Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: ruffntuff007 on January 15, 2008, 08:19:13 AM

Title: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 08:19:13 AM: hello friends,

i am making a autonomous path follower and obstacle avoider, i want to use two servo/dc motors for two back weels and want to just attach a caster wheel for front wheet. so having a bot with three wheel , is any problem ?? what type of body should i build ????? ??? ???
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 08:34:38 AM: OK first

what do you mean by path follower? what is the path?

three wheel bot is no problem.

I would recommend using HDPE for the material, buy it from McMaster

also what microcontroller will you be using? and what is your budget
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 08:36:17 AM: i have 4 friends to contribute. i already have bought a pic development board. going to programme it soon. where can i find hdpe ?
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 08:37:06 AM: Quote from: ruffntuff007 on January 15, 2008, 08:34:50 AM
hello friends,

iam making a path follower and obstacle avoidance system.i am new to robotics, i want to use two dc motors for two rear wheels and a caster wheel in the front.So my bot is having two motors and a caster wheel,total three wheels. Is my idea good enough to proceed ???
Don't double post

Quote from: ruffntuff007 on January 15, 2008, 08:34:50 AM
an any one tell me how to connect wheels to a motor ???

a regular motor or a servo . And also which exact motor and which exact servo
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 08:38:35 AM: as I said before McMaster.com

Also I would first build the robot and then program it. :P

Also, what is the path that it is following???
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 08:43:39 AM: the path is like B shape
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 08:46:39 AM: its a servo hs-35 ,torgue 4 kg . now can u please tell me how to connect wheel to that motor ?? wheel would be of radius 2.5 cms.
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 08:47:06 AM: a black electrical tape line?

lol

what is the path? out of what material , what color , what terrain NOT what shape
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 08:48:11 AM: here is a link on how to connect a wheel to a servo

lol, search google :D

http://www.kronosrobotics.com/an118/GAN118.shtml (http://www.kronosrobotics.com/an118/GAN118.shtml)
Title: Re: autonomous path follower and obstacle avoider
Post by: Rebelgium on January 15, 2008, 08:49:47 AM: Do some research before you ask questions like if three wheeled robots are ok.
The forum is FILLED with info on three wheeled robots...
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 08:52:16 AM: the path is a track of 60cm wide . its a flat surface,wood made
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 08:53:01 AM: thanku :)
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 08:56:19 AM: Quote from: ruffntuff007 on January 15, 2008, 08:52:16 AM
the path is a track of 60cm wide . its a flat surface,wood made

what color?
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 09:07:28 AM: black colour track 60 cm wide aooden surface absolutely flat . do u have any pics of three wheeled bot ?
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 09:12:11 AM: search GOOGLE!!!!

here is a robot that admin made : (http://www.societyofrobots.com/images/mobot2007_bottom.JPG)

I am working on a robot with two wheels and two casters, basically just for balance and to make room for my line sensors

Do you know how to track a line already?
Title: Re: autonomous path follower and obstacle avoider
Post by: ruffntuff007 on January 15, 2008, 09:18:00 AM: actually one of my friend is dealing with the programming part. i have taken the job to design chasis and essembling. do u have any other pic with a more of front look ???
Title: Re: autonomous path follower and obstacle avoider
Post by: airman00 on January 15, 2008, 10:03:20 AM: just search google for it , i am not going to

how will you be doing the sensors part?
Title: Re: autonomous path follower and obstacle avoider
Post by: bukowski on January 15, 2008, 10:27:57 AM: If you want something cheaper than an omniwheel, you could also go with a ball caster.

(http://www.mcmaster.com/catalog/114/gfx/small/6460kp2s.gif)
Title: Re: autonomous path follower and obstacle avoider
Post by: SmAsH on January 15, 2008, 02:47:23 PM: yea i built the $40 robot and put a ball caster on front works well...
Title: Re: autonomous path follower and obstacle avoider
Post by: tjpark1111 on January 15, 2008, 03:48:01 PM: can i buy HDPE from home depot?
Title: Re: autonomous path follower and obstacle avoider
Post by: cooldog on January 16, 2008, 11:19:13 AM: A CHEAP SOURCE OF HDPE IS IN OLD CUTTING BORDS

sorry about the caps
Title: Re: autonomous path follower and obstacle avoider
Post by: SmAsH on January 16, 2008, 02:51:54 PM: old cutting, do you mean for use in like kitchens? because i have a lot of plastic cutting boards at home...

~smash
Title: Re: autonomous path follower and obstacle avoider
Post by: cooldog on January 16, 2008, 03:16:44 PM: ya :D
Title: Re: autonomous path follower and obstacle avoider
Post by: SmAsH on January 16, 2008, 03:46:56 PM: saweet! ill try and sneek one sometime :D