Digi-Comp Making

Digi-Comp II
Photo by Windell Oskay

I love a good blog post! And I really love a good blog post about the process of making things! From selecting the proper wood, to cutting, laser-etching, assembling, and packaging, this blog post has it all. I’m taking about The Making of the Digi-Comp II, First Edition from our friends at Evil Mad Scientist Laboratories.

There’s a great/amusing comment on the post:

When’s the official air date on “How It’s Made”? :D

It’s funny because it is a long and detailed post about the process of making something (disclaimer: I’m a fan of shows like How It’s Made) but I don’t think a maker version of How It’s Made is a bad idea! Hmmm, maybe that’s what the MAKE TV show is going to be.

M1 and M2

M1

M2

If you saw Shane’s post Submission for the 100 Square Feet of Art Charity Event you probably wondered if anyone else managed to create a piece of art for the event, and if they too used the laser cutter. The answer to both questions is “Yes!” and here are the two pieces I created, M1 and M2.

There’s an in-depth (and potentially boring) post about these pieces over on my blog titled Two Square Feet of Art. Enjoy!

Laser Badges!

Laser-cut Name Badges

We saw these nice laser-cut name badges on the Pumping Station: One wiki, and thought that Milwaukee Makerspace should have some as well, and Saturday night’s alright for laser cutting so now there’s about a dozen blank badges for people to make their own badges. (And the one test badge I already make for jason.)

Have I mentioned I love our laser cutter?

More Banned Nerdy Derby Cars!

I made the car “Sling Shot” to enter in the recent 2012 Milwaukee “Nerdy Derby.”  During a few initial test runs, my car proved to be more than 10 times faster than the super-clever winning car made by HaveBlue.  Unfortunately, my  car was banned from competition because it was considered a threat to the spectators’ safety!  The consensus was that it had “too much momentum, or energy,” and would hurt someone if it went off the track and hit them.  What does too much energy mean, you ask?  Well, kinetic energy is ½ X Mass X Velocity^2.  Really then, the car was banned because the velocity is too high: It is just too fast!  I’ve already minimized the mass by making the car out of pine, although I could have made it from Balsa Wood, or even entertaining alternate materials such as these.

Anyway, its no fun to think of how to slow Sling Shot down so that its slow enough to safely race, but still fast enough to win.  Instead, I made some new car prototypes that amp up the speed and danger.  If I’m going to be banned in the future, I may as well get banned with style!

Below is a photo of Sling Shot, which traveled the 40′ track length is 0.1 or 0.2 seconds, for an approximate average speed of 300 feet per second, or 200 mph!  Note that the block is anchored to the finish line, thereby stretching the surgical tubing which acts as a spring to propel the car.

I realized that the dominant energy loss mechanism is air resistance – largely because Sling Shot’s wheels don’t even touch the track.  You see, the car doesn’t follow the contour of the track, it just heads directly to the finish line, through mid-air.  I spent some time engineering a more aerodynamic shape to further boost Sling Shot’s speed, searching for a shape that would really slice through the air.  I even consulted a team of highly trained German aeronautical engineer friends, who all approved of my slingshot propelled Henckel Car.  With the improved aerodynamic design, it should easily be faster than the 200mph Sling Shot car shown above.

The other car I built this weekend is also based on Sling Shot, but incorporates some classy chandelier bulbs.  The numerous ‘safety’ lights alert the time keeper of the imminent arrival of the derby car – for safety.

Lasers + Whisky = Delightful Wedding Gift

One of our members got married yesterday, and I crafted a fine gift for him and his wife at the Makerspace.  The happy couple enjoys whisky, and I thought that providing a tour might be a nice idea.  The tour starts at inexpensive bourbon, moves through wheated whiskies, and on to rye. The tour continues in Scotland with some easy to enjoy Sherry cask finish bottlings, and then moves on to rare, Islay and finally mature bottlings (25 Year old Talisker!).

I found some old mohogany baseboard that had some aging varnish on one side and some old caulking on another.  After cutting two 18″ long sections, a few minutes of belt-sanding had them looking great.  I used a 1 1/4″ Forstner drill bit to bore 0.3″ deep pockets for the bottles to fit in.  I used one of our two laser cutters to etch the name/age/proof of each of the whisky sample on top, plus a congratulatory message on the reverse side.  To bring out the rich orangy-red mahogany color, I wiped on Beeswax / Mineral Oil .  Check it out close up, while imagining the symbolism of things getting better with age!

Nerdy Derby Car From The Future

I made the car “Sling Shot” to enter in the 2012 Milwaukee “Nerdy Derby” at Barcamp7 this weekend.  A lot of people were talking about adding motors and fancy electronics, but my car is powered by a spring – a 10 foot length of surgical tubing that is stretched to another block of wood that must be clamped down.  I added wheels, but they aren’t necessary – they don’t actually even touch the track.

Check out what may end up being the only two runs the car has.  Fortunately, JRock captured some video of them.  I’d estimate that the car took 0.1 or 0.2 seconds to travel the 40 foot length of the race track, giving an average speed of 300 feet per second (200 mph!).  The great part about this “sling shot” design is that the car is accelerated by the surgical tubing spring throughout the first 30 feet of the track – until the surgical tubing is completely unstretched.  “Beautiful!”

 

60 Watts of Lazzor Power!

Laser Training

Last week we got the 60 watt laser cutter “officially” online and working. We even got a bunch of people trained on using it. There’s still an issue with homing, but if you follow the instructions, it works fine.

And by “works fine” I mean it “works great!”

I ended up cutting my Nerdy Derby car last week, and I also did this laser-etched coaster, which is about 3.75″ in diameter and 3mm thick. There was a little bit of scorching at the bottom, but I may be able to sand that off easily. I was still playing with the cutting settings a bit. I may also play with the masking tape idea to prevent scorching the surface when cutting.

Laser Etched and Cut

The artwork for the coaster is a mathematician from a NASA coloring book, and I found it on OpenClipArt.org which is a great source for public domain vector-based artwork.

(Oh, we also ended up connecting the PC that was on the 25 watt laser cutter (which is down for maintenance) because it’s got a newer version of CorelDraw.)

Cacophonator Enters The RPM Challenge!

At Noon today, the Cacophonator decided to enter the RPM Challenge!  This challenge is simple: Compose and record an album entirely during the month of Februrary, be that 10 individual songs or a single 35+ minute track of original material!  After a thirteen second test, Cacophonator was proven to not be up to this challenge as a solo act – It’s just too loud.  Enter Mohoganator: The distortion reducing, level adjusting perfect partner for this challenge.

The Dynamic Duo of Cacophonator and Mohoganator teamed up with Auditionator (I.E. Adobe Audition) to record a session for 10 minutes and 32 seconds at a blazing fast 192kHz sample rate.  This recording was then slowed down to the customary rate of 44.1kHz, thereby expanding the work to its final 45.5 minute length.  Within twenty minutes after the recording was made, Cacophonator had a profile set up on the RPM Challenge site and the piece normalized, saved as a low bit rate mp3 and uploaded.  You’ve read that correctly, in less time than it takes to listen to this piece, it was composed, recorded, processed, mastered and uploaded.  Talk about Non-Causal Audio Delight!  Check out the piece here, by scrolling down to “my player.” This all happened very fast, but Cacophonator still isn’t quite finished – it hasn’t yet mailed a CD to RPM HQ, 10 Vaughan Mall, Suite 201 Portsmouth, NH 03801.  Interested participants still have over 11 days to enter the challenge!