23 May '15, 8am

Hackaday Fail: A $3000 Prototype That Doesn’t Work

[Dan Royer] is hard at work building his own personal robot army. Robots mean motors, and motors mean gearboxes. In [Dan]’s case, gearboxes mean $3000 wasted on a prototype that doesn’t work . Why doesn’t it work? He doesn’t know, and we don’t either. [Dan] would like to use small but fast DC motors for his robots coupled to a gearbox to step down the speed and increase the torque. The most common way of doing this is with a planetary gear set, but there’s a problem with the design of planetary gears – there is inherent backlash and play between the gears. This makes programming challenging, and the robot imprecise. A much better way to gear down a small DC motor is a hypocycloid gear. If you’ve ever seen the inside of a Wankel engine, this sort of gearing will look very familiar: a single gear is placed slightly off-axis inside a ring gear. On paper, it works. In reality,...

Full article: http://hackaday.com/2015/05/23/hackaday-fail-a-3000-proto...

Tweets

Hackaday Links: May 24, 2015

hackaday.com 24 May '15, 11pm

A few months ago, we heard about a random guy finding injection molds for old Commodore computers . He did what the best o...

For many of us, Bitcoin doesn’t make much sense...

forbes.com 30 May '15, 3pm

For most of us, bitcoin doesn’t make much sense. The cryptocurrency has been trusted for almost 200,000 transactions total...

#CAIR Doesn’t Think Our US #Military Should Be ...

gopthedailydose.com 23 May '15, 4pm

I'm not bashing man, I just think the far right has gotten a bit extreme. I feel the same about the left. I'm a tad Libert...

Hackaday Prize Entry: Biopotential Signal Library

hackaday.com 23 May '15, 5am

With prosthetics, EEG, and all the other builds focused on the body and medicine for this year’s Hackaday Prize, it might ...

Do Work #golfer #golfing

bunkershot.com 29 May '15, 11am

About this site Online Golf Magazine featuring golf news, photos and videos Find us on Instagram Follow @BunkerShotGolf Ab...

Hackaday Prize Entry: A Broke Hackers’ Model Train

hackaday.com 22 May '15, 5am

Model railroads are the wellspring of hacker culture; the word itself comes from the MIT Tech Model Railroad Club sometime...

We have a bunch of open positions! Come work wi...

name.com 02 Jun '15, 2am

Name.com is a fast-growing company dedicated to making the internet easier. From simple user flows to the best customer se...

Hackaday Prize Entry: Arduino MPPT Controller

Hackaday Prize Entry: Arduino MPPT Controller

hackaday.com 24 May '15, 5am

Imagine you’re building a small solar installation. The naive solution would be grabbing a solar panel from Horror Freight...

Hackaday Prize Entry: The Chocometer

hackaday.com 25 May '15, 5am

Diabetes affects almost 400 million people worldwide, and complications due to diabetes – blindness, cardiovascular diseas...

Hackaday Links: May 31, 2015

hackaday.com 31 May '15, 11pm

Back in the mid-70s, [Paul Horowitz] (who has an incredible Wikipedia entry , by the way) started teaching Physics 123 at ...

Speed work during base training can cause more ...

runnersworld.com 26 May '15, 12pm

[SPEED WORK DEFINED: For this article, speed work refers to reps performed at your VO2 max pace (pace for an 8- to 10-minu...

Faradion Electric Bike: Prototype Powered By Sodium-Ion Batteries

Faradion Electric Bike: Prototype Powered By So...

greencarreports.com 24 May '15, 12pm

By Stephen Edelstein 54 views May 24, 2015 Reddit This! Share on Facebook Share on Twitter Faradion prototype electric bic...

Rain doesn’t put a damper on #NewYork #SchoolBus competition: @NYSBCA

Rain doesn’t put a damper on #NewYork #SchoolBu...

schoolbusfleet.com 26 May '15, 7pm

VALLEY COTTAGE, N.Y. — The top finishers have been named in the 44th Annual New York State School Bus Safety Competition ....