Build Your Own Butler Robot!!! - Tutorial,Photos, and Video

Step 2 Building the Chassis

The first step to building a butler robot is to construct a chassis.

The chassis is probably the most important part of the robot. If this fails than the entire robot is practically pointless. This is the foundation of the robot. The chassis is the mode of transportation of the robot.

For motors I decided to use preowned wheelchair motors since they were pretty cheap ( ~$70 on eBay) and since they can handle a very heavy load .

What to ask when buying a wheelchair motor:

• Do the motors actually work?
• Do the motors come with wheels attached?
• Do they draw more than 15 amps per hour?
• Do they have too high RPM? ( this is relative to your application )
• Do the motors have bad gears that make a lot of noise when turning?

RPM stands for revolutions per minute. Now lets examine that further. That means that at 1 RPM a 12" wheel will turn exactly once , which also means that the wheel traveled 12". Now if that number was higher , say 60 RPM , then that would mean the robot would travel 12" per second. Now for me thats too fast , but it all depends how fast you need it to go.

Comments

[masterj]

or this ...http://cgi.ebay.com/Rear-Wheel-Drive-Motors-Merits-MP3C-Electric-Wheelchair_W0QQitemZ260265254320QQihZ016QQcategoryZ19265QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[masterj]

would this work ... plz reply soon ...
http://cgi.ebay.com/PRIDE-JAZZY-ELECTRIC-WHEELCHAIR-MOTORS-POWER-WHEELCHAIR_W0QQitemZ170241151899QQihZ007QQcategoryZ19265QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[Unit042]

I don't mean to split hairs, but it's revolutions per minute:
http://en.wikipedia.org/wiki/Rpm

[Erobots]

you caught me I edited it now, revolutions is more accurate technically I was right though , because rounds can mean "Movement around a circle or about an axis." But you were more right , so I put that in now.

[Unit042]

Rounds are perfectly acceptable, I just can't resist stirring up trouble. Heehee. Nice robot, although I would never have the guts to do a built-in fridge. Mine would be more like an R2D2 with flamethrower and explosive self-destruct mechanism. Think: mobile turret and armory.

[Erobots]

lol sounds very "safe" I would like to build a cool mech one day... wtih flamethrower but NO self destruct ( why would I want to blow that kinda thing up) :)

[Unit042]

Well, the self destruct is to prevent theft. When the robot detects that it's being stolen, it blows up, killing the criminal who would have gone back for more stuff from your house. And it destroys any possibility of "Them" finding any criminalizing evidence inside the robot, er... crack *ahem*... cocaine...*cough*... weapons grade plutonium stash... *The guy next to me said it!* etc.,
but you didn't hear it from me! ;-)

[Erobots]

LOL that made me smile an even better way would be to just kill the criminal without blowing up

[Unit042]

That would be nice, but then there would be evidence left over, with your fingerprints on it, that just killed a guy! How about ninja star throwing?

[Erobots]

I meant have my butler robot incapacitate him , lol

[Kopolis777]

50000 volts should do the trick

[Unit042]

*Mischievous smile sneaks upon face, mirroring the equally, if not more trouble making thoughts of the recipient of the above comment's implications...*

[Erobots]

hmmm I'm thinking of using maybe a bug zapper on Chives, not to kill just to give a nasty burn and scare people off

[Erobots]

lol yea if you want to be technical thanks for catching my mistake , I'll edit it now Hope you enjoy the rest of my tutorial!