Mechanical Jellyfish with electric Drive
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I have equipped the very popular jellyfish from "jajaum3d" with a small electric motor.
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I used an N20 miniature gear motor as the motor. These motors are available for 3, 6 and 12V for a wide range of speeds. When I first designed the base, I had used the motor
rigidly. The rigid coupling meant that there was noticeable running noise.
That's why I added a TPU motor case to the current design. I now also only run my 6V motor at half the voltage. Since I use USB for the power supply, I connected three universal diodes (4148) in series with the
motor. This means that the voltage on the motor is around 3V with a modest
current consumption of 20 to 30mA. The arrangement now runs very quietly. I think that a 12V motor - operated with 5V - should produce the same result. It should be clear that the nominal speed of the motor is also reduced.
One more quick note on the TPU case. I printed it like this:
2 layers below, 2 layers above, 1 wall, 6% gyroid filling
In case the gears are too narrow or too wide for the shafts, I have included Fusion files. It should also be possible to adjust the X-Y extension slightly with the slicer.
I am only providing the additional files for modification here. Please download all other files
from the creator of the original.
Finally, a big thank you to “jajaum3d” for his incredibly beautiful
project.