Running ESC w/BEC and 2nd BEC, Need help troubleshooting
04-29-2008, 05:38 PM
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Running ESC w/BEC and 2nd BEC, Need help troubleshooting
Have a large scale 1:8 or 1:6 project truck that I am having trouble getting the ESC and BEC to work well on.
Heavy chassis - 20lbs
Hacker Brushless A30-8XL (1100kv)
Quark 33 Universal ESC
Tamiya High Lift 3spd
Tower Hobby MG995 steering servos (1fr, 1Rr)
Cheap servo doing the trans shifting.
Cheap X'tal FT06-B Tx/Rx
Finally got the ESC to do forward and reverse.
With only BEC (5v3amp) from Quark ESC, the steering is sluggish, weak, sometimes not responsive.
I soldered up my own heavy gauge servo harness/pigtail.
As it stands right now, Quark ESC BEC is plugged straight into ch3. This provide power to the Rx and transmission servo.
Then I have a second, stand alone BEC, plugged into my pigtail harness. This harness has the red and black wire from the BEC going to the red and black wires of the front and rear MG995 servos. The black neutral also goes to the Rx, as well as the orange signal to the Rx.
This setup works well, ie. steering has a lot of power. Except, when you get above 1/4 throttle, you loose 100% of the steering control? In fact, if you are turning the wheels while you accelerate, the wheels stay locked in the turned position, until you take the throttle back to neutral, then the steering servos return to their neutral position.
I doubled checked my BEC pigtail, and it is not returning power to the Rx.
Help?
Cross talk?
Second test:
When I plug the ESC through a different pigtail, removing the red wire, and plug the stand alone BEC into the Batt on the Rx, steering works fine, but I get no ESC control at all. In fact the ESC gives a funny single beep and no lights upon power up.
Hmmmmmmm?
Is it the funny cheap radio (made for Euro) that I am using?
Other ways to get steering servos the power they need?
Any help appreciated.
thx
Heavy chassis - 20lbs
Hacker Brushless A30-8XL (1100kv)
Quark 33 Universal ESC
Tamiya High Lift 3spd
Tower Hobby MG995 steering servos (1fr, 1Rr)
Cheap servo doing the trans shifting.
Cheap X'tal FT06-B Tx/Rx
Finally got the ESC to do forward and reverse.
With only BEC (5v3amp) from Quark ESC, the steering is sluggish, weak, sometimes not responsive.
I soldered up my own heavy gauge servo harness/pigtail.
As it stands right now, Quark ESC BEC is plugged straight into ch3. This provide power to the Rx and transmission servo.
Then I have a second, stand alone BEC, plugged into my pigtail harness. This harness has the red and black wire from the BEC going to the red and black wires of the front and rear MG995 servos. The black neutral also goes to the Rx, as well as the orange signal to the Rx.
This setup works well, ie. steering has a lot of power. Except, when you get above 1/4 throttle, you loose 100% of the steering control? In fact, if you are turning the wheels while you accelerate, the wheels stay locked in the turned position, until you take the throttle back to neutral, then the steering servos return to their neutral position.
I doubled checked my BEC pigtail, and it is not returning power to the Rx.
Help?
Cross talk?
Second test:
When I plug the ESC through a different pigtail, removing the red wire, and plug the stand alone BEC into the Batt on the Rx, steering works fine, but I get no ESC control at all. In fact the ESC gives a funny single beep and no lights upon power up.
Hmmmmmmm?
Is it the funny cheap radio (made for Euro) that I am using?
Other ways to get steering servos the power they need?
Any help appreciated.
thx
