Archive for the ‘ CG ’ Category

Latest 3D Print – Endangered Species: Rhino

I got the idea to model the bust of a rhino, and print it in a “wireframe” style like I’d done with previous designs. This one is produced with a different wireframe creation technique however, where I instead generated blobby particles along the polygonal edges, and converted the results back into polygons.

I tried to minimize overhang issues by tracking the angle of the edges via a Python script in Maya. Very little cleanup was needed after print: No raft or support material needed.

The frame is actually a pattern I drew on some scrap MDF (nothing 3d printed there) , jigsawed out, and then routed the edges plus slapped on some white paint. Print is affixed via epoxy.

Stats:

  • Successfully printed in “natural” PLA on Makerbot Replicator.
  • Sliced using Makerware, “medium” settings:
  • 2 shells, 10% infill, 210 deg extruder, HBP off.
  • Printed in 4hours, 41min, and weighs in at 52g… which worked out to a material cost of $2.29 (not counting shipping…).
  • Print size at the neck is about 3″ wide, 4″ high, close to 6″ long from neck to nose.

You can download the stl file over on Thingiverse.

Latest 3D print: Geo Bracelet

Modeled in Maya while sitting at a coffee shop near Stanford (man did I feel like I fit some sort of stereotype). After working on “Geo Necklace“, I wanted to try something slightly more complicated. This “bracelet” is two combined tori: The base is 8-sided, the top is 6-sided. No overhang issues, but I did have to pick out some interior loose filament. Spray-painted it two-tone blue/red.

Stats:

  • Printed on Makerbot Replicator.
  • Successfully printed in ‘natural’ PLA with “medium” settings in Makerware:
  • Extruded at 210 deg, HBP off.
  • 2 shells, 10% infill (presuming there is any infill at al).
  • Took 50 minutes to print, used 13g of PLA.

You can download the .stl file over on Thingiverse.

Latest 3d print: Geo Necklace

I recently ran across a post showing what looked like (to me) “low poly wireframe 3d-printed jewelry”.  Inspired me to try something similar on my Makerbot Replicator.  Half an hour of modeling later in Maya, 51 minutes of printing (PLA), and I came up with the below design.  Just a conceptual prototype of what could be in the future.  I spray-painted it two-tone black\red so that it could be reversible.  My lovely wife graciously let me photograph it on her neck:  Wouldn’t fit on mine ;)

Download the .stl and get other info over on Thingiverse.

New 3D Print: GeoLight

One of the reasons I picked up the ‘natural’ (semi-transparent) PLA is to experiment with lighting designs.  In my head, I like the idea of printing out geometric shapes and seeing light filter out of them.  This print was my first attempt at creating a ’3d-printed lampshade’.  First, pictures:

Interesting things to note in the above pics:  The bottom left pic shows how support material is generated to help with printing ‘overhangs’.  The bottom middle picture shows me beginning to break out the infill material from the inside of the print.

Datapoints:

  • Modeled in Autodesk Maya.  I wrote a Python script to help me auto-constrain polygonal platonic-solids to a hemispherical NURBS surface to get the overall shape.
  • The inside diameter of the top hole is about 3.5cm :  This gives a nice friction-fit to the threaded light socket I picked up from Home Depot.
  • This is the first time I’ve printed with support material.  Probably contributed to the 26 hour print time on my Makerbot Replicator.
  • I had the printed plugged into my Kill A Watt:  It used 1.63 kWh of juice to print.
  • I plugged a 40watt halogen bulb into it, and left it on to make sure it wouldn’t melt….  It did.  I came back in a few minutes later with the bulb completely melted to the print.  I was able to get the bulb out… and there’s no visible damage on the outside… but I’ll have to sand down the hole to get a new bulb in there.  In the future, I’ll either use a LED bulb (far less heat), or do a re-design to make the interior space… larger.

Overall it was a good first experiment into the world of lamp-shade design.   You can download the stl files over on Thingiverse.

New 3d print: ‘Decorative Bowl’

I got it in my head to try a ‘simple bowl’ print, and generated the below model in Maya.  It started out as NURBS, I slapped a lattice on it to get it into the desired shape, then converted it to polys for export.   It’s about 4.5″ wide, 5.75″ deep, and 2.5″ high.

The final product I painted two-tone with spray-paint:  The outer shell is a rubberized spray, I wanted to see how much it would ‘fill in’ the printing ridges.  After four coats, it had just started too.

The inside was sprayed with a bright cherry red.  None of the surfaces were sanded, but I think I’ll try that finishing method on the next one I print.

The whole thing took a bit over seven hours to print on my Makerbot Replicator.

You can download the .stl for printing from Thingiverse.