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HomeAircraftHelicopterBeginners Corner › SBEC trouble
01-24-2012 02:07 PM  6 years agoPost 1
garya

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Daleville, Alabama. USA

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Need a little help I have a HK600GT w/Align motor,turnigy K-force 100A esc,spectrum 6200 reciever,tower pro MG995 servos on cyclic,futube 401 gyro with mg995 servo,turnigy 5A 8-40V sbec with switch,2100 mah 2s 30c reciever battery. know the problem if I use the built in esc every thing works alright, but if I use the external sbec the reciever flashes all the time and servos move irrotic(forward cyclic,rudder servo moves,move rudder and the cyclic servos move and some times they will move with no input at all twitching). the batteries are fully charged also the main motor will still run while using the external sbec. I did unhook the red wire from the esc before I tried using the external sbec.ANY IDEAS

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01-24-2012 04:12 PM  6 years agoPost 2
RCHSF

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NC

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Believe Mrdan has it nailed. Bet you did not have a reciever pack hooked up.

Edited, I saw my error.

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01-24-2012 04:19 PM  6 years agoPost 3
mr dan

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Stockton Calif

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If you are using a reciever battery for the electronics and a lipo for the motor, there should be no problem. It depends on how you wired it up. Your reciever battery should be connnected to your sbec, that in turn plugs into the "battery" port on the rx the ESC with the red power wire removed from the plug is connected to the Throttle port on the rx. Your sbec, what voltage output is it programed to? The MG995's can only operate at 4.8v you neeed to be certain your sbec is programed to 4.8 - 5.0v if possible.

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01-24-2012 04:20 PM  6 years agoPost 4
mr dan

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Stockton Calif

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Did you remove the Orange Signal wire from the Main ESC? That has to be removed before useing a External SBEC I believe.
its not the orange signal wire to be removed, its the red power wire.

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01-24-2012 06:19 PM  6 years agoPost 5
garya

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Daleville, Alabama. USA

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Thanks for the info the sbec is set up for 6 volts, I will change that and see if that corrects problem. I did remove the RED wire from the ESC, again thanks.

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01-25-2012 12:10 PM  6 years agoPost 6
garya

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Daleville, Alabama. USA

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Ok I changed the esc output voltage to 5v, nothing changed still the same as before. Any more ideas

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01-25-2012 03:04 PM  6 years agoPost 7
WannaBe4D

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AL-A-BAMA

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Ok I changed the esc output voltage to 5v, nothing changed still the same as before. Any more ideas
Do you mean you changed the BEC output voltage to 5v?

If this is the case, use a multimeter and check to see if you're getting 5v on the output side of the BEC.

I had a similar issue once that was caused by low voltage to the RX.

Most of the time, I can be seen having more ambition than skill.

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01-25-2012 06:18 PM  6 years agoPost 8
mr dan

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Stockton Calif

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Correct, its not the ESc that need to be changed , its the BEC that feeds the electronics. Do you have it installed the way I described, ESc to throttle (no red wire), SBEC seperate from ESC to Battery port on RX? Remember you are powering two items seperatley here, do not piggy back the SBEC's red(Power) and Black (ground) onto the ESC's power and ground wire. The ESC is providing power only to the motor there is no power output to the Rx on the other end only signal and a ground path, the rx is to recieve power directly from the SBEC via the Battery port.

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01-25-2012 08:25 PM  6 years agoPost 9
garya

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Daleville, Alabama. USA

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Mr Dan I did remove the Red wire but not the black from the ESC I will try that tonight. Thanks

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01-25-2012 08:31 PM  6 years agoPost 10
garya

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Daleville, Alabama. USA

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Correction: Mr Dan I looked at your diagram wrong, I did remove the red wire only and that still didn't work. I am going to check the output voltage coming out of the BEC to make sure it is right.

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01-26-2012 02:55 PM  6 years agoPost 11
garya

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Daleville, Alabama. USA

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The voltage from the output on the ESC is 5.1v, the wireing apears to be correct but problem is still there, any more ideas welcome and thanks for the help so far

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01-26-2012 06:53 PM  6 years agoPost 12
mr dan

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Stockton Calif

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try the SBEC without the switch (On/off) Just solder a deans or what ever plug you need to use the rx battery you have (JST?) then go through this sequence. plug in the rx battery, let the rx bind to the Transmitter (TX), next, plug in the 6s lipo to power your motor (make sure you have the throttle stick all the way down or your Thro hold switch on) You may be not giving the Rx time to bind properly. I use basically the same setup My SBEC is a castle creations, but I dont use an on and off switch, my SBEC has a male deans, I plug in the SBEC to my rx battery, let bind, then I plug in my main lipo to the ESC.

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