posts tagged with the keyword ‘artrobots’

2014.10.20

Friday Night Drawbot v1

There haven’t been a lot of updates to my Friday Night Drawbot project lately, but things are picking up again.

Pictured above is version 1, which was built back in 2011, on a Friday night, in my basement. It drew circles. (And that’s it.)

Friday Night Drawbot v3

The programming got much better, and I ended up rebuilding the chassis a few times. This is what I like to call “version 3″ of the Friday Night Drawbot, and is still in use today.

FND

Let’s call this version 3.5. We’ve shed the old corrugated plastic in favor of a replacement designed digitally, and created with laser-cut wood.

The front plate that holds the pen can now easily slide forward and back, and is held in place by a pair of screws and wing nuts.

FND Drawing

I started the redesign process by taking apart the drawbot and measuring things with the calipers. I then used Inkscape to create (on multiple layers) the parts needed, which consists of the main plate, bottom plate, and pen extender plate.

FND Laser Cut

Here are the pieces separated out and ready to be laser-cut, or, cut in some fashion, I should say…

Old Plastic Body

I tore apart the old chassis which was hot glued to the servo motors, and held together with rubber bands. I had to heat things up to release the glue, so it’s a bit destroyed. No loss!

FND Paper Prototype

This is a paper prototype I created with the Silhouette Cameo, which does a fine job of cutting thick paper. I often prototype cutting things with the Silhouette because, well, it’s in my basement, so I always have access to it (unlike a laser cutter.) I could easily print on paper as well, but I find that with the cutter close by and easy to use, I use it a lot. It helps to have physical things cut and in front of you sometimes.

FND Bottom

Here’s the bottom view of the laser-cut version. There’s a lot of 8/32″ hardware holding things together, mainly because SAE is cheaper than Metric around these parts. (Drat!)

You can see that the two wing nuts hold the pen extender plate in place, so it’s easy to loosen the nuts and slide things around. (The slot could probably be a little narrower next time.)

There’s also some regular nuts holding the bottom plate to the main plate to hold the servos in place. The 3mm Baltic Birch flexes a bit though, and may not be the best solution.

Pen Holder (Bottom)

There’s a captive t-nut to hold the pen in place. It’s a good idea, but poorly executed here.

Pen Holder (Bottom)

The screw does hold the pen, but again, the 3mm wood is a little thin for this to work well. It’s also difficult to tighten and loosen the screw without a screwdriver. I really need a screw that allows you to use your fingers, like the one on the Egg-Bot. I’ll probably make a 3D printed screw-thingy for this.

Detour! I often wonder/worry about mixing laser-cut stuff with 3D printed stuff, and I’m not sure why. Maybe it’s due to the recent kit design work I’ve been doing where we try to make everything laser cut, mainly due to speed and efficiency of production. In this case though, I’d see the 3D printed screw-thingy as an “enhanced” piece, so it should be totally fine. Or I could, you know, use a wing nut. (End Detour!)

Pen Holder (Side)

As mentioned, I find the 3mm wood a bit thin. This whole design is really just 2 dimensional, or maybe 2.5 dimensional if you want to stretch things a bit. I want to have the next iteration be much more 3 dimensional. I may stay with laser-cut wood for most of it, but there is a lot to explore in the design for assembly aspect of things.

FND

I may play more with this version, introducing minor improvements, or just move on to the next revision, which will be much more box-like, and move away from the flat plates.

Since I like to build things really fast, it’s hard to know what will happen next.

2014.03.09

Delta Robots

Sometime in 2013 I stumbled upon the blog of Sarah Petkus titled Robotic Arts. Probably because, you know, I occasionally build art robots. Sarah is a member at SYN Shop, a nice looking hackerspace in Las Vegas, and she’s been working on building delta robots for a while now. She’s got a great post about the journey from using household junk to designing and printing 3D parts to build her robots. Check out Robot Army : From Tupperware to 3D Printing.

Junkbox (Delta-style!)

She also been collaborating with Mark Koch at SYN Shop and turned this whole delta bot thing into a Kickstarter (successful!) that is going to help fund an art performance with an army of delta robots. And hey, while they’re at it, they’ll also be turning their robot into a kit through ROBOT ARMY, a new venture to manufacture robot kits for the do-it-yourself market.

I started working on a delta robot last year because I’ve got a project planned that requires one, but I still haven’t finished it. I might consider getting a kit if it makes sense to speed up my process and get to the “art” part of a future art robot I’ve got planned.

2013.01.09

Here’s a video I put together to show how two of my art robots function. The video is playing right now in the gallery where some of the art is on display, as I mentioned previously.

Art Robot

Art Robot

You can do a lot with an Arduino, two servos, and a few other miscellaneous parts. ;)

2013.01.04

Arc-O-Matic

The Beaver Dam Area Arts Association invited me to take part in a show titled “Beyond Your Imagination” which opens January 6, 2013 and runs through February 10, 2013.

So, you know, between the holidays, work, traveling, and other projects, I had to scramble to get Friday Night Drawbot and the Arc-O-Matic up and running again, with new code, and new parts, and create some art… with the help of robots.

So, consider yourself invited to the Seippel Homestead and Center for the Arts, 1605 North Spring Street, Beaver Dam, Wisconsin to view the show. If all goes well I will be there Sunday, January 13, 2013 for a live demonstration of the art robots.

Friday Night Drawbot

tl;dr: See robot art I created. With robots.

Update! Here’s a video of the bots in action.

Update! Here’s a photo from the show opening, courtesy of Jason Gullickson.

BDAAA

2012.08.22

Art #002

In almost all programming languages there’s a function to generate a random number. The random number can then be used to choose a random word, color, shape, etc. In art things are often random, but in specific ways. When drawing, can you really make your hand “randomly” create a line? Isn’t your subconscious always having some effect on the outcome? Short of feeding electric pulses to your muscles to make your arm movements “truly” random, I’m not convinced. (And no, I’m not ready to send live current to my own arms!)

This idea of introducing randomness to the creation of art is something I’ve been doing for a while now. I didn’t really think about it too much, but now I am.

Art #002

The Drawbot I built in 2011 brings this idea of randomness into its operation. The patterns I programmed into it had certain criteria (turn left, go forward, turn left, go backward) but the randomness is in the amount of movement. I like this because even though a device that’s mechanical and electronic should be able to repeat the same thing over and over again (and is sometimes expected to) this doesn’t. It’s also assembled with parts that are nowhere near precision in their movement, which adds more randomness to it all.

The Arc-O-Matic follows a similar concept. The current programming forces it to stick to a preset path (drawing arcs) with no randomness introduced into the code, but again, because of the lack of precision parts swinging around an arm with a pen on it, even when it tries to draw the exact same path, there are variations that cause them to be different each time.

Art #003

Besides the art robots that typically just draw an image, I’ve been experimenting with introducing randomness into the generation of other art, which is starting digital, and will eventually be part of the analog world. I’ve also got a few ideas for interactive digital pieces that will rely on input from the physical world, but still inject randomness into them.

So yeah, that’s sort of what I’ve been working on lately. I should have more to show and talk about in a month or so.

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