I was curious to know if the printer could handle tight tolerances to nail the spacings between 0.4-Module metric gears.
Great news–they can–resulting in a nicely-boxed test transmission!
The gears are servo-replacement gears for a very large servo, a trick inspired by @James_Best on his combat robot post.
More details and parts are on the blog post.
Aye, printing gears would be phenomenal. if we can counteract the slight warping on prints and print with a slightly less brittle material, it might not be too far out of reach…
I considered mixing carbon fiber chop or microballoons to resin for added strength, but I havent had the courage to take the plunge and get a resin rank and resin to exclusively test this idea.
Have you considered following @Steve_Johnstone’s molding techniques? He has some videos on YouTube about this.
I’d consider creating masters (positives) of the gears, then creating negative molds, then casting a resin mixed with carbon flock or something.
Check these links out. Tons of ideas and resin recommendations for cast gears (also: the links are all related):
http://lcamtuf.coredump.cx/gcnc/ch4/
http://lcamtuf.coredump.cx/rstory/
http://makezine.com/2014/03/21/resin-casting-going-from-cad-to-engineering-grade-plastic-parts/
Try Maker Juice SF. It’s available in a “starter” bottle of 500ml. It’s been working really well for me. And the prints are much less brittle than the FL resins. And I print a lot of small stuff, where the difference is more meaningful…
Thought I’d share this print of a worm-gear 
Woo combat robots! Something I know only too well about, been involved for a good 12 years now 
