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LaserCut LetterPress

ART

“LaserCut LetterPress” (for lack of a better name) is a project I worked on in 2014/2015 which was an idea to create a full letterpress set using a laser cutter capable of cutting 3mm Baltic Birch plywood. The idea was that the files would be released that allowed anyone with access to a laser cutter (even lower-powered cutters with small beds) to create the set.

I know there are many ways to create things, but at the time I wanted to limit production to one method, and one particularly fast method, vector cutting with a laser cutter. (Note: If you’re fascinated by the production of wood type, check out Moore Wood Type.)

I mentioned some of the process in a post titled Measure Twice, Laser Once… but never wrote up the whole thing, so here we go.

LaserCut LetterPress Example Print

The typeface I chose was OpenDyslexic, which was inspired by a friend who is Dyslexic. I also thought it would be interesting to use a typeface that was new, and didn’t exist in the time that wooden type was widely used.

Art Letters

I did the design in Inkscape, creating the letter and the pieces that fit under the letter so it could slide into a tray.

Letter and Tray

Wood is such a wonderful material, except when it isn’t. Tolerances caused a number of issues, but I kept going forward, and didn’t worry too much about having things fit together perfectly. (I won’t say this was my downfall, but I spent a lot of time fighting it.)

Art Letters Tray

Here’s the design for the small tray. Ultimately I wanted a larger tray that had multiple lines so you could do an entire poster. That of course would have required an entire alphabet, and multiples of most letters, and punctuation, and… letterpress is hard.

Oh, somewhere along the way I also started to write code that would generate all the characters needed by outputting the needed SVG files. In theory it was totally doable, but in practice it served as a distraction that I eventually ignored.

Art Letters

With the plan to turn this into a kit that one would assemble, I thought about how one would determine what pieces would go together, and thought that etching the letter onto each piece would be a good idea. (I didn’t get to this step due to being stuck in the prototyping phase.)

Tray

Here’s the letter “A” sliding into the small tray I made. Tolerances were good with the first batch of letters, but with subsequent pieces not so much.

ARTS+TECH

You can see a bit of the height difference with this batch of letters…

Height Comparison

…and you can really see it with these. Yes, this is all 3mm wood. Again, as mentioned with the previous post, there can be quite a difference when the layers add up.

ARTS+TECH

I did manage to create enough letters for one of the Arts + Tech Nights at UWM.

TEACH ART

And oddly enough, I was able to arrange the letters into “TEACH ART”, which I ended up doing six months after I abandoned this project.

LaserCut LetterPress Example Print

Here’s a few test prints I did. They worked fine, which made me think I may have overthought how “perfect” it had to be. In the process of talking to printmakers (who were very interested in the project) they got me thinking about type height, which is useful for a press (and I considered using these letters on a press) but in the end I think I should have stuck with my “hacker ethic” and just made it work with the minimal amount of success.

I don’t consider this a “failed” project because I learned a lot in the process (and got to meet & work with some awesome people) but I’d love to see someone else run with this idea… or maybe it’s something I’ll pick up again in one form or another.

Remember kids, Keep on Making!

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We are a Nation of Makers

NoM

I’m pleased to announce the Nation of Makers organization has finally launched. Check out nationofmakers.us for the full story.

I wish I could have done more to help with the launch, but between organizing Maker Faire Milwaukee, launching a new exhibit, and teaching PCOMP at UWM I was pretty much devoid of any free time for other things the past few months.

Luckily, we’ve got just six more weeks of class and then the holidays hit, and I’m hoping by January I get just a bit more free time to pitch in and help with NoM stuff if I can. (I know a number of great people involved, and they’re doing a fantastic job, but if my skills can assist, I’ll certainly lend them!)

No matter what role I play officially with the Nation of Makers organization, I’m sure I’ll continue to help the movement by producing Maker Faire Milwaukee (still the largest free-to-attend Maker Faire in the US), doing what I can to help Milwaukee Makerspace (and other creative spaces) and sharing my knowledge by teaching others and trying to build a community around the love of making and creating.

Let’s hope for some greatness in 2017!

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A Motor Controller for PPPRS

Stair Car

I’m going to be posting a bunch about a 2017 build for the Power Racing Series, and along the way I’ll be highlighting some parts of the build and explaining things. We’ll start with the motor controller, because being able to control the speed of a motor is crucial to building an electric vehicle. (Yes, we’re building an electric vehicle. Check out powerracingseries.org for more on this whole thing.)

DC Motor

Disclaimer: In some parts I’m going to keep things fairly simple.

Let’s start with some basics. A DC (direct current) motor spins when connected to power. In the diagram above we’re using a small motor and a 9 volt battery. Connect them together and the motor starts to spin. If you flip the wires (as in red wire to yellow wire, and black wire to green wire) the motor will spin in the opposite direction. This is how “brushed” DC motors work. There are also “brushless” motors, but we won’t get into those.

I sometimes like to refer to DC motors as “Don’t Care” motors. Want it to go the opposite direction? Flip the wires. Want it to go a bit slower? Give it a lower voltage. (Again, we’re simplifying things.)

Motor Controller

Here’s a motor controller. It has a connectors so you can connect a battery and a motor. You can’t make the motor go in reverse with this controller, but that’s okay for now. You can control the speed of the motor, but we don’t do it by lowering the voltage we do it by using “pulse width modulation”, commonly referred to as PWM. PWM is a method of controlling motors, lights, and other things by turning on and off the power really quickly. (Here’s a SparkFun article about PWM.) If you’re wondering why we don’t just lower the voltage (perhaps by raising the resistance) to make the motor go slower, read Why is PWM used to control DC motor speed instead of using a variable resistance?

Motor Controller

OK, so this motor controller comes with a potentiometer. When you spin the potentiometer is varies the resistance from 0 to 100K ohms. This get translated by the controller and feeds the appropriate PWM signal to make the motor go somewhere between not moving at all and full speed. The 100K pot also has two extra wires which work as a simple switch to turn the motor controller on and off.

Before we move on, a bit more about this controller. It’s from China, and it’s really cheap. I only recently discovered it’s a “Leadrise” controller after someone provided this Amazon link. You can find these on eBay for under $13. (Damn, that’s cheap!) I’m going to focus on doing a low-cost build, so keep that in mind along the way.

Throttle

The 100K pot is a nice way to test the controller and make your motor spin fast and slow, but you aren’t going to want a little potentiometer on your electric vehicle! Let’s find a throttle. Now, motor controllers of this variety typically require a “0-5V” throttle, or a “0-5K throttle”. The good news is, the 0-5V throttles are really cheap, the bad news is, this controller requires a 0-5K throttle, which are not cheap.

Magura makes a nice 0-5K throttle. You can find them for around $50 or so. There’s also a 0-5K thumb throttle that’s a bit cheaper. Any of these 0-5K throttles will work fine with this controller, and if you can decipher which wires are which you can cut off the 100K pot and wire in the 0-5K throttle. Easy, right!?

In a future post we’ll get into connecting up the throttle, and after that we’ll look at adding in reverse, and eventually get into building our own throttle controller that will allow us to use very cheap 0-5V throttles with this controller.

See Also: Controlling the Controller Cheaply

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On the Arts…

ART

What I would say to my students all artists & creatives…

Art matters, and it can be an agent of change. Art can make people think, and thought can lead to action. Art can reveal hidden truths, and art can change minds. Art can be a voice for those that feel they have none. If you’re angry, channel that anger into action and expression. If you feel afraid, create art that relays your feelings to others. If you make music, write protest songs, if you write poems, imagine a better world and share it through your words. If you make images, create strong images of a brighter future that can inspire people.

Art is a weapon… wield it wisely.

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PCOMP – Assignment 3

Cameron

Alex

Katrina

Maks

Megan

Sadie

Stefanie

Sarah

Malcolm

Raven

Ali

Chance

We’re already half way through the semester and finished our third assignment for Electronics and Sculpture last week. Assignment 3 requires analog input and output for the project. (Assignment 1 is purely digital, and Assignment 2 requires analog input for control.) And yes, the class is called “Electronics and Sculpture” but it could just as easily be named “Arduino for Artists”.

Projects have varied from very interactive to installations to mostly sculptural with some electronics added in. I find that students do the best work when they can take what they are learning in class and combine it with their own practice, or what they are learning in other classes. The Digital Fabrication students definitely have an advantage here, and I wish all of the students had access to digital fabrication tools, though we just wouldn’t have time to cover it all in the 318 class. (That’s not to say the work of non-Digital Fabrication students is lacking in any way, and I’ve seen some great work using very simple material and tools. As always, art is a combination of things, including concepts, themes, ideas, technical skills and abilities, and more.)

We’re currently in the middle of the midterm project, and things are coming together quite well. Critique is in two weeks, and after that we launch right into the final project. (Since there isn’t an Arts+Tech Night this semester, we’ll probably just push the final critique onto the date that our final exam is scheduled for.)