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resistor for sabertooth 2x32 - psu 24v 1000w - motor 24v 350W

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by gigi, Mar 28, 2019.

  1. gigi

    gigi Active Member

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    Hallo,
    I have this configuration
    sabertooth 2x32 for n.2 motors 24v 350w 20,5Ah each . the PSU is 24v 1000W like meanwell.
    Can you please suggest a correct resistor to avoid that regenerative current bourn my psu?
    I asked to dimension enginering and they suggest at least resistor 200w 3 ohm
    In the sabertooth box ther are only 2 small resistor 10W and a resistor 200w 3 ohm is very expensive.
    Any suggestion?
    thanks for support
  2. Milani Fabio

    Milani Fabio Member

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    Hi Gigi, this is the link of the same subject discussion.
    https://www.xsimulator.net/community/threads/sabertooth-2x32-uno-rev3.12391/
    Same your problem, n. 3 engines and n. 2 power supplies with the same features for DOF 3.
    I purchased n. 6 metytere resistors in pairs in parallel of 6.8 ohms 100w.
    https://www.cariatielettronica.eu/1...100-watt-corpo-in-alluminio-100w-100watt.html
    Hello
    Fabio
  3. gigi

    gigi Active Member

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  4. Milani Fabio

    Milani Fabio Member

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    The 6 ohm resistense are hard to find, I don't know why.
    I'm not an electronics expert.
    The value that is closest is 6.8 ohms, I asked a store in my city and he told me that it's fine.
    Hello
  5. bixler13

    bixler13 Member

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    Check car turn signal resistors as well. Here you can get a 2 pack of 50W 6 ohm resistors for $5 USD. Use standard series and parallel connections as required to get the correct resistance and power requirements.
  6. gigi

    gigi Active Member

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    Hi bixler13, thanks for your post.
    I bought these:
    https://www.cariatielettronica.eu/1...100-watt-corpo-in-alluminio-100w-100watt.html.
    N°2 resistor 100w 6,8ohm each in parallel for each motor mean that total resistence is 200w 3,4 ohm. I also asked to dimenson enginering and they answered me that my choice is ok. For 4 motors I bought 8 resistors