Mark’s been working on to make sure there wasn’t a difference between the units. We hooked it up to the board, and it seemed to be glitching—when we set it to flip incrementally one by one, it was working fine, but trying to skip from the neutral position to a further ahead letter, it was falling short. We tried from a few different angles, but nothing was seeming to work. Finally, Mark had an idea—that the wheel was dirty! The wheel knows how to display the numbers based on the differential between the metal plates and the fiberboard wheel. It was falling short because it was registering the dirt on the metal plates as the fiberboard. He gave it a scrub with some rubbing alcohol and set it straight.

We’re also missing two flaps (Which from 8 sets of 40 flaps per machine is a pretty good rate!), and I’ve been working on replacing them. Matt had found a black plastic folder in the school bookstore which is about the same weight and colour as the flaps in the machine. We were worried at first that it would be too glossy (the flaps themselves are smooth and matte) but after holding them up next to each other, the match is pretty convincing.

We wanted to try laser cutting them so we can have a few back-ups, or so the artist we work with could potentially play around with different signage by replacing the flaps, if they wanted to. I did a burn test on the plastic, which makers will know is essential for laser cutters—if the flame is green, the plastic has chlorine present, which releases a gas. Not only is the gas toxic to the people laser cutting, it also has a damaging effect on the machinery itself. Blissfully, the flame was orange and not green! We carefully measured the dimensions of one of the existing flaps, and then I mocked it up in Adobe Illustrator. We sent the AI file to the laser cutter. After a few tries (the first ones were too slow, and melted the plastic) we came up with a clean, beautiful, laser-cut flap. This is totally exciting! Next, we’ll start work with a screen printer to print the missing letters on them.