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The very beginning

Discussion in 'New users start here - FAQ' started by scubanarc, Feb 4, 2014.

  1. scubanarc

    scubanarc New Member

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    Hey guys,

    I'm totally new at this. I want to make a 2DOF joyrider using an arduino. I have not settled on hbridges or motors yet. Something like this is what I have in mind:

    http://www.xsimulator.net/community/threads/joyrider-2-dof-wormgear-dc.4843/

    I'm overwhelmed and don't know where to start. I mean, the very beginning. I've read a ton of posts, looked at lots of info, and I'm still not sure where to start.

    First off... do I purchase joyrider.pdf for $15? Is it relevant to this kind of design?

    Next off... how do I pick my wiper motors? 12v? 24v? Range of motion, torque?

    What POTs can I use? Which is a better pick?

    Is the Sabertooth a good choice over the JRK? I like the JRK's features but I'm questioning the current it can handle.

    So many decisions. What I really want is for someone to help distill it down and say basically "If you want to build a 2DOF joyrider, then do this, it's guaranteed to work".

    Any and all help is appreciated. Sorry if this has been posted literally 1000 times before. You guys must get tired of that :)
  2. Ads Master

    Ads Master

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  3. value1

    value1 Nerd Staff Member Moderator SimAxe Beta Tester SimTools Developer Gold Contributor

    Joined:
    Jan 9, 2011
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    Zug, Switzerland
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    9,236Coins
    Ratings:
    +3,226 / 11 / -1
    My Motion Simulator:
    2DOF, DC motor, JRK, Joyrider
    My joyrider works fine and you can find drawings, motor specs, power supply unit spec, projectors details, etc. in the thread. Modify to your gusto ;)
    There are other similar threads in the DIY section.
    :thumbs
  4. scubanarc

    scubanarc New Member

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    Hey Value, I had looked at yours quite a bit. I've got it bookmarked in fact. Did you ever get those winch motors to quiet down?
  5. bsft

    bsft

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    JRKS will run 14v at 30 amps continuous all day with heatsink on the big chip and fan cooling. In fact we have had our JRKS at spikes of 40 amps, no problem.
  6. fireflyone

    fireflyone firefly's simulatior test build

    Joined:
    Dec 30, 2013
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    uk
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    My Motion Simulator:
    3DOF, DC motor, Arduino, Motion platform, 6DOF
    /* fireflyone changed code to 6 dof 6 servo setup L<Axis1>R<Axis2>F<Axis3>X<Axis4>Y<Axis5>Z<Axis6> enjoy thanks to herctrap and jouiou for thare hard work and supereb coding thankk guys
    * 2DOF Motion Platform with 2 Servos
    * -------------------------------------
    * Thanks to herctrap and his source
    * http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1280139142
    *
    * and also thanks to juiou and his source
    * http://www.x-simulator.de/forum/arduino-and-x-sim-t2773-30.html
    *
    * I just combined their sources.
    *
    */

    #include <Servo.h>

    Servo myservo1;
    Servo myservo2;
    Servo myservo3;
    Servo myservo4;
    Servo myservo5;
    Servo myservo6;
    int Degree;
    int Gforce = 0;
    int Gforce1 = 0;
    int Gforce10 = 0;
    int Gforce100 = 0;
    char kind_of_data;
    void setup() {

    //set servo pins
    myservo1.attach(2);
    myservo2.attach(3);
    myservo3.attach(4); //pwm servo
    myservo1.attach(5); // X
    myservo2.attach(6); // y
    myservo3.attach(7); // Z

    //align servos center postision
    myservo1.write(90); // L
    myservo2.write(90); // R
    myservo3.write(90); // F
    myservo4.write(90); // X
    myservo5.write(90); // Y
    myservo6.write(90); // Z
    //open serial connection
    Serial.begin(115200);
    }
    void loop() {
    // wait for serial input (min 3 bytes in buffer)
    while(Serial.available() > 0) {

    kind_of_data = Serial.read(); //string from USO --> L~a01~ R~a02~ 8bit resolution\decimal output
    if(kind_of_data == 'L') {
    Read_Pos(kind_of_data);
    }
    if(kind_of_data == 'R') {
    Read_Pos(kind_of_data);
    }
    if(kind_of_data == 'F') {
    Read_Pos(kind_of_data);
    }
    if(kind_of_data == 'X') {
    Read_Pos(kind_of_data);
    }
    if(kind_of_data == 'Y') {
    Read_Pos(kind_of_data);
    }
    if(kind_of_data == 'Z') {
    Read_Pos(kind_of_data);
    }
    }
    }
    void Read_Pos(char which_servo){
    delay(2);
    int Gforce100 = Serial.read()- '0';
    delay(2);
    int Gforce10 = Serial.read()- '0';
    delay(2);
    int Gforce1 = Serial.read()- '0';

    //Verifica se e centena dezena ou decimal... =]
    if (Gforce1 < 0) { Gforce = Gforce10 + 10*Gforce100; }
    if (Gforce1 < 0 && Gforce10 < 0) { Gforce = Gforce100; }
    if (Gforce100 < 0) { Gforce = 127; }
    if (Gforce1 >=0 && Gforce10 >= 0 && Gforce100 >= 0) { Gforce = 100 * Gforce100 + 10 * Gforce10 + Gforce1; }
    if (which_servo == 'L') {
    Degree = map(Gforce, 0, 255, 180, 0);
    }
    if (which_servo == 'R') {
    Degree = map(Gforce, 0, 255, 0, 180);
    }
    if (which_servo == 'F') {
    Degree = map(Gforce, 0, 255, 0, 180);
    }
    if (which_servo == 'X') {
    Degree = map(Gforce, 0, 255, 180, 0);
    }
    if (which_servo == 'Y') {
    Degree = map(Gforce, 0, 255, 0, 180);
    }
    if (which_servo == 'Z') {
    Degree = map(Gforce, 0, 255, 0, 180);
    }
    if (which_servo == 'L') {
    myservo1.write(Degree);
    }
    if (which_servo == 'R' ){
    myservo2.write(Degree);
    }
    if (which_servo == 'F' ){
    myservo2.write(Degree);
    }
    if (which_servo == 'X') {
    myservo1.write(Degree);
    }
    if (which_servo == 'Y' ){
    myservo2.write(Degree);
    }
    if (which_servo == 'Z' ){
    myservo2.write(Degree);
    }
    }
  7. eaorobbie

    eaorobbie Well-Known Member Staff Member SimTools Developer Gold Contributor

    Joined:
    May 26, 2009
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    CAD Detailer
    Location:
    Ellenbrook, Western Australia
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    19,889Coins
    Ratings:
    +1,658 / 22 / -2
    My Motion Simulator:
    2DOF, DC motor, JRK, SimforceGT, 6DOF
  8. scubanarc

    scubanarc New Member

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    Are there any good closeup pictures of how to connect wiper motors to a joyrider?
  9. bsft

    bsft

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  10. scubanarc

    scubanarc New Member

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    That's super helpful, thanks.

    Anyone else?