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HomeRC & Power✈️Aircraft🚁Helicoptere-Electric Motors-Controllers-ESCOther › Need help what cause my motor cut off while flying
06-06-2011 04:19 AM  8 years ago
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Tommy8275

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Mount Juliet, TN

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Need help what cause my motor cut off while flying
What cause my 700E and my logo 600SE keping cut off while flying? both heli almost indentical setup ( both full size blue V-bar, Jive 120HV version9, Scorpion 4035-530 on 700 4035-45 on Logo SE, Batteries 12S 5100Mah 35C Volt, Jive gov on both, on my 700 Im running 65% Straight line ST1&ST2 HS 2150 LogoSE 70% straight line. Both heli was flying about 2-3 minutes and motor was cut off some time motor still ran in low HS 400-500 HS. When I land and check the temp on the motor and ESC Motor 170F and ESC 120F batteries 3.9V each cell, my Jive was running mode 4 .Anything wrong with my Jive? or my setup in my Jive?
Tommy K
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06-06-2011 05:56 AM  8 years ago
Stolla

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Port elizabeth South Africa

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Did you perhaps check the led flash indication on the jive after this happened, this is the best indication of what going on, it would help if you could get that data
if i understand correctly ure saying motor rpm was reduced to 4-500 hs? If thats the case it may be your setup in the jive, did you set up lipo mode 9? usually jive will reduce power for 2 things, motor thermal due to overcurrent draw,or if voltage goes too low under load which seems rather the problem in your case as it happened to both your machines.
However the temps u measured on the jive seems a little high, is the jive heatsinked?, if not overcurrent situation may be a possibility. Also what connectors?
Common sense may not be common after all
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06-06-2011 03:11 PM  8 years ago
Tommy8275

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Mount Juliet, TN

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I did not set to mode 9 all I did just go through mode 1-4 and I dont have heat sink install on my Jive I also use bullet connector between scorpion motor and Jive I did note after I land my batteries wire was kinda warm. Do I have to set to mode 9? this is my first Jive and electric heliTommy K
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06-06-2011 03:22 PM  8 years ago
TonyC.

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CA

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Stolla,

What's mode 9?
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06-06-2011 07:13 PM  8 years ago
Stolla

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Port elizabeth South Africa

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Ok u definately need to put a heatsink on, jive can then do double amps according to kontronik. Make sure your bullets are well soldered, (gas flame works better than soldering iron)
Dont worry about mode 9 lipo mode from the manual
"This mode is programmed additionally to change
the under voltage disconnection to 2,7-3V/cell
when using LiPo batteries.
To realize under voltage disconnection the audio
sequence during battery connection is changed.
The number of audio signals confirms the number
of identified LiPo cells.

My guess is heatsink will solve your problem
Common sense may not be common after all
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06-07-2011 12:54 AM  8 years ago
Tommy8275

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Mount Juliet, TN

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Ok I will order one of those heat sink today on the bullet connectoer, I will resoldering Im using soldering gun with 230/150 watt and I also using more silver to make sure they have more bondTommy K
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06-07-2011 05:52 AM  8 years ago
Stolla

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Port elizabeth South Africa

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Easy way to solder the connectors is to tin the wires with iron then clamp the bullet upside down with crocodile clip, heat it up with gasflame and make a solder puddle inside bullet while simultaneuosly sticking the wire into the bullet then keep it still while cooling. Much quicker, easier and more effective. Use at least ec 5's or similar 5mm bulletsCommon sense may not be common after all
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06-07-2011 02:22 PM  8 years ago
Volidas

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Thessaloniki-Greece

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Good afternoon to all.
Just a thought. Maybe after a repair or changing setup the pitch range has been changed. If the pitch reaches at +15 at a full throttle stick input, it could be possible that the motor pulls very high current that the ESC cannot handle and switches off to protect itself. A current log if exist would help find out (and of course a second check at the pitch range).
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