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Machines That Make

Prusa i3 Parts

I’ve got a box full of Prusa i3 Rework parts! Well, not the full box, but we’re working on it. When I say “we” I mean myself and my team. This is all for a class titled “Digital Fabrication and Craft: Machines that Make”, which Frankie mentioned recently.

The class so far has been a blast! We’ve talked about the RepRap movement, and open source hardware and software used for 3D printing, and we’ve even designed a coat hook (yes, a nod to Adrian Bowyer.)

For the first assignment we are build Prusa i3 RepRaps, hence all the parts. We have a few MakerBots in the DCRL and the other students have been frantically printing parts. Meanwhile, I’ve printed most of my team’s parts on my RepRap Prusa i2. I sort of like the idea of my i2 making an i3. I may print enough parts to build out a frame and then transfer my i2 electronics and extruder over to it. Or I may just build another 3D printer instead.)

We’ve talked a lot about machines that make, and a little bit about MIT and what they’ve done. If you’ve seen the Othermill, you may or may not know it originated from an MIT project called MTM Snap.

And there’s more! For the second assignment each student needs to design and build a machine that can make things, and then we need to make things. Yes, we are rapid-prototyping rapid-prototyping machines. It’s a class made for makers, for sure.

One thing I’ve come to realize over the years is that you can design and build a thing, and you can design a product, and you can manufacture a product, and there are always compromises in process, materials, complexity, cost, quality, and fifty other things. A recommended reading in this area is Confessions of a Hardware Startup. Here’s an excerpt:

Our obstacle was that Jonathan had never intended MTM Snap for production. It was a design challenge experiment: to see if he could build a machine without screws. This is a great feature if you’re trying to save money as a graduate student, but from a manufacturing standpoint it had two major disadvantages.

Go read the whole thing if you’re interested in this. Since I’ve also been designing kits that are meant to be assembled and disassembled multiple times, I’ve seen similar (but different) challenges arise. But honestly, this all fits under the heading of “design” to me, because I still think design is about solving problems.

I’ve also been thinking a lot about the machine I’ll build. I probably won’t build a drawing machine right now (more on that later) but there’s a reason I’ve been researching the Othermill and been hankering to use a Shapeoko. It’s all coming together!

(See also: How To Make Something That Makes (almost) Anything.)

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(The Making of) Pizza Bagel Bot

Our old (dumb) pal Pizza Bagel Bot didn’t spring from the oven fully baked… far from it! Why, I’ll have you know I spent nearly an hour carefully crafting a block of wood and a delicious meal into a whirling cheesy disaster!

PBB Bottom

I started with a nice block of wood and drilled a few holes to mount the motors. The motors are these Pololu 120:1 Mini Plastic Gearmotors. These were the only “high-tech” thing I used. Just under $12 for two motors.

PBB w/ Motors

There were zip ties involved. And hot glue was added later. Of course. Oh, I did solder some wires onto the motor terminals. I was worried that might also be “high-tech” but whatever. I wired them up so that it would just go in circles instead of forwards (or backwards) because going out of bounds means you lose the match. (Note: The zip ties are from Harbor Freight. There should be bonus points for that.)

Control Knobs

Now, for the wheels… I actually designed laser-cut wheels that fit nicely on these motor shafts, but… high-tech! Instead I dug through the basement workshop until I found these old control knobs from Radio Shack. They have a little set screw, and I figured I could screw them tight to the D-shaft. Perfect! Almost!

Control Knobs

The outer rim part was too big, and they did not fit. A little time on the grinder took care of that… I consider the grinder decidedly low-tech. (At some point I considered just putting a wheel on the grinder and using that as my robot… maybe next time!)

Control Knob

Boom! 5 minutes later, the smell of melty plastic, and I had two “wheels” which would be all wobbly because they didn’t center correctly on the D-shaft. No matter.

PBB  Assembly

Wheels are on, and the wires are twisted together, but not soldered, in case I want to reverse the wiring or something. It’s starting to look good. If you squint real hard you might mistake this for an actual not-dumb robot!

I seem to be missing some photos, but at some point I decided the square shape was no good, so I used a coping saw (hand-powered!) to cut the corners. (Literally!) I then needed something to hold the pizza bagel in place…

PBB Bottom

Nails are good for holding things in place. They also split wood. I split the wood. No matter, because… hot glue.

Pizza Bagel Bot

I also added this “high-tech” battery holder, which was a whopping 79 cents… Oh, the alligator clips were taken from some jumper wires I melted at some point. It’s not the volts, it’s the amps, kids! The batteries are AA and I’ve had them for years.

PBB Bottom

Oh yeah, the screws! Typically a robot will have a caster wheel or two, but at $1.99 each, and needing two of them… over-budget! (I could have 3D printed one but… high-tech!) The screws are not drilled into the wood the same amount because, me. This helps it wobble more unevenly. On purpose. Obviously.

Pizza Bagel Bot

Wow, look at that beautiful robotic platform. In about an hour. And I probably got distracted for part of that hour. The only thing missing is a delicious pizza bagel.

Pizza Bagel Bot

Mission Accomplished!

Don’t forget to check out the video, which at least one critic described as “mesmerizing”. Also, if you’ve got any good pizza bagel recipes, post them in the comments!

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Pizza Bagel Bot (is Dumb!)

Pizza Bagel Bot

Our friends down at Pumping Station: One in Chicago have taken a cue from Hebocon and are holding a Dumb Robot Competition for Dummies tonight.

I am a dummy! (Or at least I can pretend to be one…)

Even though I’ve built functional robots, I tried really hard to build a dumb robot that is terrible. The result is “Pizza Bagel Bot” which you see here. (I used no digital fabrication in the building of PBB.)

I’m sure this will strike fear into the hearts of all who challenge Pizza Bagel Bot, so beware! And be aware.

I’ll provide more details about “PBB” in the coming days, but for now, enjoy this video proof of the mayhem of cheese and sauce that will be unleashed tonight!

See Also: The Making of Pizza Bagel Bot

Update: We won the first match we were in… and lost the second.

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Grad School – Semester II

UWM

I haven’t really posted much about school since I mentioned it in August, but the first semester went well. I made good progress with some of my projects, learned a lot, and ended with 4.000 GPA. I’ve also met some amazing people, and have become re-energized about art and design.

This semester should be even more exciting, as I’ll be a Lab Instructor for Digital Arts: Culture, Theory, and Practice. In Guan-speak I will have what are known as “ducklings”, though I believe “students” is the term most people use.

I’ll also be putting in a bunch of hours in the DCRL doing various projects, which is pretty exciting. I’m hoping to have a new pile of skills by the end of the semester.

There’s also some classes in history, and philosophy, and concepts, and other things I’m not as interested in, but hey, requirements, right? I know it’s all valuable, but sometimes lectures and seminars leave you itching to get into the studio and make things instead of just talk and think about things.

OK, kids, here’s to a great semester!

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The Ice Hammer

Ice Hammer

I present to you… The Ice Hammer! Which is, of course, a hammer made of ice, and not a hammer made of something else that is mean to pound ice. That would be ridiculous, obviously.

MakeShift Milwaukee

I’m sure you’re wondering how I made this ice hammer. I shall tell you. Over at the Betty Brinn Children’s Museum there’s plenty of great stuff for kids. You might be young at heart, or just love hands-on science-type fun stuff, but as an adult you can’t really go to the museum without a child. Yeah, adult without a kid? You’re out of luck. The museum folks realized this wasn’t ideal, so they are starting a program called MakeShift which is an “adults only” thing at night, for adults interested in maker related activities.

I attended last night, and besides the provided food & (adult) drinks, we got to use a plasma cutter, play with a re-purposed/hacked pen plotter, see a trio of 3D printers spitting out plastic, and play around with other fun things. There was sewing and craft related stuff as well, and… oh yes, a vacuum former. You may have seen the hammer I made.

Ice Hammer

After we vacuum formed the hammer, I thought that it would make a nice mold for… something. Eventually I determined that it could hold water (well, after taping up a small crack caused by releasing the original hammer from the plastic sheet.)

Ice Hammer

I filled it with water, and carefully (uhhh) placed it in the freezer. And then wiped up all the water I spilled. Pro-tip: fill it with a cup while it’s in the freezer, or put it on something flat to transport it.

Ice Hammer

After freezing it was fairly easy to get it out of the plastic. I had thought I might have to let it melt a little, or add some warm water, but it came out in once piece.

Ice Hammer

I then made a second hammer, this time adding some food coloring to the water. The different colors didn’t really mix well, so I mixed them together, but I may do this again and let them stay separated from each other.

Ice Hammer

You can see the colored one broke. That happened when removing it from the plastic. Maybe I was a bit rougher on this one, or maybe the food coloring caused some strange weakness in the ice. (OR maybe I took it out too soon!) I’m not actually a scientist, but I welcome any ideas on the topic.

The next event is February 5th, 2015 and the topic is “Hot Stuff!” which could have something to do with Valentine’s Day, but I’ve heard rumors there will be soldering, hot glue, and drinks.

Keep an eye on the MakeShift page for upcoming events and other info… See ya there!