Tutorials

Test Rig

Our test rig is built on the principals of a pendulum. The independent variable is location at which the ball hits the bat. The variable is changed by moving the fixed point of the pendulum vertically. We change this rather than the length of the string because the force that the ball hits the bat with is directly proportional to the length of the pendulum string, and we need the force to be constant. 

CREO Parametric Files 

Full Assembly

Back Panel

Ball

Bat

Pendulum Holder

Stand

Pendulum



Arduino Uno Code

// This code is in the public domain.

// these constants describe the pins. They won't change:

const int groundpin = 4; // analog input pin 4 -- ground

const int powerpin = 5; // analog input pin 5 -- voltage

const int xpin = A0; // x-axis of the accelerometer

const int ypin = A1; // y-axis

const int zpin = A2; // z-axis (only on 3-axis models)

int var = 0; // initialize the counter to zero

void setup()

{

Serial.begin(9600); // initialize the serial communications

// Provide ground and power by using the analog inputs as normal

// digital pins. This makes it possible to directly connect the

// breakout board to the Arduino. If you use the normal 5V and

// GND pins on the Arduino, you can remove these lines.

}

void loop()

{

     while(var < 300)
     {
           Serial.print(analogRead(xpin)); // print the sensor values
           Serial.print("\t"); // print a tab between values
           Serial.print(analogRead(ypin));
           Serial.print("\t");
           Serial.print(analogRead(zpin));
           Serial.println(); delay(1); // delay 1 millisecond (.001 seconds) before next reading
           var++; //increase the counter by 1
      }
}

How to 3D Print Anything