It’s much better to put an axle on it and wrap a cord around it to make a winch for endurance testing. And a lever hitting a load cell is not a good way of testing this. Gear boxes like these really need several hundred hours of testing under load before any useful conclusion about their usefulness can be made. Posted in Tech Hacks Tagged 3D printed gears, gearbox, planetary gears Post navigation We’ve featured a number of ’s projects before, including a bag tracking corn hole board, and a 3D printed linear actuator. Check it out in the video after the break. As suggests, adding a sensor and encoder would allow for better testing and low speed applications. This number might not be accurate, since sensorless motors like this one can not provide a smooth output force at low speeds. The motor was able to exert approximately 9.5 Nm through the gearbox. The first test actually broke the moment arm, so a reinforced version was designed and printed. To measure torque, mounted the motor-gearbox combo to a piece of aluminum extrusion, and added a 100 mm moment arm to apply force to a load cell. Thanks to the high-pressure angle, straight-cut teeth, and fairly loose clearances, the gearbox is quite noisy. This means the output speed reduces by a factor of four for each added stage. Each stage consists of a 1:4 planetary gear set that can be connected to another stage, or to an output hub. The gearbox is designed around a cheap, 5010 size, 360 KV, sensorless motor from Amazon. decided to try his hand at designing a stackable planetary gearbox for a brushless motor that allows him to add or remove stages to change the gear ratio.
Affordable brushless motors are great for a variety of motion applications, but often require a gearbox to tame their speed.
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