{"id":3756,"date":"2013-08-19T16:52:45","date_gmt":"2013-08-19T21:52:45","guid":{"rendered":"https:\/\/www.keegan.org\/reprapblog\/?p=3756"},"modified":"2013-08-19T16:52:45","modified_gmt":"2013-08-19T21:52:45","slug":"four-no-32-months-part-13-of","status":"publish","type":"post","link":"https:\/\/www.keegan.org\/reprapblog\/archives\/3756","title":{"rendered":"Four, no, 32 months.. part 13 of ?"},"content":{"rendered":"

Flying along trying to catch up on my year-and-a-half-behind blog. Today is August 19th 2013 and I’m describing events starting from February 26th of 2012. Maybe I’ll make this one short. Ha!<\/p>\n

(This will sound like a bunch of detached unrelated paragraphs, because it is).<\/p>\n

First up, at the New England RepRap 2012 meetup that I talked about in the last post<\/A>, I tried again at printing the Hemi-demi-sphere.<\/p>\n

Here’s a comparison of the old failed ones that I’d tried printing before (on the left) and the new excellent ones that I printed at the meetup (on the right):<\/p>\n

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Here they are assembled. Obviously, the new ones are on the top:<\/p>\n

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Here’s a closeup of the good one.. Looks like a baseball:<\/p>\n

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A coworker had asked me once long ago if you could just print anything on thingiverse – why didn’t I just go print this Debian logo, for instance. I finally got around to it at the meetup, and gave it to Tim later:<\/p>\n

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Later some of us at work were trying to motivate ourselves to work on some project, and tangentially it lead to me picking one print from thingiverse (a “protobot” – a small arduino-based robot with a breadboard on it) and saying “guys if we can’t come together and build, say, THIS, in just a few days, then something else is wrong..”. So we divided up tasks (I did the printing from home), and got it built in about a day or two, tops. Little did we realize at the time that the object it was derived from was done by a bunch of boy scouts for a merit badge, so if we failed it was laughably embarrassing that we’d be beaten by a bunch of kids.<\/p>\n

The frame (x2):<\/p>\n

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Other parts:<\/p>\n

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The wheels (you put large o-rings around them):<\/p>\n

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These really remind me of the reel-to-reel tapes that we used to use on our old old old tape recorder when we were kids:<\/p>\n

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Here are the parts laid out:<\/p>\n

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..and then they were ready to take into work (I didn’t have a 3D printer on my desk at the time):<\/p>\n

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One of my jobs was to get the servos, so I stopped by a local hobby shop and picked these up:<\/p>\n

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Then we got it working and doing simple movement!<\/p>\n

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Woohoo!<\/p>\n

Ok back to my RepRap. I printed out some more heart boxes..<\/p>\n

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And then I printed another “K” block:<\/p>\n

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I tried printing a small twisted bottle (thing:12278) but it failed, I’m guessing at least partially because I had no fan:<\/p>\n

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One of the things I’d wanted to print for a while was a tool for my mini-lathe that would let me hob bolts on my lathe (I’d done it before with a tap in a drill, but I’d rather do it on my lathe now that I had one). The only downside is that my lathe is a mini-lathe (7″x12″), and the largest tool it can handle is 5\/16″. So I took one of the good looking tools out there and modified it to fit on my mini lathe (while writing this post I finally uploaded my modified version to thingiverse: Bolt Hobbing Tool for Mini Lathe<\/A> ).<\/p>\n

Here is my lathe tool to make hobbed bolts (modified to fit my lathe):<\/p>\n

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Here is video showing me hobbing the bolt:<\/p>\n