FrSky X4r bad servo channel?

[kenp51d]

Hi
I am pulling my hair out (what I have left anyway)
I bought a Several items including a Horus X10 and 2 receivers, A X4r and S6r.
I charger transmitter and then sit every thing aside till last week. I worked up the nerve to flash the Tx to opentx 2.2.4 after finding a nice club that's cheap and getting 3 planes near airworthy.

I had zero issues with the 6ch Rx, but the X4r is driving my nuts. The aileron,elevator, and throttle channel work just fine. But the Rudder channel jitters like crazy and does not respond to the stick.
The Tx channel range is set to 1-4, mode is D16.
I din't use any jumpers when binding.
This Rx is going in a 4 channel trainer using futable s148 servos.
Do I need to jumper something when binding?

Ken

 

[Konrad]

Which X4R? Some are actually 3 channel with the "4th channel" being the 16 channel S-Bus output.

This is the 3 ch PWM RX. Note the 3/16 designation.

X4R-SB - 3/16 channel, Sbus, Smart Port Receiver

FrSky's X4R-SB receiver features 3/16 channels (3 PWM outputs and a full 16 on Sbus) plus the new Smart Port so you can plug in telemetry sensors.

alofthobbies.com

Couldn't find this on on aloft sales page so I had to go to the FrSky site. This is the 4 ch pwm rx.

X4R - FrSky - Lets you set the limits

X4R receiver features 4 PWM outputs (normal servo) and now includes an option for CPPM output for feeding to flight controllers or other uses.

www.frsky-rc.com

 

[kenp51d]

Yeah I realized that there are 2 different units, after a lot of farting around and after my original post.
So I pulled up the original order. Ken
FrSky X4R-SB - 3/16 Channel Receiver with Sbus and CPPM


Ken

 

[Konrad]

So it is working as designed?

Have you removed the case (paper wrapping). The nomanclature should tell us what you have. Not sure I'd trust my sales invoice.

All the best,
Konrad

 

[kenp51d]

Definitely says X4R
I made a jumper and jumped the signal pins for channels 2 and 3 while rebinding. Didn't make a bit of dif.

Ken

 

[Konrad]

Definitely says X4R
I made a jumper and jumped the signal pins for channels 2 and 3 while rebinding. Didn't make a bit of dif.

Ken

They both say that.
The black covered should say "3/16 channel Telemetry"
The white covered one is th 4ch PWM RX it should say "4ch Telemetry"


Jumping signal pins 2&3 will get you into CPPM or S-Bus modes. The old analog Futba 148 is a PWM servo. Not sure where you are going with the jumpers.

https://www.frsky-rc.com/wp-content/uploads/2017/07/Manual/X4R%20X4RSB%20CPPM.pdf

RC radio control protocols explained: PWM, PPM, PCM, SBUS, IBUS DSMX, DSM2

This guide will explain the various radio control receiver protocols that you are likely to come across in this drone hobby. So next time it comes to buying some new R/C receiver, or setting up your R/C receiver with your flight controller you will know exactly what all the acronyms mean and...

www.dronetrest.com

Making up jumpers? Didn't the RX package come with jumpers?

All the best,
Konrad

 

[kenp51d]

Thanks
Konrad and all the rest of you guys

Mine is the black X4R , Sbus on the 4th channel, not pwm. That is the crux of the issue. Need the white one.
Did come across a way to convert it to pwm on all 4 channels.
X4R – SBUS Mod How To
How to change the 4th channel to SBUS
Next week when I have time again I will take a look at converting it. or just wait till next month and buy another Rx

Ken