Archive for ABS filament

Metal filler works wonders with ABS filament

An as-yet-untitled 3D printed fine art sculpture by Phoenix artist Kevin Caron.Since I moved my 3D Systems CubeX 3D printer down to the studio, I’ve been able to play with it while I’m in the office cooling down – Arizona summers are really brutal when you work with fire and wear heavy protective gear. The CubeX gives me another way to play that keeps me under 1000 degrees.

One reason I hang onto this old 3D printer – it was the first one I owned – is that it prints ABS (acrylonitrile butadiene styrene) filament (the same stuff used in Lego bricks), which is petroleum-based. Although I mostly print in PLA (polylactic acid), ABS lets me do some things I can’t do with PLA.

In particular, it lets me print the two forms shown in this post, which my deltabot printers’ software just can’t seem to handle. The CubeX software can handle the thin edges better and print pieces without supports, which means much far less clean up. It also lets me use a filler that PLA probably wouldn’t put up with.

Accordingly, I decided to create these two forms for an upcoming show. I knew they wouldn’t print perfectly, though, so some body work was in my future ….

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The Strange Case of the 3D printed Geared Ball

Geared sphere - 3D printed by Kevin CaronIf you read my last blog post, you know I’ve been playing around with some cool designs from Thingiverse.

Both are geared – one is a cube, the other a ball. You can see me playing with them in that last blog post – several people have remarked they are like a modern Rubik’s Cube. I’ve taken a geared cube to events and people just can’t stop handling it.

Lately, I’ve been having fun enlarging the designs to print on my 8-foot-tall Cerberus 3D Gigante 3D printer, something that was a whole lot harder than I thought it would be – it isn’t just a matter of scaling up mathematically.

I’ve also been adding stripes to cubes while printing (another good reason to check out last week’s post to see me manipulate one).

But the point of this post is the strange thing I discovered after I printed the large black geared ball (right) ….

When you 3D print a geared cube, you print all the pieces at the same time. With the geared balls, you print all nine pieces – four large ones, four small ones and a middle – separately.

Difference between PLA and ABS 3D printed filament - Kevin CaronUsing my 3D Systems CubeX 3D printer, I had printed six of the pieces in black ABS filament for this 5″ geared ball when I realized I wasn’t going to have enough to print the last three pieces.

So I found some black 1.71 mm PLA filament, which is what the CubeX runs, and figured, “What the hell – filament is filament.”

After the last three pieces printed, I bought some 1/4 x 20 Allen bolts to assemble it, just as I’d done with a 2-1/2″ gray version I’d printed earlier.

But the black geared ball just wouldn’t go together. It probably took me two hours to assemble the gray one, but the black one probably took me three.

Finally, I realized that the three pieces I printed in PLA resin were slightly larger – the photo at right shows one of the smaller pieces protruding slightly.

I’d heard that PLA resin shrinks less, and this seems to prove it.

I want to try playing with this some more, comparing PLA to ABS, but since I finally got the black geared ball together, I’m happy for now.