Robbie is nearly weaponized….


router clamp in foam 2I am nearly done with a custom bracket for my Hitachi router that I will mount onto the end of our Kuka industrial robot arm.  I cut everything out in foam first to check  out the whole scheme and save wear and tear on the cutting bit.

flange for RobbieThe software chain I used to accomplish this was lengthy.  I designed all of these pieces in 3D in Solidworks, created a Solidworks 2D drawing, saved that as an AutoCAD drawing, brought that drawing into Vectric’s Aspire, then created machine code that the Makerspace CNC router used to cut the pieces from a sheet of foam.

finished clamp

Finally, once I was satisfied that everything would cut correctly, I switched to 3/4″ thick Baltic Birch plywood.  This is a “nicer” grade of plywood than the stuff that is used in day-to-day building construction work.  This wood is stronger by virtue of a greater number of plies, and it also looks nicer.  I happened to have a sheet left-over from a previous project, so it was all good!

plywood sheet

Staying Stocked Up

The idea was simple: make something to help keep track of our supplies so we know when we’re running low on the essentials.  After weeks of kicking the idea around and various rough doodles, this project finally took shape.  Two days after the first cut on the laser cutter, it was complete.


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.

MegaMax 3D printer lives!

After a year’s work designing, building, scrapping, redesigning, building, and working through software and firmware issues, the MegaMax 3D printer is now functional.   It has some common 3D printing issues like printed objects peeling up off the glass printbed.   Tweaked settings in Slic3r, ABS “juice”, and Aquanet hairspray have all been tested with moderate success in attempts to improve adhesion to the printbed.  Finally, have_blue gave me  a block of foam out of the Stratasys printer to try out and it seems to work better than the other methods and doesn’t require heating the bed!  Further experiments to be conducted post-haste.

More info on this project can be found here: http://wiki.milwaukeemakerspace.org/projects/megamax_3d_printer

MegaMax printing on foam from Stratasys printer.

MegaMax printing on foam from Stratasys printer.

A Clockwork…Room Divider

A 6 foot tall, clockwork gear inpired, tri-fold room divider

Hopefully, we can use this as a backdrop for events like the Art Jamboree.

I’ve been toying with the idea of room dividers for a while now. I don’t exactly have use for one, but I think they look neat and it’s basically a blank canvas. Drawing inspiration from my Clockwork Boxes, I decided that a gear motif would best suit the makerspace, thus giving me a new use for the piece: as a backdrop at events we participate in such as Art Jamboree and the various Maker Faires.

A picture of myself, Jason, and Matt, standing around the room divider

There are 3 of us in this photo. Really.

The actual screens were cut out with a large-scale CNC router, while the frame was ripped from 2×4’s, with a dado groove down the center for the screen to slip into. Thanks, Jason H.!!

Assembly went well, although there were a few hiccups.  The drill bit wasn’t long enough, so some minor splitting occurred at a couple of spots. The frame was slightly warped and so needed to be clamped and glued before being screwed together.

After allowing the paint to dry overnight, myself, Matt W., and Jason H. assembled this thing just prior to heading to the Art Jamboree at the Hilton in Milwaukee.

EDIT: I’ve just entered this into the Furniture Contest that Instructables is running. Click the link. Vote. Be thanked. :)

FEAR

 

I’ve updated Robert Indiana’s iconic sculpture “LOVE” for our times!  While “Love” may have been an appropriate sentiment from 1964 to 1970 when the 2D and 3D versions were made, I think that the revised text is more appropriate for the 2000’s and 2010’s. Fear is 8” tall and 4” deep, and while not a monumental outdoor sculpture, FEAR appears fairly sizable on a table top.

Fear, which is solid aluminum and weighs over 7 lbs, was cast last Thursday with quite a few other pieces.  The great thing about having an aluminum foundry at the Makerspace is that the whole thing cost about $7!  – $4 for propane, $1 for Styrofoam, and $3 for some Rotozip bits.  If FEAR were cast in bronze, it would weigh over 20 lbs, which would cost $200 for the metal alone.  As it is, we melted down old heat sinks, stock cutoffs and hard drive frames, so the metal is essentially free.

In the spirit of Indiana who made his own font, I drew FEAR up in Inkscape using Georgia Bold, but I increased the height of the Serifs a bit.  Shane helped me with the file manipulation and G-code generation (Thanks!), so I could use the CNC router to cut FEAR out of styrofoam.  I exported FEAR’s hairline thickness outline as .dxf so it I could bring it into CamBam to generate the G-code. The outer contour of FEAR was selected, and the following settings were chosen:

  • General -> Enabled -> True
  • General -> Name -> Outside
  • Cutting Depth -> Clearance Plane -> 0.125 (inches)
  • Cutting Depth -> Depth Increment -> 1.05 (inches)
  • Cutting Depth -> Target Depth -> -1.05 (inches)
  • Feedrates -> Cut Feedrate -> 300 (inches per second)
  • Options -> Roughing/Finishing -> Finishing
  • Tool -> Tool Diameter -> 0.125 (inches)
  • Tool -> Tool Profile -> End Mill

Identical settings were chosen for the inner contours of FEAR, with the exception of General -> Name -> Inside.   Then, I just selected “Generate G-code.”  Check out the real-time video of Makerspace CNC router running the G-code and cutting out the 1” thick Styrofoam (Owens Corning Foamular 150).

After cutting four 1” thick pieces, they were stacked and glued together.  I buried the foam FEAR in petrobond, and then attached Styrofoam sprues and vents.  For a more complete explanation of the quick lost-styrofoam casting process, check out this post.   Stay tuned for details of our next Aluminum pour, which will be in January in the New Milwaukee Makerspace!

 

MegaMax Lives!

The video shows the last few layers of the calibration cube “printing” at 414% speed (according to my LCD display).

The Bucketworks 3D printing meet-up on 8/12 paid off big-time!  Gary Kramlich helped me debug a problem that was preventing me from flashing the firmware on the controller board for the MegaMax 3D printer.  After a few tweaks I was able to get it moving.

I am the Cult of “Foamy”

Hello all:

I have been a member here at the Milwaukee Makerspace for about 15 months now.  One of my favorite things to do here is machine architectural reliefs from foam.  I studied architectural history extensively at UWM, so I have a lot of influences to draw from.

The first piece I did was 3/8″ deep, since that’s the bit we had at MMS.  I first tried a piece with all flat surfaces.  It turned out very well, so I tried another piece that has slanted roof surfaces; again, success, so then I did some searching and found a 1/2″ deep milling bit.  I did several pieces “on a theme”, taking the first one and making slight modifications. All of these designs are my own creations, I just daydream and think them up.

I have found that I can get 1/64″ details on these pieces.  I have recently started using 1″ deep bits, and the results are fantastic!  The best part is that the foam is really cheep-cheep-cheep, $25 for a big sheet at Home Depot!

My process is:

1) design in Solidworks (CAD)

2) Export to .STL file format

3) Import into Cut3D, where I generate G-Code

4) Load into Mach 3, the software that controls the CNC router.

5) Let the foam fly!

I started out on the MMS router, which uses leadscrews; my newer Zenbot machine uses belts, and is blazing fast.  I can now machine 8 times faster!  The largest piece shown here went from about 19 hours down to 2.5 hours.

My next challenge is to get small lines onto my pieces that will represent bricks/mortar, etc.  I’ll have to generate different code for that; the milling code runs in 3d, but the “bricklines” will need to be in 2d, so I’m looking forward to that challenge.  I’ll be using Vectric’s “Aspire” software for that.  More to come!

-MattN

 

MKE 3D Printing Meetup – August 2012

MKE3DP

Remember that 3D Printing Meetup we had? You probably read all about it. Well, people liked it, so we’re doing it again.

If you’ve got a MakerBot, RepRap, Mendel90, Solidoodle, Bukobot, Quantum ORD Bot, or some other oddly named CNC machine that spits out melted plastic, pack it up and join us… if you don’t know what the heck those names mean, but you’ve heard the phrase “3D printing” you can join us too, and we’ll answer all your questions.

We’ll be meeting on Sunday, August 12th, 2012 at 1:00pm. We won’t be at our space because we’ve partnered with our friends at Bucketworks for this one! Details are below.

Bucketworks
706 South 5th Street
Milwaukee WI

Note: This event is FREE and open to the public! Everyone is invited.

Laser Cut Safety Lock-Out Tags

Lock-out tags are used by factory workers to clearly identify broken or damaged equipment.  Milwaukee Makerspace is no exception.  A set of stop sign-shaped, 3″ wide, 3/16″ thick, red plastic tags have been created with the words “STOP – NEEDS REPAIR” in bold, white letters.  Tags are hanging over the first aid file cabinet by the light switches in the Workshop.  If you find a machine is out of service, please zip-tie a tag to the machine, preferably over its ON/OFF switch so people can easily spot it and refrain from using a potentially unsafe tool.