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Thread: INTRODUCING: the "Roto Damper"

  1. #731
    TVWBB Diamond Member
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    Apr 2013
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    Since the screw rotates with the servo horn (and gear beneath) the screw will not work loose no matter how lightly you tighten it, no need for loctite. If you are concerned that it is too tight test the motion without the screw installed and see if it still sticks?
    Over the past number of years I have never had someone report a friction issue that required lubricant. Perhaps you should wash both disc's that make up the damper to be sure there is nothing sticky on there? Perhaps things tighten up after exposed to such heat? Though I have sent dampers to Arizona, Texas etc and never had anyone report an issue with the heat...
    Post a picture of the damper with the damper disc removed, I am interested in how the servo shoulder is sitting in there...
    Last edited by RalphTrimble; 07-02-2019 at 11:41 AM.
    I created the Roto Damper, RD3, HMv4.2 sliding back case, "air-burner" and the "ping-pong" valve in my quest for delicious "set and forget" BBQ.

  2. #732
    New Member
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    Apr 2019
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    Phoenix, AZ
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    Well the issue was not the damper plate or how tight the screw was. When I took the servo out of the case it still would stick every other time at about 25 - 30 percent.

    I replaced it with a different brand of servo that seems much, much smoother and also has not stuck once so far. Been outside in the heat all morning.

    So either the batch of two "TowerPro" brand MG90S servos were bad or that model is bad. Anyway, for me they are black-listed and the TIANKONGRC brand are on the white list.

    Thanks again and hope this helps someone.

    Thanks - Richard

  3. #733
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    IIRC, there's a post around here someplace about counterfeit TowerPro MG90S and their differences. Wonder if you got one of the problem children?

    Here we go: https://tvwbb.com/showthread.php?767...ht=counterfeit

  4. #734
    New Member
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    Apr 2019
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    Phoenix, AZ
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    Exactly! Yes, the two on the left are the ones that went bad. The one on the right, labelled "TIANKONGRC", seems to be much better.

    [IMG][/IMG]

    It would not fit the keyhole slot, so I had to use a small rat tail file and relieve it a bit.

    But works fine. I'll be sure and post some negative feedback to the seller on Amazon for the first two - though since I've cut then leads I probably can't return them.

    Thank you again - Richard

  5. #735
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    Apr 2014
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    Montana, USA
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    The two on the left are NOT towerpro servos. They are most definitely counterfeit.

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