I have a FlySky FS-T4B (tx) and a FS-R6B (rx) that bind with a solid red rx light, but as soon as I plug a servo in, the solid red light starts a quick on/off while making a clicking noise and no servo will operate. Is this something simple? I would appreciate any insight. Just finished building the plane, and I want to fly.
Flysky Help Needed
- Thread starter wdiamond
- Start date
FDS
Elite member
Firstly, what is the power output of your Bec? It may be your old servos are simply drawing too much power and “browning out” the BEC.
The bind plug does go into the Bat port, but the BEC goes into Ch3. Make sure the BEC plug is orientated right, the ground wire (brown or Black) is on the pin nearest the outside edge of the RX, with red in the middle and orange/yellow or white (signal) nearest the main body of the RX.
The bind plug does go into the Bat port, but the BEC goes into Ch3. Make sure the BEC plug is orientated right, the ground wire (brown or Black) is on the pin nearest the outside edge of the RX, with red in the middle and orange/yellow or white (signal) nearest the main body of the RX.
The power source is a 4 AA nicad pack and the plane has a .20cc gas piston engine. I have a switch between the battery and the rx plugged into the top slot and I have a solid red bind. ANY servo in any slot changes the solid red to blinking on and off red wout any tx function.
Yes, after you bind, power off Rx then Tx. You need to power off to get Tx & Rx out of bind mode. You can plug servos in any time, they may or may not respond while in bind mode.
In 99.9% of the time you should power on Tx before you power Rx. When turning off, first. Rx then Tx. This is to prevent your motor from starting unexpectedly. The ONLY time to should power Rx before Tx is when binding. Make sure the Rx is in bind mode before powering Tx. Receiving a signal could prevent Rx from entering bind mode. When binding ALWAYS remove the prop or otherwise disconnect the motor.
Could you post a picture of your Rx with the servos plugged in?
Timinatorg
New member
I would be suspicious of that nicad pack if it's also very old. Voltage output under load may drop too much. I've used servos from the late 80s with the FS-R6B so I think your servos should work. Some servos were wired differently back then, the positive (red) wire has to be in the middle on every system these days I believe.
Does the fact that the FlySky rx to servo connection comes out of the rx using ibus? Do the older servos need a different protocol? I have tested the pins on the rx for servos and found each has a 5v reading. 5v should be enough voltage right? I have read that my battery pack (4 AA energizer batteries in a series) may not be sufficient to power more than three servos without having power issues. I have spent hours on construction and want to fly...... The engine is gas powered, so I don't have an 11v power supply that goes through a regulator or anything. The 4 battery pack is being plugged directly onto the rx power pins. Also, I can't get a solid red rx light with even one servo plugged into the rx. I am thinking that the ibus protocol is not working with any of my current servos. Again, thank you for all your responses, each has helped and I will get this in the air someway or another (even if I have to just throw things out my window in frustration..)
Hai-Lee
Old and Bold RC PILOT
I suggest that you measure the 5V rail going to the Servos. It might be that your servo is "chirping" because the supply voltage is actually unable to support the load connected. This would cause the Servo to try and move as the voltage is applied BUT the moment the servo powers up its motor the supply drops switching the servo and Rx off. With everything off the supply voltage resumes and the cycle starts all over again.
Just my thoughts on what to check!
Have fun!
I took the casing off the servo and got 5v to the board in the servo, but the motor in the servo does not seem to be getting any voltage. I just may have some bad servos. I will test the other three I have, but I can't believe every one is bad. Do servos quit working regularly?
Timinatorg
New member
The FS-R6B is not an ibus receiver. Is it an FS-iA6B? The ibus connector would not be used for your setup.
Timinatorg
New member
Yes it supports analog servos. A picture of your setup may be helpful.
Are you trying to control the servo with ibus?
Servos need PWM, ibus is for a flight controller.
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