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750mx Quite Hot after 1 battery

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  • #1

    750mx Quite Hot after 1 battery

    I flew my DFC HV last night for 2 packs.
    I noticed that after 1 pack, my esc was warm (just warm.. not too bad) but my motor was quite hot - definitely can't leave my fingers on it without saying OUCH!

    Is this because my heli is new? It's only a month old
    Also - can the motor pinion to main gear mesh be adjusted? I noticed white powder on the black main gears and a friend said it feels a tad tight when you rotate the head by hand... (it's actually much better now since my flights last night) but I just want to make sure...

    Do I need to adjust the mesh or do I just need to bed the gears in? (break in period?)

    I have read of motor shafts snapping in flight (on HF forum) so don't want this to happen to me
    Click image for larger version Name: photo.jpg Views: 1 Size: 336.1 KB ID: 1914152

    By the way - my head speeds are:
    N 1750
    i1 1900
    i2 2050
    Last edited by muscleflex; 19-06-2013, 09:06 AM.
    Tags: None
  • #2
    750mx Quite Hot after 1 battery

    Although might not be relevant, when I first set up my Castle Esc I set it up from using the specs of the motor and it flew hot, then I found Castle had specific settings for the 700mx on there web site changed to those and it runs a lot cooler.
    2nd place sports class, Helifest 2015
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    • #3
      ^^Hmm... I'll have a check again. I had mine set to 8khz (from 12khz)

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      • #4
        Hey buddy.

        The 750MX does run a little warm even on the Castle recommended settings. You can lower the PWM rate, which you did already to 8 from 12 which can help. Outrunner mode has been used by some to.

        Where did you set your timing to? Another parameter which can effect other things as well as motor temp.

        The white powder is just the pinion and maun gear meshing into one another and is nothing to worry about. I've just fitted the steel pinion to mine and seeing the same thing again.
        The mesh isn't adjustable, but should not need altering.
        .
        Ian Contessa
        Robbe SchluterUK / Midland Helicopters / Align



        Coolice Power Supplies
        Coolice Custom Built Charge Case's

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        • #5
          Hey Ian - many thanks for that! I can't remember my timing - I'll find out and will post the whole setup.
          Oh - thank you for the bluetooth! It's excellent!
          Am I ok to just leave it on the heli blinking whilst flying even when I don't need to connect to it?

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          • #6
            Here's Castle settings pdf;

            http://www.castlecreations.com/suppo...00MX-530KV.pdf
            .
            Ian Contessa
            Robbe SchluterUK / Midland Helicopters / Align



            Coolice Power Supplies
            Coolice Custom Built Charge Case's

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            • #7
              Originally posted by muscleflex View Post
              Hey Ian - many thanks for that! I can't remember my timing - I'll find out and will post the whole setup.
              Oh - thank you for the bluetooth! It's excellent!
              Am I ok to just leave it on the heli blinking whilst flying even when I don't need to connect to it?
              Morning buddy.

              You're welcome, I've been monitoring my own 750MX lately to now it's getting warmer.

              Glad you like the BT module, thanks for your custom.
              Yes, you can leave it permanently connected and as you've seen it just flashes away to itself. I leave mine on my models, so its there to make quick settings changes if need be.
              .
              Ian Contessa
              Robbe SchluterUK / Midland Helicopters / Align



              Coolice Power Supplies
              Coolice Custom Built Charge Case's

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              • #8
                On run mine on out runner mode and its cooler. But did run hotter on castle spec settings. Mesh is not adjustable unless using kde mounts.

                Check your mesh because it slanted, so if piñon to high or to low will change mesh slightly.
                Santander Factory Team

                Proud wearer of 5 x EGS

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                • #9
                  ok - got my parameters:
                  Motor Tab:
                  Motor Start Power: Medium (59)
                  Motor Timing: Low (0)
                  Direction: Forward
                  PWM Rate: 8KHZ

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                  • #10
                    Originally posted by muscleflex View Post
                    ok - got my parameters:
                    Motor Tab:
                    Motor Start Power: Medium (59)
                    Motor Timing: Low (0)
                    Direction: Forward
                    PWM Rate: 8KHZ
                    try using, then down load logs and will check temp etc, then try out runner mode as I do on all my 700 750mx motors
                    Santander Factory Team

                    Proud wearer of 5 x EGS

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