Will's Blog

  What follows is documentation for my home network VLAN configuration. An LLM was used to help with terminology. My focus is generally focused on the intent and sometimes that is misaligned with the common technical terms used to communicate some particular implementation. The machine is great at making that type of translation. Why do you want a VLAN?   Unless you're well versed with layer 2 networking, setting up a VLAN network is quite a tedious, so there had better be a good reason to set this thing up. I have a few reasons: Security:  I'm interested in setting up various cheap IOT devices for home automation, but I don't trust them. Putting them on a separate VLAN minimizes how much damage can be done by a rogue device.  Priority:  I also have IP Cameras generating a lot of traffic. I'd like to see how much traffic and have a way to lower its priority. More security : Any employer-managed device goes on a completely isolated network. Fun:  What ...

It has been about a week since my OrdBot's first successful calibration print and it seems like a good time to write down some of my initial problems, experiences and solutions. However before I get into that a review of my 3D printer stack. Hardware OrdBot Hadron 3/8"-12 TPI ACME Z-Axis screws 1.8 degree Nema17 X/Y motors 1.8 degree Nema23 Z motors Qu-bd MBE Extruder (with some modifications) Electronics AzteegX1 v1.0 ( 644P processor) Lava heatbed, I have only used PLA at this point so this is still disconnected. Software Mac OSX Marlin firmware Slic3r v0.9.9 Pronterface (March 2012 release) Repetier-host Mac (0.56, lower versionthan linux/windows releases for some reason) Now for the problems encountered during the past week, approximately in the order which I ran into them. Pololu A4988  - I have used these before on my ShapeOko CNC machine. They have been so reliable that I completely forgot how to set them up, as such I blew up 3 drivers while sett...

I've been a fan of MakerSlide  ever since building my ShapeOko CNC Mill , and have been interested in 3D printing since first hearing about the RepRap project in 2007. So when I first saw the OrdBot, I knew that it would be the printer I build. It didn't hurt that I had 10 feet of extra MakerSlide and a whole bunch of the special bearings and eccentric spacers left over from my ShapeOko build. One of my goals was to build all the custom parts myself, the blue and black pieces in the photo above. Cutting aluminum on my new CNC machine pushed it to the limit, but worked out in the end. One of the larger OrdBot pieces is the handle, here is a shot of the ShapeOko making short work of it: There are a couple parts that I modified or upgraded during the build. Most notably the Z axis. After reading about bent Z-rods I decided to get some ACME rods, and I wanted to use some spare Nema-23 motors that I had on hand. The NEMA-23 motors for the Z axis were easy, I slightly modi...

April of 2012 I signed up for the first batch of ShapeOko kits from inventables.com. Unsure of how popular the kit would be, inventables had a kickstarter-style order of 150 (or so) kits. That number was reached handily and several more batches followed. Since then the ShapeOko has become a standard item in their store. I've wanted a CNC mill for a long time, but could never justify the expense. Now there are products like the MakerSlide linear rail system that made it possible for low cost machines. The first round of kits were only $200 for the entire mechanical platform - add your electronics and a dremel tool and the machine can start cutting. So thats what I did. The stock kit plus motors after assembly: One of the nice things about the ShapeOko is how hackable it is. For instance if you want to make the cutting area larger you can just replace the MakerSlide with longer rails. So I added longer rails, a second Y-axis motor, a torsion box to mount everyth...

In 2009 I took a week off from work to build an  Automatic Cat Feeder  to ration food to the overweight household cat. This was a project built from need and it had a deadline because my girlfriend and I were heading out of town for Thanksgiving. The requirements were simple: It needed to be easy to refill and dispense the correct amount of food twice daily. Early on I had an idea for a large rotating drum to dispense the food, it needed to be easily removable for refilling and heavy enough that it could sit on a motorized wheel and cause enough friction to be turned. Figuring out a latch mechanism that dropped the correct quantity of food after one rotation was the first tricky part. I didn't want any electronics on the drum so it had to be completely mechanical. In the end I hot glued a small box to the outside of the drum which filled during rotation, when it started moving back towards the top a tab would be hit to fling a door open and drop the food out. A magnet hel...

I've had many projects over the years, the most involved by far has got to be my DIY projector.  It is also my first serious project. By the end of it I had vastly improved my knowledge of optics, electronics, woodworking, and even a little thermal dynamics. Research started sometime mid 2007, the now defunct lumenlab forums had a whole community of people building DIY projectors. There is a lot of theory to learn, optics to figure out, components to buy, and bringing all the pieces together is no simple task.  For such a complexe machine, at the core it has some very simple principles: A point light source radiates light into a fresnel lens, which straightens the light through the LCD screen, then another fresnel lens angles the light into a special lens which can focus the light on a screen. Here is an image from engadget which demonstrates the light path: The major problem with these sorts of projectors is that they tended to be very large. 1080p monitors at the...

This is a short essay about why I decided to create " Hydrate Yourself ". It is a free app for the iPhone, iPod touch and iPod which tracks water intake and helps encourage a healthier lifestyle. According to webmd.com [ 1 ] and the US National Library of Medicine [ 2 ], symptoms of dehydration include: Dizziness, Lethargy, Lightheadedness, Headaches, Fainting, Weakness and (naturally) a Dry mouth. Other symptoms even include heart palpitations (that feeling of your heart jumping or pounding). So why is it that water intake is such a secondary concern to so many adults? All it takes is a little attention throughout the day, such as keeping track of how much water you are drinking or carrying a water bottle with you at all times. I strongly believe that drinking enough water is one of the easiest ways to improve your health. But how much water is enough? Its hard to say, since so many foods we eat every day contain water. Common "rules of thumb" include 8-10 gl...

I started working on a new project the other night.  It took most of the night but the proof of concept looks promising.  Take a look at the video below, follow the link to flickr to see it in HD.

Sometime last year I started kicking myself for missing the mass exodus of the card catalog.  I came to the obvious realization that these giant dressers full of small drawers would be perfect for storing small tools and parts.  Not only do they have a nice size but they're built like tanks, they're meant to be opened and closed all day long after all. Well I finally have one, and it has been converted ever so slightly to be usable for storage. It is on the small side, with only six drawers: All that was really needed was to cut some rectangles from a sheet of hardboard and tack them in place with hot glue: I can't complain about the results though, I still need to make new labels though:

Today was Free Day at SparkFun and like many geeks around the world I had a shopping cart prepared in advanced (last night to be specific). At 11AM EST the floodgates were opened and the SparkFun servers ground to a halt as thousands of people attempted to claim a $100 prize.

Took the first steps on a new project, an automatic cat feeder. The plan is to have it completed by Thanksgiving so that the cats have something to eat while I'm out of town. That being said, I cut the pieces for the box out of some 1/4" MDF and have a lot of work to do.