Today we built a motor in class with a partner. I was partnered up with Jessica and we had a lot of fun together.
Our mission is to build a motor that could rotate at least three rounds. We brought our own materials to class, such as woods, corks, nails and pop cans. Our wood is not wide enough, so we nailed two pieces of narrow wood sticks together to form a wide one. We had 30 minutes to finish all the nailing work because it was very noisy and we were interrupting other classes. I thought Mr. Chung gave us too much time on this, but I was wrong. When he said that time is up and we have to return the hammers our group far from finish, so we actually kept a hammer secretly in order to finish the work. And the reason why we are running out of time is because we had to do many measurements and fittings. However, I and Jessica had a great team work though, when I was doing the nail work, she was sanding the pop can and the stripes of the wire at the same time. Therefore after the nailing part, everything went so quick and smooth. We soon combined all the parts together and tested our motor. Yeah! We passed the first time! I was amazed by our success and by seeing a real motor spinning so fast. So I guess our biggest obstacle will be the nailing part. It really took us almost the whole period.
Then Mr. Chung said that we need to blog about our motor today. So I take out my cell phone and ask Mr. Chung to retest for us so that I can record it and upload it to my blog. But the thing is, our motor is not working anymore! Mr. Chung said: “thank god you’ve passed. Go back and fix it.” So I tried to fix it but I only made it worse. The second time I tried to test it, there was only sparks between the brush and the commutator. Finally Mr. Chung found the problem and fixed it. It was because we used a really bad commutator .
Sorry that I don’t have any picture or video of our motor. I couldn’t find my usb cable for my cell phone, but I will try to upload some pictures tomorrow.
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