Tag Archives: thingiverse

Printrbot Z-Axis Knob, Refined

I find myself adjusting the height of the Z-Axis on my Printrbot Simple with every print, sometimes during the print itself. Handling the leadscrew directly can get a little uncomfortable, so having a knob attached to the top of the axis helps a great deal.

Printrbot Z-Axis Knob

downloadThis knob is based off Bill Owens’ Printrbot Simple Z-Axis Knob which is in turn based on jridley’s Parametric hex head screw or nut knob. Circle of LIIIIIIIIFE

This version has some rounded edges for comfort because I’m a delicate desert flower that only blooms once a year and I must preserve my girly hands for stroking my Shih Tzu.

Did you hear about the new zoo that opened in Chicago? It’s only got one animal: a dog. It’s a Shih Tzu.

This knob also has some transitional elements between the two major volumes, and a graceful inverted flare on the shaft. These are completely unnecessary aesthetic changes to the perfectly-usable model made by Bill Owens, but since complexity is free in 3D printing, why not.

Here’s a perfect demonstration of how the Creative Commons license fosters creativity. First, in need of a knob, jridley throws together a parametric design and shares it on Thingiverse. Now anyone can adjust a few numbers and get a printable knob.

Standing on the shoulders of that giant, Owens refined the basic design until he got a knob he could use in his particular situation. He puts it up on Thingiverse where dozens of Printrbot Simple owners download and start using it.

I don’t know much about OpenSCAD, the software jridley used to design the original knob. But I can take the output into software I’m familiar with and edit the geometry to fit my needs.

All legal, all free, no ethical quandaries or patent fights. All we have to do is give each other credit where credit is due.

I found Owens’ knob to be a little loose given the crop of nuts grown in my part of the world, so this model might be a little tighter or looser for you.

You will need a pair of 5/16″ nuts to use this knob properly. Put one nut on your z-axis leadscrew, attach the knob, and then tighten the second nut.

The model is also available in The Forge along with assorted other baubles.

/dev/random : Midwivery

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I get teh feels that 3D printing at home has advanced to the point where we’re experiencing the same birthing pangs that desktop publishing did in the early 90’s.

This too, shall pass. Unfortunately, we’ll soon enter the period where ease of use means that Aunt Mary designs and prints you a coffee cup with your siblings’ headscans bulging out of it like Dead Space necromorphs.

Actually, I’d kind of like one of those.

/dev/random : No instructions provided

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I’m moving the comic to Sunday-only for two reasons. One, I feel like I’m spamming myself by posting comics three times a week.

Two, the vast majority of comics generated by the script just aren’t funny. My code generates one comic every ten minutes, so over the course of a week that should be over 1000 comics to choose from. One of those has to be amusing. But three?

Anyway, hipsters are always a good punching bag, even if they’re a bit past their humor sell-by date in 2013.

The grody code at the beginning of Character 1’s speech balloon shows that my HTML filter isn’t quite catching everything the new Thingiverse throws out there, so I’ll do a little tweaking this week and take care of that.