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« on: January 03, 2018, 04:41:18 PM »
Manojkumar Kasiviswanatha
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Hi All,

I am new to this forum and Rc world too...

I am building my own model(beginner model).

Last week when I went for Test fly, I hit my throttle high for hand launch but  my motor got stopped in the high throttle and when I reduce  the throttle it will work fine.

Many times I tested and finally smoke came from motor and ESC with some lead smell

Can anyone help me what went wrong?

Please find my specification which I attached  as photo.
photo-1918802009.jpg
Motor and Esc got burnt
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« Reply #1 on: January 03, 2018, 06:26:45 PM »
RAHUL QUADY
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mosfets got burnt in your esc.
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« Reply #2 on: January 03, 2018, 06:28:59 PM »
Manojkumar Kasiviswanatha
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Can you explain in detaile which will help me to understand and avoid in future pls

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« Reply #3 on: January 03, 2018, 06:31:09 PM »
K K Iyer
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Hi,
Welcome to this forum.

Looks like your motor, battery, Esc and prop are correctly matched.
In the normal course there should not have been any problem.

Other possible issues are:
1. Did you by any chance use a much larger prop?
2. Did you calibrate the throttle?
3. Did the motor ingest any dirt?
4. Was the motor smooth if spun by hand without power, or did it feel like the bearings were bad or the rotor was touching the magnets in some places?
5. Did the motor and Esc have access to cooling airflow or not?

Can you post pics of the setup as they were when you had the problem?

Also, does it still run at low throttle, or is it dead?
Regards
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« Reply #4 on: January 03, 2018, 06:38:01 PM »
sanjayrai55
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Don't wake a Tiger until you've factored the teeth
"Many times I tested and finally smoke came from motor and ESC with some lead smell"
Could you elaborate? Are you sure both motor and ESC are burnt? Which prop did you use - not clear from the picture
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« Reply #5 on: January 03, 2018, 06:58:46 PM »
unidrakeshrc
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Dear Friend,
For 2140KV use 30Amp esc and use prop 6x4E. Iam using the same setup and it works fine. Regards
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« Reply #6 on: January 03, 2018, 07:54:09 PM »
Manojkumar Kasiviswanatha
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1. Did you by any chance use a much larger prop?- I only used 6x3E
2. Did you calibrate the throttle?-I didnt calibrate before i used....after i smoke came just google and found we need to calibrate can u tell the steps
3. Did the motor ingest any dirt?I also have the  same doubt as many times i didnt hand launch and it got landed in ground[/color]
4. Was the motor smooth if spun by hand without power, or did it feel like the bearings were bad or the rotor was touching the magnets in some places?-its not spining like old Sad

5. Did the motor and Esc have access to cooling airflow or not?-yes


Also, does it still run at low throttle, or is it dead?--when smoke came i testes it was working but i am afraid to plugin again as it may damage my lipo/lipo catch fire
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« Reply #7 on: January 03, 2018, 07:59:43 PM »
Manojkumar Kasiviswanatha
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Thanks mate will check on that too Smiley
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« Reply #8 on: January 03, 2018, 08:05:11 PM »
K K Iyer
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Throttle calibration
Turn on Tx. Move throttle stick to full.
Connect battery to Rx.
Wait for a long beep indicating that Esc has understood full throttle position.
Lower throttle stick to idle.
Wait for a long beep indicating that Esc has understood idle throttle position.
Switch off Rx and then Tx.

Power up Tx, then Rx, with throttle stick in idle.
Test motor by opening throttle a little at a time.
Best of luck. Hope your motor and Esc didn't die...
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« Reply #9 on: January 03, 2018, 08:10:09 PM »
Manojkumar Kasiviswanatha
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Thanks for the reply mate... Is that safe to plug in in esc and motor and check?Huh?? Will it spoil my battery...
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« Reply #10 on: January 03, 2018, 08:18:32 PM »
kiran rc
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Are the bullet connectors between ESC and motor soldered correctly? A bad joint can increase current draw and ultimately burn the ESC.
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« Reply #11 on: January 03, 2018, 08:27:27 PM »
Manojkumar Kasiviswanatha
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Thanks for replying.... Solder was because I didn't solder.... When i bought it came with solder
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« Reply #12 on: January 03, 2018, 08:30:05 PM »
rishabhbarma
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Just don't buy wolfpack/avionic shit.
Their escs, servos suck. Motors are decent.
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« Reply #13 on: January 03, 2018, 08:33:02 PM »
Manojkumar Kasiviswanatha
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In Banglore I don't have other options.....
Can u tell which esc and servos are good???
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« Reply #14 on: January 03, 2018, 08:39:56 PM »
rishabhbarma
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« Reply #15 on: January 03, 2018, 09:12:38 PM »
K K Iyer
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Quote from: kiran rc on January 03, 2018, 08:18:32 PM
Are the bullet connectors between ESC and motor soldered correctly? A bad joint can increase current draw and ultimately burn the ESC.

@kiran rc,
Bad joint increases resistance? Or current draw?
 Head Scratching
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« Reply #16 on: January 03, 2018, 09:15:53 PM »
K K Iyer
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Quote from: Manojkumar Kasiviswanatha on January 03, 2018, 08:10:09 PM
Thanks for the reply mate... Is that safe to plug in in esc and motor and check?Huh??
yes
Will it spoil my battery...
no

Will not draw any current if throttle is at low while connecting.
Get a helper to disconnect if any sign of smoke etc.
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« Reply #17 on: January 03, 2018, 09:46:43 PM »
Manojkumar Kasiviswanatha
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I just connect and check... I can see some kind of fire in esc.... But my motor still give beep sounds.... I get to know my esc gone... Wat about my motor?Huh?
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« Reply #18 on: January 03, 2018, 10:52:04 PM »
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Your Motor is still OK. Do not connect again or your motor will burn too. Use 30Amp esc. Regards
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« Reply #19 on: January 03, 2018, 10:53:37 PM »
Manojkumar Kasiviswanatha
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Thanks for the reply will buy new one and check
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« Reply #20 on: January 03, 2018, 11:57:11 PM »
kiran rc
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@KK Iyer
Sir, I was referring to the back emf of the Esc. If one of the connectors is bad,  then Esc might send pulses at wrong time and hence cause twitches. This can draw a large amount of current and generate a lot of heat.
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