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Alonso Martinez
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The Making of Gertie - Part 3: Engineering the Jump
The next challenge was to create the right springs for Gertie's hopping mechanism. They would fit in between the leg and the servo. The springs would compress as Gertie landed from his first jump, storing some of the energy as potential energy, that could b...

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Making of Gertie - Part 2: Early Designs and 3D printing
For some background on Gertie, check out  Part 1: Starting Out ! After figuring out what I wanted in the robot's design and function, I decided to start with my first 3D printing experiment. Using Maya, a 3D graphics program, I created a digital mockup of G...

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The Making of Gertie - Part 1: Starting Out
In existing toys, there were a couple of examples I looked at. One was the flipping dog, which uses a rack and pinion to propel the toy forward: in the diagram below, the pinion (cog wheel on the left) turns counter-clockwise. As it turns, it compresses the...
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