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-   -   Lipo Question! Help! (https://www.rctech.net/forum/electric-off-road/409298-lipo-question-help.html)

asanfilippo 06-18-2010 03:05 PM

Lipo Question! Help!
 
Ok so my friend let me borrow his lipo to put in my hpi blitz that has a castle 7700kv motor and sidewinder esc. It ran and drove like a beast but then we put it in again and it wont go forward nor backwards but the esc lights up green for forward and red for backwards and yellow for neutral still...BUT The truck is still able to steer! Whats wrong? we checked the battery and it's almost fully charged.

Help me out! Thanks!

Casper 06-18-2010 03:09 PM

Check all your motor lead wires. Is the BL motor sensored? The sensor wire may be bad as well.

asanfilippo 06-18-2010 03:28 PM


Originally Posted by Casper (Post 7559736)
Check all your motor lead wires. Is the BL motor sensored? The sensor wire may be bad as well.

How can you tell if it's censored?

The part i don't get is we put in the lipo ran it for awhile then ran it a few more separate times then it did whats stated above....but meanwhile I can throw in a NiMh battery and it will run fine. :confused:

Casper 06-18-2010 03:59 PM

So it runs fine with nimh but not with the lipo? That is very odd. You say you checked the voltage of the lipo and it is above 7V? I am not all that familure with the sidewinder so not sure if there may be some other setting in there that my be messing with stuff.

Sensored motors have a separate sensor wire that plugs into the back of the motor. I am assmuing your setup is sensorless though.

asanfilippo 06-18-2010 04:10 PM


Originally Posted by Casper (Post 7559870)
So it runs fine with nimh but not with the lipo? That is very odd. You say you checked the voltage of the lipo and it is above 7V? I am not all that familure with the sidewinder so not sure if there may be some other setting in there that my be messing with stuff.

Sensored motors have a separate sensor wire that plugs into the back of the motor. I am assmuing your setup is sensorless though.

Yeah, Mine is sensorless... this is really stumping me! I plugged the lipo in and i said full charge at 7.4v

mudboger07 06-18-2010 04:45 PM

Make sure the lipo cut off on the esc is set correctly,

Casper 06-18-2010 05:03 PM

Full charge for a 2S lipo is 8.4V

asanfilippo 06-18-2010 05:10 PM

Whoop!!! I figured it out! Thanks guys!

Casper 06-18-2010 05:48 PM

Well what was it????????

asanfilippo 06-18-2010 06:49 PM


Originally Posted by Casper (Post 7560152)
Well what was it????????

It was drained past the lipo cut off for the esc. I'm dumb! haha I just got my charger today and didn't know how to read it. turned out it was dead. so charged it up and all 3800mah are there after a 50 minute charge

Casper 06-18-2010 08:52 PM

Sweet. Glad it was a simple fix! :D

FrostyDude 06-18-2010 09:05 PM


Originally Posted by asanfilippo (Post 7559787)
The part i don't get is we put in the lipo ran it for awhile then ran it a few more separate times then it did whats stated above....but meanwhile I can throw in a NiMh battery and it will run fine. :confused:

So once you charged the Lipo battery everything worked again?

asanfilippo 06-18-2010 09:46 PM


Originally Posted by FrostyDude (Post 7560743)
So once you charged the Lipo battery everything worked again?

Yup :D

asanfilippo 06-18-2010 09:47 PM


Originally Posted by Casper (Post 7560711)
Sweet. Glad it was a simple fix! :D

Yes I'm happy! :D:D:D


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