Throttle Servo Connection

[Jimbob]

Hi All.

Just setting up my first flybarless and I have a Spirit on a TRex 600n DFC

I have everything working OK, but I cannot seem to find in the manual (or anywhere) much info regarding the nitro throttle and governor setup.

I cannot even get the throttle servo working from the Spirit.
Where does the throttle servo connect to?

Cheers,
Jim

My setup is:
Futaba T16SZ,
Futaba R2008SB HV over S-Bus
Spirit controller
Futaba S3470SV for throttle
Spartan Governor Sensor.

[ZeXx86]

Hi,

you can find the details in our manual and also Spirit Settings.
Please check this page:
http://manual.spirit-system.com/index.p ... TOR_WIRING

[Jimbob]

Hi,

you can find the details in our manual and also Spirit Settings.
Please check this page:
http://manual.spirit-system.com/index.p ... TOR_WIRING

Hi, and thanks for the reply.

I have tried connecting the servo to the AUX connector as per the description in your link, and I have also assigned throttle to channel 1 in the rx settings page.
The throttle servo just doesnt move - it doesnt even seem to have any power from the AUX port.

If I plug it directly into the RX it moves OK, but I want to use the governor function.

Is there anything else I should look at?
Jim.

[ZeXx86]

Is your receiver connection working with Spirit unit? You can check it in the Diagnostic tab. You will see a movement of the channels.

If your radio is off then the servo will behave as a dead.
Other explanation could be that the servo is connected in the opposite way.

It should also move when you connect it to any other position such as CH1,2,3,4.

[Jimbob]

Hi.


When I move the Tx throttle I see the throttle bar moving on the diagnostics screen.
If I connect the throttle servo to say CH1, then it will move with the cyclic.
If I connect it directly to the Rx then it moves ok.

It seems that the AUX output is not working or some reason.

Jim

[Jimbob]

I just checked and there is about +8v between the power pins of the AUX connector.

[ZeXx86]

Very well.
Please make sure that the Throttle channel is really assigned in the General/Channels window.
If changing Receiver type it will unassign.

[Jimbob]

Very well.
Please make sure that the Throttle channel is really assigned in the General/Channels window.
If changing Receiver type it will unassign.

Hi
So I checked that the Throttle channel is set to 1, and it says it is.
I tried changeing it to another channel and then back again - no change,

I have now put a S148 servo on the aux connector - on power up, the Spirit drives the servo completely CCW where is stays, buzzing.
Nothing I can do changes this.

The other S3470SV servo still works fine directly connected to the Rx but is totally dead on the Spirit AUX connector.

Very strange - any more ideas for me?

Cheers,
Jim

[urgno]

maybe the throttle frequency/pulse is not the right one for the servo you connected ?

NOTE1 the spirit throttle actually support 1520μs servos

NOTE2 the S148 just support 4.8V - 6.0V ... you wrote you have 8V so be careful

NOTE3 the S3470SV is SBUS2 servo, are you sure it will work with pwm signal ?

[Jimbob]

maybe the throttle frequency/pulse is not the right one for the servo you connected ?

NOTE1 the spirit throttle actually support 1520μs servos [/quote]
I will look into the freq/pulse as a possible point of issue. What throttle servos are people using generally?

NOTE2 the S148 just support 4.8V - 6.0V ... you wrote you have 8V so be careful

Yes thanks. I have used a 6v NiMh when testing with the S148.

NOTE3 the S3470SV is SBUS2 servo, are you sure it will work with pwm signal ?

I knew it was SBUS2, but it works fine direct from a PWM port on the Rx, so I was thinking that proved its suitability. Is this not the case perhaps?

Thanks very much for your input,
Jim