One of the words quoted by Robert Kennedy is: "Others see the real thing and ask: "Why? "And I dreamed of things that didn't appear, and asked: "Why not? This sentence seems to be particularly applicable to those products related to 3D.
At the University of California, Lutheran University, there is an engineering course designed specifically for first-year freshmen. But this year, the professors of the course found that there were no new students in the registered students, so the professor changed the teaching method accordingly, and added more hands-on projects to the students to choose from. So, there are several students. I created a xylophone that can be played automatically.
The only requirement for the project is to use a xylophone from a toy company, Fisher Price, a Basic Stamp Activity kit (which contains a control panel with programmable motors, servos, lights, etc.), and anything else. Reasonable materials. The grouped Rebecca Drake, Erik Standke and Edom Gelaw quickly realized the potential value of the MakerBot and Dremel 3D printers in the department.
“In order to make our xylophone player different, my team decided to arrange the xylophone keys in an arc and use a mechanism to manipulate a hammer to hit the keys,†says student Rebecca Drake. "As is allowed to unrestricted use of a 3D printer department, so we decided to all parts of the mechanism are accomplished by 3D printing."
All nine parts of this xylophone player are designed in SolidWorks software. The device can be placed on a table, and a circuit board controls the servo that can swing 180 degrees. The upper hammer is also 3D printed, consisting of two parts, one is a hammer handle and the other is a hammer head. In order to make the sound of hitting the keys better, the hammer print is set to be hollow. Beyond that is the most critical part of the entire project: creating the main structure.
“The structure of the fixed xylophone is the most complicated because it is sized to match the movement of the hammer,†says Drake. “A key requires two staples to hold and is kept on a flat surface to ensure accuracy. This part is still very large, so we divided it into two parts and then combined it, which took about 4 hours in total. Print time."
In addition, in order to maintain a fixed distance between the drive structure and the keys, the production team also designed two components that function as spacers. All the 3D printing time of this xylophone player took a total of less than 9 hours.
Finally, the students used the P Basic language to program this simple playing robot and let it play the "World Famous Songs" - "Sparkle and Shining."
“It took about two months for the entire project to complete. Fortunately, in addition to the first attempt to print, the process of our 3D printing parts went smoothly,†she concluded.
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