The Minebot project for the most part, is running smoothly. Testing procedures for the robot were carefully selected to ensure it can navigate as much as the rough and varied terrain found in Cambodia. The procedures specified target metrics for clearance, forward and turning speeds, and time required to complete a test.
Earlier in the week, the robot’s electrical system was checked and then it was switched on. The Minebot could successfully roll around the design lab’s tiled floor with some sliding, a promising start. Two days later, it was brought outside to begin the procedures. To say the least, the tests were not successful. However, valuable information about what needed to be changed was obtained.
To start, the previous problem of debris getting caught between the tread and its rollers still needs to be addressed. An easy fix was formulated involving household brushes. Another issue is that the side panels the tread rollers are mounted on are rather flexible. They bend outward when the Minebot tries to mount an obstacle, so not only does the tread have less effective area, it also prevents the robot from driving straight. A similar problem affects the top cover on the rear segment. Instead of lifting the front segment up, the actuator (shown below) lifts the rear segment up because it’s lighter and bends the rear cover so the energy is not transferred as efficiently. Lastly, the tread does not have enough friction for good control. This could be easily fixed in the United States with a kit, but the high cost and time cost of shipping requires a much more creative solution.
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