Twisted line following

Twisted, a line-following robot by Steve Hassenplug, running a basic course at BrickFest 2006 at more than 1 meter/sec. It uses two independantly driven rear wheels and a steered front wheel assembly with three tightly clustered light sensors. All LEGO

Category:

Howto & Style

Tags:

• linefollowing
• lego
• brickfest
• 2006
• robot
• twisted

[karandex]

please sir can u teach me the program or algorithm

[brdavis5]

Well, 1st, it's not my robot. 2nd, the control program will depend on how you build the robot (Twisted uses three motors, one for steering and a left and right drive motor, and actively controls power to all of them). 3rd, it's a little difficult to just "teach" you... how much line following have you done? What techniques have worked for you in the past, and why?

[karandex]

i have done basic 5 sensor and 3 sensor line following for right angles no PID

[brdavis5]

What type of robot? Steering? Tricycle drive? Skid-steer? How far out in front are the sensors? Are they in a line, or a V? Etc.

The robot you see actually has no PID, and only uses three sensors. Based on the returns from those three sensors, it selects how "hard" to turn, which required a lot of careful thinking on Steve Hassenplug's part, and a whole lot of testing. It also won't work on right angles or sharper corners... so what technique you use also depends on the track you try to follow.

[fopple13]

wow! that is the fastest line follower ive ever seen! great job!

[brdavis5]

Thank you - although it's not actually my robot, I'll take credit for the video of it :)

[raz0rrishi]

hello sir,

i m Rushikesh from india, i have great interest in robotics. i have made a line followr using 2 ir sensors. now after seeing your video of steves twisted bot (pardon if the name is wrong) . i have decided to make a bot like the one in the video. i have: 2 150 rpm dc, 1 servo motor, atmega8, l293d motr drivr, 5 IR board( in one line ) please help me with this . also the thing is that i have promised my teacher to make it before new year :-) so you can understand .

Thankyou

[DrModd]

The turns are so smooth at tha speed, very nice indeed:)

[brdavis5]

Thanks. It's actually Steve Hassenplug's robot, and can break the 1 m/s benchmark... but yes, I think i took a very nice video of it ;-).

[you2486]

This is jus unbelievable........very nice.