Measured+Turns+Notes

Link to video instructions: http://www.education.rec.ri.cmu.edu/previews/nxt_products/robotics_eng_vol_1/preview/content/projects/hallbot/turn/measureturn/index.htm

Outline of what needs to be done to program a swing turn.

1. Calculate the circumference of the wheel for later use. 2.Calculate the circumference of the T-Circle.

Step 1: Use this equation to find the distance the wheel has to travel to make a turn of a specific number of degrees. What distance must the wheel roll to make a turn of a specific number of degrees. In the above equation you are solving for distance.
 * __Angle Turned__ ||  || = ||   || __Distance Traveled by wheel__ ||   ||   ||   ||   ||   ||   ||   ||
 * Full Circle ||  ||   ||   || Circumference of traced circle ||   ||   ||   ||   ||   ||   ||   ||

Step 2: Use this equation to determine the number of rotations the wheel has to spin. How many rotations will make the wheel roll the distance calculated above. Distance = (Wheel Circumference)(Rotations) In the above equation you are solving for rotations. Distance is the answer from step 1.

Step 3: Convert rotations to program degrees by using a conversion factor. How many program degrees will turn the motor to spin the amount of rotation calculated above. Above is the conversion factor. Below is how to use it to convert rotations to program degrees.
 * __360 degrees__ ||
 * 1 Rotation ||
 * Rotations ||  || x ||   || 360 degrees || = Program Degrees ||
 * ||  ||   ||   || 1 Rotation ||   ||

Measured Turns Practice Self-Check

Practice problems b

More practice

Examples: Worksheet you did with the video: http://robotstpjhs.wikispaces.com/Measured+Turns http://robotstpjhs.wikispaces.com/Feb+26 http://robotstpjhs.wikispaces.com/Two+Turns http://robotstpjhs.wikispaces.com/Turns+3+%26+4 http://robotstpjhs.wikispaces.com/Turn+5