March 2014 archive

Progress Report #2

Download – Progress Report #2

Strength Test (3 Trials) with Updated Exoskeleton Design

The three strength test trials are shown below. Trial #1 Trial #2 Trial #3 This test was done using the 320Kg*cm servo motor. A variety of weights up to 8 pounds were used, where the outcome of the experiment was determined through the angle shown on the brace for each weight. Results Trial #1: 70 …

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PCB Design

The PCB design was done through KiCAD, with the 3D simulated image shown below. The actual PCB that came from PCB milling machine (front and back images) are shown below. After the PCB came out, rubbing alcohol was used to remove any excess residue. We have already begun to solder the components onto the board …

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Adjustable Arm Brace, Force Sensing Resistor (100 pounds)

Through an auction on ebay, we placed a bid and won an adjustable metal arm brace that is used for rehabilitation purposes. To improve on our design, which was previously plastic, we have decided to use this arm brace to support the arm with the large amount of torque provided by the servo motor. The …

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Strength Test, New Servo, Power Consumption

We performed a strength test with the 40Kg*cm servo with 55rpm shown below. After performing the strength test, the maximum amount of weight that the servo could handle at 26cm was 2 pounds. We realized that this servo was incapable of carrying an arm, therefore we decided to upgrade our servo motor. This was a …

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