DX » Community » Reviews » SG90 Mini Servo with Gears and Parts (2Kg Torque)
5.0
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  • Very good for the price

    posted by BikerRay on 09/12/2011
    1

    Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week

    Pros:

    Very small, quite powerful. No noticeable gear backlash. Quite fast. Small amount of overshoot, if any. Very good value for the price!

    Cons:

    Like others said, the arms are a bit hard to get on, and the knurling (to stop them slipping on the shaft) means you can only set them to about 10 degrees. Not a big deal, but you have to be a bit careful installing the arms so you don't damage the servo.

    OtherThoughts:

    The standard pulse width of from 1000 to 2000 usec gives a rotation of a bit under 90 degrees. If you are doing your own programming (say, with an Arduino) you can get the rotation to almost 180 degrees with a pulse width of approximately 500 to 2500 usec. Caution - extending the pulse width could damage the motor if it hits an end stop.
    Note color code of wires: Brown is ground; Orange is +5v; Yellow is signal.

    Bottomline:

    Nice unit. I'm using a pair to control a web camera, and they seem to work fine. Will see how good they work outside in the winter! I may buy some more just to play with.

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