Leo12
Eurobricks Vassals-
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About Leo12
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LEGO Technic.
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Which LEGO set did you recently purchase or build?
Bucket wheel excavator.
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Gender
Male
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LEGO Technic.
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United States
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[MOC] 90 degree stepper for servo motor
Leo12 replied to Leo12's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
That’s pretty much exactly how it works. If you do end up building it let me know what you think. -
[MOC] 90 degree stepper for servo motor
Leo12 replied to Leo12's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Sure. https://streamable.com/eeg14z -
[MOC] 90 degree stepper for servo motor
Leo12 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
This is a new stepper designed for use with the power functions servo motor. The output will spin 90 degrees every time the servo fully turns to the right or left and returns to center. The basic concept is that when the servo leaves it’s center position one of the ratchets on the differential housing disengages. As it continues to rotate the other ratchet stops the housing from moving, rotating the output. When it returns to center the engaged ratchet allows the housing to slip, so the output remains stationary. If you plan on building this yourself and it is not turning reliably check that the ratchets can rotate easily and the rubber band has enough tension. -
[HELP] Generic Building Help Topic
Leo12 replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I like this solution. Thanks for the help! -
[HELP] Generic Building Help Topic
Leo12 replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Yes, that’s what I’m looking for. Ideally it would have very little change in gear ratio, but definitely not too much gearing down(unlike a worm gear). Both sides should be able to rotate in both directions, and it needs to be fairly torque resistant. If it helps, I’m using it for a three speed differential gearbox. I need to make sure the axle from the differential can’t back drive when the driving ring is disengaged. -
[HELP] Generic Building Help Topic
Leo12 replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
It’s not that I want it to rotate in one direction, I just want to make sure that the output can’t drive the input. -
[HELP] Generic Building Help Topic
Leo12 replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi everyone, I’m wondering if there are any alternatives to worm gears. I need something that can only be driven one way, but I don’t want the extreme reduction provided by the worm gear. Do you have any ideas? -
[HELP] Generic Building Help Topic
Leo12 replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Yes, it must because it’s a three speed. I even made a similar one and it worked. The description mentions something about applying an radial force to the axle to stop it from rotating when torque is applied to the output , but I don’t know how that is achieved. -
[HELP] Generic Building Help Topic
Leo12 replied to Jim's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Can anyone explain how this gearbox works to me? I understand what happens when the driving ring is engaged, but I don’t get why the differentials output doesn’t spin freely when the driving ring is disengaged. Gearbox Video -
Live axle articulation.
Leo12 replied to Leo12's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Ok, thanks for the help. -
Live axle articulation.
Leo12 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I am working on a trophy truck. I am having problems with the rear live-axles articulation. It only turns about 20 degrees. Is this because the links are located far away from the ball joint or is it something else?