Working Micro Gear Heart Keychain
by CrazyJaw, published
This version is about half the width of the original (50 mm), which means its 1/8 the volume and a much faster print (yay math!). i find it takes me ~2 hours to print one (and ~8 for the original)
Rather than just being a straight scaling, this version has been tweaked so taht it will still rotate. The main differences are the number of gear teeth (much fewer, and larger), gear ratio (it now takes 2 rotations to realign, unfortunately) and pins (made much beefier, and they are all one length).
Additionally, there is a hole through the tip so that it can serve as a keychain! Print them out by the dozen and give them to friends/family/cute girls on the bus!
== Edit 6/10/2012 ==
Added a zip of the source plus .stls for every individual component.
Added a "full plate" that prints all the gears + center. Left the pins out, since you usually want to print those with different settings. Fits on a replicator (not sure about others...)
== Edit 6/16/2012 ==
Added a chain connector to gear1 (the top). Updated the src rar (and fixed a compilation bug).
== Edit 6/19/2012 ==
Fixed the length of the pins. Shorted now, so gears should be less wobbly.
Recent Commentsview all
I was so curious to try my brand new Replicator 2 that I've missed the comments to the thing. This resulted in waste of plastic for 10 pins originally included in this model :D It is impossible to fit them. The print was made using PLA. Will try these little fellas tonight: http://www.thingiverse.com/thi...
Your awesome gift idea was featured in the latest Fused News episode about 3D printable valentine presents. You can check it out here - http://www.youtube.com/watch?v...
yeah the pins were designed around ABS, which has a tendancy to shrink (pla doesn't). LittleDangerous has a derivative that takes care of that though: http://www.thingiverse.com/thi...
Liked Byview all
Give a Shout Out
I've included the a zip of stls for each individual gear as well, along with the modified source openscad file.
I used a raft with .2 layer height, 10% infill and 50mm/s feed rate for the two plates. The center prints fine without a raft.
The pins are the key to getting the damn thing to actually rotate. Use a "multiply" profile to print the 8 pins necessary. I actually usually print 10 in a go, since usually one or two will have some flaw that makes it too loose to work correctly. The best settings I've found is to use a .3 mm layer height and 100% infill.
Then, just make sure you do a quick sand of the gears where they contact the center, and trim off any little protrusions that may be on the gear teeth (these can cause the gears to skip).
The largegearplate and fullplate have the keychain hole on the 8th (bottom) gear. You can separately print "keychaingear1" if you want the keychain connector up top
You must be logged in to post a comment.