This is the first time I have a plane that needs more than 8 channels. It seems the easiest solution is to add an sbus/cppm channel decoder, however there aren't any in stock and haven't been for a while. What other options do I have to get more than 8 channels? I'm currently using an X8R receiver with the original Taranis radio.
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What do I do when I need more then 8 channels?
- Thread starter Laury415
- Start date
Sorry, we have them on order, but FrSky has not sent them yet. We do have the single channel decoder in stock if you are only adding one or two more servos.. Otherwise, some other options:
- A second receiver - The X6R and the X8R can be setup to output the additional channels. (I have not tested it, but with the new versions of open TX, it asks how you want to bind, with or without telemetry and what channel ranges, so you may be able to use other X series receivers in this manner. The second receiver must have the telemetry turned off.)
- Use another brand of Sbus decoder. We used to sell the XPS X10, it is a solid option. Currently, stay away from Dualsky, theirs does not work with FrSky gear yet.
- Use Sbus servos - We do not currently offer any as we have not been happy with the ones we have tested. I think Corona makes some OK examples for budget minded builds.
Can you give me information about the single Channel decoder? I didn't see that as an option on your website. Yes, currently I only need one additional channel so that would work fine.
Also, where can I find out information about the XPS X10? I didn't see it on your website either and would like to at least know what it is in case I want to go that route.
Thanks
Also, where can I find out information about the XPS X10? I didn't see it on your website either and would like to at least know what it is in case I want to go that route.
Thanks
Konrad
Very Strong User
Wayne, this concerns me as I have more than a few FrSky Sbus servos and FrSky S-bus converters.
https://alofthobbies.com/frsky-sd1-sbus-converter.html
What were the performance concerns with these servos. The Futaba servo seem to work other than draining ones bank account.
Konrad posted the link to the single channel above.
The FrSky servos didn't have the accuracy or quality of gear train we expected at the price point. Some folks reported connection issues as the PWM and or Sbus function didn't always work as intended. I think FrSky still offers them, but not many shops offer them anymore. I'll happily pick them up again once they address the issues.
The FrSky servos didn't have the accuracy or quality of gear train we expected at the price point. Some folks reported connection issues as the PWM and or Sbus function didn't always work as intended. I think FrSky still offers them, but not many shops offer them anymore. I'll happily pick them up again once they address the issues.
Konrad
Very Strong User
Wayne, Good to know, thanks.
I don’t see any servos on the FrSky site.
As to customer expectations I still recall being happy to buy a Futaba S133 for $30 plus and was happy. But today I can get a KS PDI-0902MG for $10 while the FrSky C2100 went for $27. But when you look at adding the price of the S-bus converter the $7 premium for the FrSky C2100 doesn’t look all that bad.
For what its worth, I have a dozen FrSky servo all have linked up using both S-bus and PWM. All have withstood my 5 minute burn in test. As to gear train all appear to be fine. They are as smooth as their KST counterparts. Now they may have a bit more back lash than the KST.
I’m shocked at how poor many fliers are at setting up servos. I often get mid ranged models at auction and am dumbfounded to learn that these guys have set them up to use only 30% of the servos rotation. This really is crippling the servo. I like to set up my servos to use 100% to 120% of the servo rotation. This is to get the best possible resolution and power out of my control set up. It also mitigates any gear train back lash. True it does cost me servo (control surface) speed.
I have yet to fly a FrSky servo so I’ll keep a close eye on centering. But by the bench testing all looks good. The servos I have are the C2100 and D25SA.
I also haven’t wired up the converters to other brands of PWM servo.
All the best,
Konrad
I don’t see any servos on the FrSky site.
As to customer expectations I still recall being happy to buy a Futaba S133 for $30 plus and was happy. But today I can get a KS PDI-0902MG for $10 while the FrSky C2100 went for $27. But when you look at adding the price of the S-bus converter the $7 premium for the FrSky C2100 doesn’t look all that bad.
For what its worth, I have a dozen FrSky servo all have linked up using both S-bus and PWM. All have withstood my 5 minute burn in test. As to gear train all appear to be fine. They are as smooth as their KST counterparts. Now they may have a bit more back lash than the KST.
I’m shocked at how poor many fliers are at setting up servos. I often get mid ranged models at auction and am dumbfounded to learn that these guys have set them up to use only 30% of the servos rotation. This really is crippling the servo. I like to set up my servos to use 100% to 120% of the servo rotation. This is to get the best possible resolution and power out of my control set up. It also mitigates any gear train back lash. True it does cost me servo (control surface) speed.
I have yet to fly a FrSky servo so I’ll keep a close eye on centering. But by the bench testing all looks good. The servos I have are the C2100 and D25SA.
I also haven’t wired up the converters to other brands of PWM servo.
All the best,
Konrad
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Konrad
Very Strong User
Here is the manual for converting the PWM servo to an S-bus servo.
https://www.frsky-rc.com/sd1/
Look up S-Bus. The "aha" moment for me was realizing that S-bus is a communication standard that all OEM's that claim to use S-bus have adopted. This is a serial (hence the "S") communication protocol. The channel changer tells the servo what data packet on the serial bus to respond too (monitor).
The standard RX will ignore any data packets out past ch8 (in the case of your 8 channel RX). The 8ch RX converts the data packets to PWM pulses and distributes this to the 8 output pins (just like an old style Rx). Now the neat thing about the FrSky RX is that you can still see the other data packets ( 9 through 16) by plugging into the S-bus pins (don't confuse this with the S.Port [Smart Port]). If the servo is on the S-bus the servo now needs to do what the RX did for the first 8 data packets. In your case you will need to tell the S-bus servo to look at the data pack numbered 9. That's what the Channel Changer does. It assign the servo to respond to the corresponding data packet.
https://www.frsky-rc.com/sd1/
Look up S-Bus. The "aha" moment for me was realizing that S-bus is a communication standard that all OEM's that claim to use S-bus have adopted. This is a serial (hence the "S") communication protocol. The channel changer tells the servo what data packet on the serial bus to respond too (monitor).
The standard RX will ignore any data packets out past ch8 (in the case of your 8 channel RX). The 8ch RX converts the data packets to PWM pulses and distributes this to the 8 output pins (just like an old style Rx). Now the neat thing about the FrSky RX is that you can still see the other data packets ( 9 through 16) by plugging into the S-bus pins (don't confuse this with the S.Port [Smart Port]). If the servo is on the S-bus the servo now needs to do what the RX did for the first 8 data packets. In your case you will need to tell the S-bus servo to look at the data pack numbered 9. That's what the Channel Changer does. It assign the servo to respond to the corresponding data packet.
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Konrad
Very Strong User
Husein,
Thank you. From my perspective this is the function of these forum, to exchange accurate information. Some may use them as a social replacement for actually going out to the field. Others might use them to collect marketing data (not that Wayne is a Facebook Zuckerburg).
Now I need to thank others that have contributed to my knowledge base. It is threads like this that help lift the veils of ignorance, well at least from my eyes.
https://forum.alofthobbies.com/inde...f-s-bus-as-there-are-so-few-s-bus-servos.128/
Thank you. From my perspective this is the function of these forum, to exchange accurate information. Some may use them as a social replacement for actually going out to the field. Others might use them to collect marketing data (not that Wayne is a Facebook Zuckerburg).
Now I need to thank others that have contributed to my knowledge base. It is threads like this that help lift the veils of ignorance, well at least from my eyes.
https://forum.alofthobbies.com/inde...f-s-bus-as-there-are-so-few-s-bus-servos.128/
