Welcome

This page is about my interests, projects, and profession (technical artist in the video games industry).  Most of my hardware\software projects are coded in PythonProcessing, Arduino, or MEL (Maya Embedded Language), in addition to 3d printing stuff on my Makerbot Replicator:  You can find my latest prints for download over on Thingiverse.

Speaking of Processing\Android\Python, you can link to my various programs\apps via the above title bar.

I also maintain several Mel\Python\Pygame\Processing wikis that I update far more often than this blog.  See them on their page.

All information on this site is copyright under the Apache Licence v2.0, unless otherwise noted.  Which means you can pretty much use the information here for whatever you like, but I always appreciate credit where applicable.

Have a look around.  Thanks for stopping by.

– Eric Pavey

Est. 1938

This probably won’t mean a lot to you if your house wasn’t build in 1938, but it was still a fun project. Modeled the plaque while I taught myself Autodesk 123D Design. Was designed with angles in mind for sand-casting, and the final result both printed and cast very well.  Printed on my Makerbot Replicator (1), the sand-cast with aluminum.  Now hangs proudly by my front door.

Download the stl and get print instructions over on Thingiverse.

Call Of Duty : Advanced Warfare

We’ve finally released the “reveal trailer” for our latest game:

Super proud of my whole team at Sledgehammer Games (and all the support from Activision) for everyone’s work on this.  Can’t wait for it to come out later this year!

CG model -> 3d printed -> metal cast: v2.0

Based on my previous post, I wanted to get better results from my sand-cast.  Things I learned from last time:

  • Even though I had a split mold, the vertical edges caused the mold to tear-out during removal.  I have a feeling this is due to the ‘ridged’ sides the 3d-printing causes, making the walls ‘grip’ more.  Because of this, I adjusted my 3d model to have slightly tapered sides.
  • The extruded text on my first model suffered the same problem as the above issue.  To resolve, I simply made the text extruded much less.
  • The previous split mold only had one anchor point, in the middle, to join the two sides:  When connected it gave more yaw-play than I wanted.  The new version has two anchor points on either side.
  • I watched a bunch of sand casting videos and read over multiple sites to make sure I got the sand cast itself created properly.

Based on all that, the end result turned out really nice:  Sprue cut off with saws-all, imperfections ground off with an angle-grinder, and polished with a Dremel:

sledgehammer2

Here’s a shot of it freshly pulled from the cast with the sprue still connected:

SAMSUNG

And here’s a shot of the 3d-printed two-part mold.  It took just under 4 hours to print on my Makerbot Replicator.  200 micron layer resolutoin, gray PLA, 220 deg C on a glass build plate covered in blue painters tape:

printedForm

And finally, here’s a movie of the furnace just before it was time to pour:

I shot it with bare hands:  I got really hot, really fast ;)

CG model -> 3d printed -> metal cast

castSHG

3D print on the left, aluminum cast on the right.

I’ve had a “dream” for a number of years now to model something in 3d, 3d print it, and cast it in metal.  Based on the upgrade from my “flowerpot furnace” and the acquisition of new sand casting greensand, today was my first successful attempt (once again casting my companies logo).  I’d previously tried my hand at some “lost PLA casting“, but the end results weren’t satisfactory.  And honestly I’d give today’s attempt a C- : Being my first attempt, I had some flaws in my sand cast design, that resulted in defects in the end result.  I also learned that if you want to pull off embossed letters like shown, you need to bevel them, or the sand will stick to them upon removal (which is what happened to the S & G) even if using parting dust.  Regardless, the cleaned up results with some black paint added gives it a rustic \ worn look.  Next attempt I’ll shoot for a solid B ;)

The print itself took about 2hr 15min on my Makerbot Replicator (1), using gray PLA, 200 micron resolution, printed on a glass build plate with blue painters tape.  It’s about 13cm across, or just over 5″.

 

Lost & Foundary “Model A” Furnace: First Melt

I finally decided to upgrade from my “flowerpot furnace” to something slightly larger, slightly faster, and quite a bit hotter:  the “Model A furnace” from Lost & Foundry.  Very pleased with it:  Fired right up, and I had molten aluminum 15 minutes later.  Next up, some real sand-casting.