Let's Make Robots!

wheels

Hello guys, Lots of little projects left on my to-do list. Finally got the bi-ped to walk ( Still wobbly ). Need to complete MBB to follow lines (and solve mazes). … Read more
High speed omni directional robot ideal for soccer bots
Using a
Now with video, Scamper appears to be a little wobbly at slow speeds but that is because at only 6%, the motors are constantly stalling and restarting. Once the … Read more

Unlimited power! But how to put it to good use? (motor torque)

Well not exactly unlimited power, but a lot of power! My wifes lower back is worn out so she can't walk long distances and because not everything is reachable by car we have a foldable disability scooter to overcome that problem. Unfortunately the batteries needed replacement, quite expensive.

The good news is that I now have the old two 12v traction batteries. One can only hold about 60% of it's charge, not of much use. The other is 90%, definitely good enough to use and since the battery is about two times as small as a regular car battery it's perfect for a robot!

Knocks Objects Around the House
Using a
Hello All,   The world is full of obstacles, and Fightron 1.0 here, is ready to knock out some, in his own robotic journey.   After recently building an obstacle … Read more

Researching three-wheeled off-road robots, asking for info.

Hello everyone,

I've been thinking about building a large off-road robot for a while. I want to make it a fast three wheeler that uses two bicycle tires in the front (bmx size) and a smaller child's bike wheel on a caster in the rear. All of the wheels are going to be independently suspended, with leading arm suspensions in the front and a trailing arm in the back. One design goal is to make it faster than a person can run (roughly 10-15 mph).

Dolly Wheel Idler Plates

It is now easier  to build your own custom dolly. Simply use our new Dolly Wheel Idler Plates to assemble a low friction system designed to work with 1” OD to 2” OD tubing (and any OD in between). We highly recommend using standard PVC pipe that can easily be purchased at your local hardware store. http://www.servocity.com/html/dolly_wheel_idler_plates_a__58.html

Hello LMRians, This is a PID implemented line follower using an Arduino ATmega168 clone, Pololu QTR-8RC sensor array, a Pololu TB6612FNG Motor Driver, and super … Read more

Sumo Robot Tires Suggestion

Hello LMRians,

So i am building this sumo robot for a 3-kg cateogry competition. High traction wheels are defnitely what i am thinking. Currently, i'm having a look at these three: 

1) http://www.robotshop.com/productinfo.aspx?pc=RB-Lyn-210&lang=en-US

2) http://www.robotshop.com/productinfo.aspx?pc=RB-Lyn-14&lang=en-US

Segway Wheels

Hello everyone, 
I'm posting here today because I am currently in the middle of a segway project, and am looking for advice or ideas for one or two of its components.

Need sugestions on tires for my robot

Hey everyone, I am building a sumo bot and I want to make the wheels myself out of wood, now, as some of you may allready know, a sumo bot requires good traction and that is something that wooden wheels bring to the table, so here is my question, what are some good things to put on wheels that are like tires.

 

P.S I have allready thought about using rubber wristbands but as the dimensions of the wheel are 4cm diameter and 1 cm wide, this is not a possibility. 

Testing the wheeled version

As announced in our previous post, we are working on wheeled version of our robot. Tires and shaft adapters are arrived today and we mount them to conduct first test drive. Here are some photos:

QUESTION - Grid tracking robot

Hello,

I am completely new to robot building and, in turn, new to this forum. I am currently studying Computer Science so I may be able to use some of what I know already to help.

 

Anyway, I have a basic idea in my head but I am asking for a little help on, how you think, it could work. It seems relatively easy in my head - for those that are used to robot building;

 

Re-inventing the robot wheel

Anyone wanting to play with articulated robotic systems like arms, legs, pan tilt cameras etc will invariably end up using the ubiquitous hobby servo, a handy little gear motor that comes with its own angle sensor and closed loop position control. You just plug them in, send a position pulse and away you go. You can even hack them to produce continuous rotation for wheeled platforms, albeit without any closed loop control.

Wheel specialist

Hi, does anyone know of an online store specialising in wheels?

I mean really specialising in wheels?

I'm getting picky: I've been planning my robot for several months, and have calculated my exact requirements and I know exactly what I want - a wheel with tire, 80mm in diameter, must support approx 7.5kg in weight (so need to be quite wide) and I want gnarly/chunky off-road tyres, though my robot will be indoor-based, they must fit a 6mm motor shaft.

Trundles around attempting to avoid obstacles (and sunlight).
Using a
This is the basic Start Here! robot, whose job is to move forward until it detects an obstacle and then stop and decide which direction it should turn.  So far I … Read more
Drawing on the popularity of the Tiny Tank, I decided that some folks might want wheels instead. I give you, Little Wheels. The Little Wheels Robot is a great … Read more
RC lawnmower for cut the grass from my android phone !
Using a
Hi everybody, First i present myself, so i am a 19 years old boy from france, i am actually studing at the university in tours ! I like technologics hackings and i … Read more

My wheels do not move.

I'm trying to make http://letsmakerobots.com/start

My wheels do not move when I program it. This is the code I use: http://pastebin.com/eZCYiBuv

I'm pretty sure that the pins are soldered correctly to the board. I already re-soldered them 3 times and they look just like they do in the pictures that are in the instructions.

Question for Rover 5 users about alternate wheel options.

SO, having completed my holiday obligations, it's time for a little present from me TO me.  I've been collecting assorted parts, and experimenting with Arduino code and have decided that pretty much everything I want to do with a robot base can be most efficiently, cost-effectively accomplished with a Rover 5, and it's at the top of my "Been a good boy" list.

The only thing I don't like about it is those rubber treads that seem to keep falling off.  And since it's my intention to get the Rover 5 with 4 motors and encoders, I've decided to go with independent wheels.

Navigates around via ultrasound
Using a
This is a very simple robot which only has two wheels made of old CDs. Its brain is a motoruino and uses a sonar to detect and avoid the obstacles. On the video … Read more

tank treads and wheels

hay guys i was just wondering about the advantages of using tank treads and /or wheels....or any other types. efficiency? stability? does it have a large affect ?

thanx for your help

Jordan

Best robot chassis

Was wondering what you guys thought the best "chassis" for robot development was.  Not looking for electronics or a "kit" but just a platform with wheels (or legs or whatever).  I like the idea of doing my own electronics (processors, sensors, power systems, etc.) and could/would eventually build my own from component parts, but I like the speed of starting with known motor/wheels/platform that are well matched and robust.  I have already fried a servo trying to start with that.  I also figure that by the time I bought motors, plexiglass, wheels, etc.

uses wheels made from plastic bottles
Using a
BOTtle is a robot like many others but with a particularity, the wheels are made of plastic bottles as you can see in this video … Read more