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Thread: BOB FW Series

  1. #1
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    After my attempt on proto BOB I'm moving on to my real first FW BOB.

    The plan for this one is a 4 wheel drive with a lifter, like S.M.I.D.S.Y. So far this is the lay out for it.
    Untitled.png
    Just need to get a linear actuator and other parts to go with it. Luckily I got some spare MDF boards to use when I get what I need just to make sure the lay out works and a rough idea on the weight, btw the drill motors I'm using are about 440g.

    Knowing my luck when I start, I got the parts I need but not the tools.

  2. #2
    Ocracoke's Avatar
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    Looks good, have you decided on what sort of speed controllers and the shell/bodywork material you are going to use in this?
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  3. #3
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    The speed controllers I'm using are Botbitz 30a ESC and the body will be made of HDPE about 10-12mm thick.

  4. #4
    Maxamuslead's Avatar
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    Quote Originally Posted by sean retro View Post
    The speed controllers I'm using are Botbitz 30a ESC and the body will be made of HDPE about 10-12mm thick.
    us the 85a versions as you can power 2 drill motors of 1 speed controller. so you end up 1 for each side.

  5. #5
    Ocracoke's Avatar
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    Sounds OK although I am not sure 15a per wheel is going to be enough... I might potentially advise using a set of TZ85a speed controllers if the BotBitz controllers aren't up to the job.

    I'd also look through the build threads of Luna-Tic since this does seem similar in concept if there are any.
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  6. #6
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    Quick question, does it matter what type of battery it is like Lipo, acid etc. to power the linear actuator?

  7. #7
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    In short, no. What does matter is how much amperage is being sent to the motor. If there is too much, you'll either burn out the controller or the motor driving the actuator.
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  8. #8
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    Anything with an appropriate voltage / ampage will work so the answer is mainly no it doesn't make much difference, but the chemistry will affect obvious things like the weight and dimensions as well as characteristics like power drop off and charging speed so there probably is an "ideal" battery for your requirements.
    Last edited by lowndsy; 6th September 2017 at 13:47.

  9. #9
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    Amperage won't be a problem, got some spare fuses what we use in plugs, felling that get a different type of fuse.

  10. #10
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    Well I done a bit of soldering for the first time in years.
    1st try.
    20170927_165357.jpg

    2nd try.
    20170927_165537.jpg20170927_165602.jpg

    Working on the safety link just to see how much practise I need and from the looks of it, I'll need a bit. Also more solder.

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