Week 12: Design
NOV 14th - Small Scale Bogie Improvements Team
Continuing from last weeks flanged wheel design, after increasing the angle to 25 degrees I was able to achieve passive turning. However, the dramatic increase of angle lead to excessive rocking back and fourth of the wheels. While not perfect the concept is proving feasible with more angles to be tested. Some concerns is that inconsistencies in the track may cause results to vary in some areas but with the small scale track team's efforts in improving the bending process the function of the wheels will most likely succeed. A comparison of pros and cons of using the wheels and differential is required for further development towards a final design.
I received information from professor Furman and his guest that bricklink.com has a wide selection of Lego parts that will aid in gear selection to ensure functional gear trains for using bevel gears with the differential. Additionally, the small scale track team and I visited Daniel Bolin from Bojo tools and discussed manufacturing of bogies using injection molding. For the bogie it was suggested that injection molding isn't the best process for making bogies but rather looking at machining them should be looked into. It was also discussed that the possibility of using delrin as the material of choice do to its self lubricating properties that will aid in reducing friction from the axle to the body.
Continuing from last weeks flanged wheel design, after increasing the angle to 25 degrees I was able to achieve passive turning. However, the dramatic increase of angle lead to excessive rocking back and fourth of the wheels. While not perfect the concept is proving feasible with more angles to be tested. Some concerns is that inconsistencies in the track may cause results to vary in some areas but with the small scale track team's efforts in improving the bending process the function of the wheels will most likely succeed. A comparison of pros and cons of using the wheels and differential is required for further development towards a final design.
I received information from professor Furman and his guest that bricklink.com has a wide selection of Lego parts that will aid in gear selection to ensure functional gear trains for using bevel gears with the differential. Additionally, the small scale track team and I visited Daniel Bolin from Bojo tools and discussed manufacturing of bogies using injection molding. For the bogie it was suggested that injection molding isn't the best process for making bogies but rather looking at machining them should be looked into. It was also discussed that the possibility of using delrin as the material of choice do to its self lubricating properties that will aid in reducing friction from the axle to the body.
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