(Sin alpha)^2 + (Cos alpha)^2 = 1

Let's Make Robots Robots
1

Hi guys!
I present you my sixth robot. It`s from plywood and it´s very light robot.

It can be moved in the middle.

He receives four strong (12kg/cm) servos modiefied for continuos rotation and four servos for control.

It can dance "sine or cosine" and it can overcome various obstacles

I wanted to actually write chalk "I Like LMR", but i need more time for programming.

Here some pictures:

 

Sine dance

  • Actuators / output devices: 8 x servos
  • CPU: Picaxe 28x1
  • Power source: 6V 2200Ah (5xAA)
  • Programming language: Picaxe basic
  • Sensors / input devices: Without sensors
  • Target environment: outdoor
This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/sin-alpha-2-cos-alpha-2-1
2

Great design
That is such an awesome design. I’d love to see it being used to write things on the pavement with chalk! The wheels must be very grippy not slip down that slide.

3

Interesting design

so you used 8 servos?

 

4

Very impressive! I love how
Very impressive! I love how it handles. Any plans for adding sensors or do you consider it "done"?

5

5 ***** for the concept and

5 ***** for the concept and for the design :wink:

I wonder what you gonna do next :smiley:

6

I will try it.
I will try it.

7

Yes!

Yes,

Ii used 8 servos. four servo move the wheels and four control the direction.

8

No sensors!
Unfortunately, I have no plans for sensors. I hope that I still try the writing "I LOVE LMR".

9

Thank you for your praise

Thank you for your praise.

Perhaps I’ll write things on the pavement with chalk. I do not know, becouse I have a new idea - with “remote control”.

10

very cool!how did you make

very cool!

how did you make the turning serrvos move so smooth?

11

It was very easy!

Look:

init:
b1 = 100
b0 = 225
b9 = 3
b10 = 3
b11 = 3
b12 = 3

servo 0,150 ‘ initialise servo
servo 1,150 ‘ initialise servo
servo 2,150 ‘ initialise servo
servo 3,150 ‘ initialise servo
servo 4,150 ‘ initialise servo
servo 5,150 ‘ initialise servo
servo 6,75 ‘ initialise servo
servo 7,75 ‘ initialise servo

servopos 4,150
servopos 5,150
servopos 6,75
servopos 7,75

main:
let b0 = b0 - b9
servopos 0,b0
servopos 1,b0
servopos 2,b0
servopos 3,b0
pause 50
if b0 < 75 then goto main1
goto main


main1:
let b0 = b0 + b9
servopos 0,b0
servopos 1,b0
servopos 2,b0
servopos 3,b0
pause 50
if b0 > 225 then goto main
goto main1

12

Cool :smiley:
Cool :smiley:

13

This robot is so cool! I
This robot is so cool! I have decided to build a slightly larger version out of Servo Erector Set brackets, plus some custom SES brackets I am designing for the rocker arms. How are you doing the rocker effect without having the controller and everything tip upside down? This is the part I have not figured out yet but am working on. I already have my rocker arm brackets mostly designed and assembled in 3D CAD, but need to figure out the pivot system.