Week 4 progress
- 2f44
- Feb 28, 2020
- 1 min read
Updated: Mar 5, 2020
The main job of this week is manufacturing the robot hand with the basement.
A cookie box is used to be the basement. There are two advantages, the first is the material is cheap and reusable. And the second one is the structure can be designed to make sure it can be opened easily to adjust devices after manufacturing.
A saw was used to cut the box lid. To ensure the fish line get through the lid, a hole was opened on it and covered with tape on its sharp edge to guarantee the fish line can be pulled smoothly. One edge of the lid was moved off to transform the lid to a slide lid, which makes the adjust for the devices in the box easily.
The robot hand was fixed on the lid by hot melt adhesive. The bottom of the box was used as the substrate of the motors, they are fixed on it with hot melt adhesive as well.
The circuits of both the glove and the hand were completed. The resistance of these sensor depends on the magnetic flux flow through it. As measuring, without any force applied on it, the resistance is accurately 33kohm. After bended to 90 degree, it changes to 10kohm accurately. In this process, the changing diagram is nearly analyse linear.
A 4.7kohm resistor is connected with the flux sensor in series. This resistor has two functions. First, protecting the circuit. Second, the voltage across the resistor changes between 0.623volt and 1.598volt theoretically, which is more suitable for monitoring.
author-Gong
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