semi-completely printable Spherebot
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Published on March 11, 2012
Description
UPDATED 03/07/13 - thank you to all who "liked" my project, but if you are serious about building one, you really should consider building this one: thingiverse.com/thing:20398
It's a great "Thing" and is complete. A year later I went back to build mine and found it to be incomplete
This is my version of a semi-completely printable spherebot drawn using google sketchup.
I started out with the intent to make it completely printable, but Easter is coming and at the rate I'm going, I would be lucky to have it done in time for drawing on Christmas ornaments,so I've abandoned the "completely" printable part and used 1/4" rods for the frame and M3's for mounting the steppers and 5/16 bolt for the egg cup holder.
If you download the "Spherebot all files" file, you get the sketchups, STL's, Gcodes all in one
I have printed it as seen in the pics, however, I have already detected a potential flaw in that I'm only using 3 1/4" threaded rods for the frame and that missing 4th corner is causing my egg to skew a bit when mounted. My problem is, if I add a 4th rod, it interferes with the position of the pen ...
I think I can work around the 4th corner missing so I've spent most of my time trying to figure out what's wrong with my wiring cause the best I can get is the egg spinning and the servo lifting/dropping the pen ...
It's a great "Thing" and is complete. A year later I went back to build mine and found it to be incomplete
This is my version of a semi-completely printable spherebot drawn using google sketchup.
I started out with the intent to make it completely printable, but Easter is coming and at the rate I'm going, I would be lucky to have it done in time for drawing on Christmas ornaments,so I've abandoned the "completely" printable part and used 1/4" rods for the frame and M3's for mounting the steppers and 5/16 bolt for the egg cup holder.
If you download the "Spherebot all files" file, you get the sketchups, STL's, Gcodes all in one
I have printed it as seen in the pics, however, I have already detected a potential flaw in that I'm only using 3 1/4" threaded rods for the frame and that missing 4th corner is causing my egg to skew a bit when mounted. My problem is, if I add a 4th rod, it interferes with the position of the pen ...
I think I can work around the 4th corner missing so I've spent most of my time trying to figure out what's wrong with my wiring cause the best I can get is the egg spinning and the servo lifting/dropping the pen ...
Instructions
I guess most people will not be able to print the full set in one session. I can't do it on my Prusa Mendel. But one way or another, you'll need to print the 2 sides (stepper side, bearing side) and the back as well as the egg cups from thing:13960 and use the pen holder from thing:7988 (Thanks and kudos to rrhb and berserker for their great work on which this is based. Not to mention zaggo (thing:7656)
I cut 1/4 rod at 7" lengths, then threaded them thru the stepperback.stl and then attached the sides. This is a pain because you have to spin the threaded rod with your fingers. In retrospect, it's just better to use smooth rod cause the holes will fit tight enough to hold in place, but then, I'm not the brightest star in the galaxy.
I used a 5/16" bolt and a skateboard bearing on the one side of the frame
Now, if I can figure out why my electronics don't want to do what I want them to do...
anyway, I hope you enjoy it and if you get one working, let me know cause I'd sure like to see someone be successful. OR if you improve this design and goodness knows that should be easy, let me know and I'll use yours.
I cut 1/4 rod at 7" lengths, then threaded them thru the stepperback.stl and then attached the sides. This is a pain because you have to spin the threaded rod with your fingers. In retrospect, it's just better to use smooth rod cause the holes will fit tight enough to hold in place, but then, I'm not the brightest star in the galaxy.
I used a 5/16" bolt and a skateboard bearing on the one side of the frame
Now, if I can figure out why my electronics don't want to do what I want them to do...
anyway, I hope you enjoy it and if you get one working, let me know cause I'd sure like to see someone be successful. OR if you improve this design and goodness knows that should be easy, let me know and I'll use yours.
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License
semi-completely printable Spherebot by devtty1 is licensed under the Attribution - Creative Commons license.
More from devtty1
Nice thing. I did a similar bot, but used my woodshop to make most of the parts since my mendel's extruder is beoken right now.
My bot does jaggy diagonals, which I've been trying to figure out why for the past 2 weeks. Did you get your electronics squared away? mind sharing details of your electronics setup?
Thank you. I designed these parts using the dimensions from Berserker's drawings for cutting it out in wood.
Sorry, I never did get my electronics working. I was using an arduino UNO with 2 pololu stepper drivers
I sold off this build and moved back to my reprap mendel build which is close to being done. electronics on it are working great but that's probably because I didn't do any wiring myself (Ardu
ino MEGA with RAMPS 1.4)
good luck with your bot and let us know if you get it working cause others are/will have the same problem