Originally we wanted to make the raft how most people do, wood and barrels. However, after settling on a size, we quickly realized that wood and metal barrels are quite heavy.

Eventually, after tossing around ideas ranging from aluminum square channels and dock pieces, we settled on 6 premade plastic pallets and 8 plastic food-grade barrels. The combination left us with a very sturdy initial platform to build our raft on.

Prior to settling on a pontoon orientation, we experimented 4 sets of 2 side by side barrels but determined that the water resistance and transportation would be a challenge.

The first task was to secure each pallet together over the length of the raft and then the width. To accomplish this we took 12 foot pressure treated 2x4s and hammered them into the fork spaces of the pallets.

Hammering the 2x4s into the pallets proved to be difficult so clamps plywood cutoffs were used to align the pallets.

Once hammered through the length, the 2x4s were hammered as close to the edges as possible and screwed into place with long wood screws through the bottom of the pallet. This processed was repeated for the other set of three pallets.

The two sets of three pallets were then secured together by drilling holes through the 2x4s and running cut lengths of 3/8 inch threaded rod between them. These were secured with nylon lock nuts and washers.

Another experiment with mounting the barrels, this time with steel strapping to the hammered 2x4s, this ended in abject failure.

Our raft now needed a way to get around, for this we went with a small 3.5 HP outboard off Amazon.

Being a 2 stroke that runs off a gas-oil mix we had to break-in the motor per the manufacturer manual, very loud in a suburban driveway…

The project was then moved to a different location and sat for a while before being picked back up this year. We discovered that the threaded rod held the pallets together, but didn’t stop them from flexing and coming loose. To address this we added 2x4s along the top and bottom short edges and bolted them together.

We also added a ladder off the front for swimmers to get back on.

No raft is complete without carpeting and shade! This pavilion off Amazon with mounting holes in the feet was able to bolt with nicely through the pallet deck. We also tested a few types of carpeting and turf before settling on marine “boat bunking” carpet.

Using leftover 2x4s we built a motor transom off the back.

The end result was too large for our trailers and had the barrels attached on-site. Due to the motor, the raft had to be registered as a boat with the DNR and required a licensed operator.

IT FLOATS…always knew it would…

The Wisconsin River is quite shallow in some places and requires the use of our high-tech stick.

When the river was deep enough, the small motor had no problem moving the raft at a blistering 5 MPH!

To say the raft was a hit with friends on the trip would be an understatement, the 8 of us spent most of the time enjoying the sun as we floated down the river.

Unfortunately, the trip was not without incident. As we were disassembling the raft at our take-out point, a strong gust of wind blew over the decking and crushed our plastic light and fire extinguisher mounts. Luckily, no one was hurt and we got the raft and barrels back on the trailer.

That’s likely it for this year, river levels continue to fall in the summer months and would make the trip much harder. We’ll likely revisit this project next year and make improvements on the weight and transportation side. 

Written by Michael Reichard

The only requirement is we need to have molds made and iron broken. Until we have molds that equate to an estimated total of 500 lbs of metal,  we will not be able light up the furnace.

Meet us on Wednesdays at 5pm to get signed off on mold making processes and getting signed off to use the crucible furnace. Bring a pattern to get cast or if you just want to check out the area come on by. No appointments are needed. We need your help to make molds. Premade artist tile molds are available for sale with the cost of metal included.

In addition, if you happen to see a cast iron tub, sink, or radiators on the side of the road please contact Dave to collect it. The more cast iron donations we can get the better.

Casting Area Wiki

For the past 2 months a team of makers has been frantically designing and building a glider for Redbull Flugtag.  It was one of the most fun projects I have ever had the privilege of working on.  Thought we did not place in the competition I wanted to share what we have learned and share some CAD files for future Flugtag builders to find and reference if they wish.

Team Flies at All:

When I put up the call to see if other members where interested in participating I was shocked when almost 20 people came to the first meeting.  At that meeting two opposing directions were posed for our entry.  One was a craft that would be as crazy as possible that would just be fun to look at and not attempt flight in a meaning full way.  The second was “team flies at all” who thought the fun part of the project would be the challenges of making a craft that would generate lift.  As the next weeks went on that second team was the only group that kept meeting and planning.  

Material choice and testing:

At one of the first design meetings Jon Drayna brought in a sample that he had worked on that week that would become the structure of our design.  It was 1 inch pink insulation board laminated on either side with 2mm strips of wood.  This made the normally flexible material very ridged while still being extremally light weight.

With this structure in mind I went to work in Fusion 360 and modeled up a craft.  Using a paper added to a google drive the team was sharing I was able to design a parametric air foil that would in theory provide high lift at low speed.  I even devoted the weekly Fusion 360 class to making an airfoil.  Below is a link to that class and the parametric airfoil Fusion 360 file will be in the link at the bottom.

We chose to cover our wings with window cling film.  I think this is one of the best choices we made.  Even though the film required lots of care it was cheap and light weight compared to alternatives.  On the day of the event we saw boat vinyl and lots of other materials but I stand by our window film.  Another decision that I was happy with on our craft were the ridged supports in the front and back of our wing.  Lots of teams chose not to do this and their air foil shapes were lost due to the shrinking material. 

Our biggest lesson:

If you have ever attempted to do something for the first time before you know that it usually doesn’t work.  We all had lots of optimism about our chances to “fly” but it takes practice to learn new things.  You can’t make an omelet with out breaking a few eggs.  On Flugtag our point of failure was the cart.  We knew that if the back of the cart were to push up on the back of the glider it would push the nose down right into the water.  We had taken care to design a two part cart that would we thought drop away from the craft with the use of a one way hinge mechanism.  The idea was as the front of the cart holding the glider went off the edge it would fall down bending at the hinge and not creating leverage lifting the back of the glider.  Maybe it was swelling due to humidity or jus the paint being sticky but this was our point of failure.   You can see in the video the cart breaking part of the tail as it forced it up and as soon as it fell away the wings started to work.  It was too late at that point though.

I use used a bad word in that last paragraph, failure.  At least most people think of it as a bad word.  Lets reframe that right now.  Failure is what happens on the path to success.  Failure is what happens when you are pushing your self far beyond your current capabilities and knowledge.  No one has ever learned something from success it is failure that teaches us and failure that motivates us.  

We failed to fly but we succeeded at working together to build one of the coolest projects to ever come out of this building.  It was so much fun working with everyone that pitched in for an hour or two or for weeks on end.  The bravest member of the Makerspace, Faith, got to stand on a stage in front of 50,000 people and answer questions about what a the Milwaukee Makerspace is.  I have zero regret except for maybe not jumping of the edge of the ramp…

Open Source Everything:

We learned so much.  You can take a look at our CAD files and build images and learn with us.  All are at the link below for you to copy and improve.

Open Source Project Link.

Our 3 cars raced with 34 others in the biggest Power Racing Series event to date on the biggest track ever made.  It was great to see all the hard work paying off as the builders of the cars became the happy drivers of the cars. Both days of races were streamed live by our friends at Make Magazine to Twitch.tv where they can still be watched. Be sure to check out the race at Maker Faire Milwaukee September 24th-25th.

Check out the race from day one at the link below:

https://player.twitch.tv/?volume=1&video=v80805800&time=04h50m54s

Check out our pictures:

Cheers!

32V Power supply for Y axis motor. No regulation necessary!

Smoothieboard is supposed to read the config.txt file from its uSD card (conveniently accessible via USB) every time it boots.  That makes changing configuration very easy and fast – all you do is edit the config.txt file, save it , and reboot the board.  Firmware is updated the same way.  With the ATMega2560 you have to find the configuration variables by searching through multiple configuration files, make the necessary changes, recompile the firmware, then flash the controller.  I said the SmoothieBoard is supposed to read the file every time it boots, but it wasn’t doing it.  I’d make changes and they would not appear in the behavior of the printer.  Hmmmm.

Layers kept shifting in the X-axis- I expected Y-axis problems, but not X!

I attempted some prints and managed to get two decent ones in about a week of screwing around with it.  I tried dozens of combinations of speed, acceleration, junction deviation (smoothie-speak for jerk) and even tried different slicers.  The machine went completely nuts on two occasions and ignored the Z-axis limit switch and slammed the extruder into the print bed, gouging through the Kapton tape and into the aluminum!  I decided I needed some professional help so I got on the #smoothieware IRC channel and discovered that the developers of the board/firmware hang out there quite a lot.  After a lot of back and forth Q and A and testing someone suggested it might be the uSD card causing the problem.  I picked up a new card at Walmart, put the firmware and config files on it , booted the machine, and attempted a print.  PERFECT!

The new uSD card worked! The small round post is 4mm diameter.

I have made several prints since last night and they have all come out fine.  I still have a little tweaking to do and to test the limits of the machine’s performance, but I think the problems are behind me.

Next up:  X-axis redesign/build.  I’m replacing the two guide rails with a single linear guide.  I have also ordered and received a BullDog XL extruder to replace the hacked up QUBD unit I’ve been using.  I’ll be adding a DSP driver and 32V power supply for the X-axis motor, too.

After that, I have some ideas for a filament respooling machine and ways to fix the retraction problem in the SnakeBite extruder.

It never ends!

CAD rendering of the parts

After much thought and a few prototypes I came up with a system that allows a laser to mount on a phone and that assembly to mount on a tripod, a handle, or a telescope.  The tube that holds the laser has adjustment screws to allow the laser to be aligned with the SkyMap on the phone.  It also has to slots that fit over standard gun sight rails.  On one side I have a phone/tablet bracket that has a gunsight rail and slides into the laser tube, and the other side can be used for a rail that mounts on a tripod or a handle.  Extra rails can be mounted on telescope tubes.  I haven’t yet designed a binocular mount, but will soon.

Parts printing on MegaMax

I printed the parts on MegaMax with Octave fluorescent red filament (that’s why the colors vary in the photos- the flash apparently excites the fluorescence in the picture with the handle).   All the parts fit VERY tightly together but I included screw holes for extra security.  The phone/tablet mounts on the bracket using velcro tape.  I think it may be better to print or buy a cheap case to fit the phone than screw it to the phone/tablet bracket.  I’ll be posting the design files to Thingiverse shortly.

Phone and laser mounted on handle

Phone and laser on a tripod

Around 25 members have hopped in the new Milwaukee Makerspace Theater after the last two Tuesday meetings.  Its up and running in a “no hearing protection required” way!  The bass still goes way down to subsonic tones, but its being powered by a small & sensible surround sound amp.   Its a very immersive audio experience, and likely sounds much better than any 5.1 system you’ve heard because there’s only one seat!  The sound has been optimized for the single theater-goer: You!  The theater is hooked up to a DVD player, and is available 24/7  for any member to watch a movie in: no check-out required.   Note that any video source you have can be hooked up via the HDMI cable.  Alternately, you can follow the lead of JasonH, who used the theater with a portable audio player to rock out while he worked on his own project near by. See the photos below for the simple instructions on how you can start up the theater, and feel free to take a break from making by using the theater!

Made from multiple layers of acrylic, cardboard, and wood, the “Milwaukee Makerspace Consumables Super Analog Status Board” is a clipboard-sized device with nine sliders installed in enclosed slots.  Sliding the tabs right displays more green to indicate “full” or “lots” and sliding left reveals the red acrylic below to indicate “empty” or “low.”  The user can carry the board around the Space with them as they check on supplies and when done, a large hole centered at the top allows the board to be hung up and displayed on a wall.

The hardware holding the whole thing together can be loosened and the layers disassembled.  The cardboard insert that the text resides on can be swapped out should we decide to change the list of items we want to keep tabs on.  The supplies being tracked currently include:

• Toilet Paper
• Paper Towels
• Hand Soap
• Welding Gases
• Welding Wire
• Propane
• Soda
• Duct Tape
• Painter’s Tape

A digital version may or may not be planned for future release.