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Servomotor got recked? Answered

My servo burnt (only smoke) because i didnt modify it. I forgot to do it and i read the previous lesson too quick. Is there a way to fix it?

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YvesB23 (author)2017-05-03

Whatever can be done, i bet my servo is dead. I really don't understand why we do have to modify the servo motor by removing the microboard. It is not anymore a servo if you do it! You should tell us so to buy a normal motor and not a servo! They are so expensive, 20 euros every one is a lot for me (i'm a student). Thanks for all but i'm sorry, I don't think I'll keep going with your classes.

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BarryD43 (author)YvesB232017-09-14

there are hundreds of much cheaper servos, most start at around $2 AU and go up from there. most of the servos used in small robots are only around 2-5 dollar mark

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PietroN1 (author)YvesB232017-05-03

It is probably dead, because they are AC motors. An option is to buy a DC motor, very cheap and will do the same. This modification just turned the servo into a DC motor.

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LukeB81 (author)PietroN12017-09-02

You can find them by breaking apart any junk printer, too.

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YvesB23 (author)PietroN12017-05-03

I know. But i find this modification useless. Why telling us to buy a servo and modify it when you can directly buy a DC motor?

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randofoBest Answer (author)YvesB232017-05-04

Servos are of a standard size, have standard mounts, have standard torque, and standard voltage requirements. It is also exceptionally easy to attach things to servo motor shafts (with zip ties no less). In addition, it gets people comfortable building with servos for when we move over to Arduino control.

If I tell people to get geared motors, the motors are going to be of all kinds of shapes and sizes, power-ratings, and voltage ratings. Each and every project that everyone makes will have to be modified to accommodate this.

I could link to standardized geared motors and adapters on a site like servo city, but by the time you add up all of the mounting hardware, the cost will be roughly the same. Not to mention, it complicates matters because they cannot be easily attached to things with zip ties.

Anyhow, servos are not AC motors, but DC motors with an H-bridge controller board.

It sounds like you fried the controller. This means you either gave it too much voltage (more than 6V), or you reversed the polarity of your power (albeit, the servo board might protect against this).

Even if you skipped the part about modifying the servo, and followed my directions, this shouldn't have happened. The servo wouldn't have moved, but it also wouldn't have caught on fire. It makes me wonder what your wiring setup looks like.

Nevertheless, you should be able to still remove the servo board and power the motor inside of the servo directly (with 6V or less), and it should still work. You unlikely destroyed the motor.

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YvesB23 (author)randofo2017-05-04

Thanks for your prompt answer. Hugs from Spain

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YvesB23 (author)randofo2017-05-04

It harms my sweet heart to remove microchips from servos and then throw them away

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YvesB23 (author)randofo2017-05-04

My wiring was very simple. When connecting it, the servo didn't move. It just made a little sound like "tic". I reversed the polarity and some smoke went out. I know servo are standard, but DC motors too and not too hard to fix them to the chasis with another piece that could be bought on makeblock. The other problem I thought about servos is you loose the warranty of the servo while opening it and modyfing it (logically). And that can be risky

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PietroN1 (author)2017-05-04

Correction: My bad, I was wrong, servos are not AC. And he is right, it is a pain to make mounts for geared motors!. And you don't need to throw away the microchips, just resolder it after using it in this project.

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