First Robotics Lab

Sustainability energy technology

Josh Dion

We covered lot of basic things in the first robot lab.  The first thing I did was measure that diameter of the wheel to find the circumference.  The diameter was 5.5cm and to find the circumference in meters I multiplied but 3.14(pi) and divided by 1/100cm to get 0.1727m.

The table below shoes the data I got.

1. The rotation of the wheel compared to how many turns is accurate.  As you can see in the second run at power 50 the wheel rotated once (.98 of a turn) and almost exactly 360 degrees which is one full circle.
2. 1 second= 1000 milliseconds I made the program run for 1 second each trial.
3. I found that 1 turn is around .18m or 18cm which is around 360 degrees each full turn should move the car around .18m

Percent Difference table

To find the percent error I used this equation

(Distance of robot – distance measured/ average of both) x 100= percent error

To find average I used (Drobot+Dmeasured/2)

Table

What I learned

From this lab I learned that the robot does not have the most exact measurements.  According to this program 360 degrees is not exactly one turn.  The percent error is fairly low for this but must be taken notice. I also found that each motor is not the same.  I read that the rotation of each wheel is a little different meaning the robot may not move in strait line.  Last year I used nxt robot software at my high school so this is not very new to me. Overall, this was a fun lab to get to know the program a little and how these robots measure.