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11th February – Lift Up the Ball & Recycle

For this week, we have been assign two tasks which is to create a robot that can lift a ball and use the robot as a recycle robot. It is up to each group’s creativity on how to make it work. After having some discussion, we have decided to make the robot grasp the ball due to several reasons. First, we want to make sure the ball did not fall after being lift and second, we want to make sure even if there is wind or other distraction the ball will stay in the arm of robot. We also decided to use 3 motors instead of 2 for the robot’s arm.

For the robot construction, we find it was not really easy since this time we have to use 3 motors and make sure the design did not distract the movement of robot’s arm. After several modification, we finally have come out with final design. Even though it was not really pretty, but it function well and really effective.

After the first task finished, we change the programming of the robot for the second task. This time, the robot must grasp things, bring it to the particular place and put it in the designated box. Even though we met some difficulties, we still managed to finish the task. For the report, you can view it below:

__________________________________________________

DATE: 11th February 2009

TIME: 0800 – 1330

TOPIC: Lift Up the Ball & Recycle

AIM:

The aim of this project is to lift up the ball. After that, the robot will be use as a recycle robot which can lift up and put the things in a particular box.

OBJECTIVES:

By the end of the lesson, students should be able to:

1.  Demonstrate a robot which can lift up the ball.

2.  Demonstrate a robot which can lift up things.

3.  Demonstrate a robot which can put the things in a particular box.

4.  Programming the robot using LEGO MINDSTORMS NXT Software.

MATERIALS AND EQUIPMENTS REQUIRED:

1.  (9797) LEGO MINDSTORMS Education Base Set

2.  (2000080) LEGO MINDSTORMS Education NXT Software v2.0

3.  Light sensor

4.  Ball

5.  Box

PROCEDURES:

1.  Design a robot using your own group creativity.

2.  Fix the components according to the design which had been thinking.

3.  Use the light sensor and put it at the suitable places at the robot.

4.  Setup the programming using MINDSTORMS Software.

5.  Download the program to the Intelligent NXT Brick.

6.  Test the robot to see whether it can function well or not.

7.  If it does not function well, modify the program again until it meets to the objectives given by the lecturer.

8.  Present the robot to the lecturer and other classmates.

RESULTS:

The robot manages to lift up the ball. When it comes to the recycle session, the robot manages to lift up the things and put it in the particular box. The light sensor is use to detect the right box according to the things that the robot hold.

PROBLEM ENCOUNTERED:

at the beginning, our robot cannot manage to lift up things because the hands of the robot not strong enough to hold or grab it for long time. The robot hands should be able to hold the things for long time and make sure the things not fall down. After a few trial of designing the hands, at last our robot manage to hold the things for long time and the things not fall down until the robot meet the particular box.

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