Originally Posted by Quasi_Mojo
I've got everything boxed up and will be dropping it off at LHS after work for them to look at and will post their findings.
I thought I would take some time and update anybody who cares about my struggle with using the Futaba 10CAP with the Radian Pro.
I dropped the Radian Pro and Futaba Tx off at an LHS (again) Monday after work and they had it until Friday (today) until about 5:30, when I picked it up. Once again, they failed to diagnose the issue and get the pair working together. They were able to use a Spectrum DX8 and a Spectrum Rx in the RP without issues. I called them on Friday morning to make sure that they attempted to call Futaba support during their support hours in case they couldn't figure it out. I was advised that Futaba walked them through the setup and they still couldn't get it to work.
In my desperation to figure out what was wrong, I purchased a replacement receiver, an R6008HS
(manual link), this time - to try instead of the R6014FS
(manual link) that came with the Futaba 10CAP. I removed the 14 channel Rx and popped in the 8 channel Rx, powered on the Transmitter, then plugged in the battery on the RP. I checked the LED activity on the Rx and noticed it was blinking green (the R6014FS always only showed a solid green LED). I checked the instructions to see what the green blinking LED signified, then pressed and held the link button - and then the LED turned solid green - followed by the oh-sweet sound of the remaining three tones. My throttle had armed!!! I pushed the throttle stick up and the motor came to life (prop was removed).
So happy - but still perplexed as to why the one Rx would work and the other would not. The only thing that really stands out in the Futaba 10CAP manual
is the following quote (page 20):
Product Advisory — R6014FS Receiver
Whereas many previous receivers offered a signal output of 3.0 Volts, the latest generation of ICs has been designed to operate at lower voltages in order to increase their operational speeds. The R6014FS receiver utilizes such an IC and, as such, the nominal signal output voltage of the R6014FS receiver is 2.7 Volts.
While this variance in the output voltage will not affect most equipment in use today, it has been brought to our attention that some manufacturers’ products are not capable of operation with the lower signal voltage. That is, they will not operate below 3.0 Volts. Some examples of what we have had reported thus far include sequencers, cut-off valves, older servo designs and some recent non-Futaba digital servos.
Some battery backup devices might have difficulty with the lower operational voltages as well, although they might not appear to initially. One such device functions perfectly on the ground and during a range check, yet when the operational temperature reaches 50°C (122°F), the device actually requires 2.8 Volts in order to function properly. As such, the servos will cease to operate properly.
Many manufacturers are updating or refining their products to ensure compatibility with the lower operational voltages. If you have any questions about the operation of such peripheral items we strongly suggest that you contact the manufacturer directly.
If you have already purchased items which can not operate below 3.0 Volts, we suggest that you either replace the item with an updated version or utilize a device to increase the voltage accordingly. There are a number of readily available devices that may be used to increase the voltage such as ElectroDynamics’ Buffer-Amplified Interface, Duralite's Powerbox (manufactured within the last six months), EMcotec's DSPI products, Smart-Fly’s Power Expander and Powersystem, etc.
Now, I am no expert, but perhaps somebody who knows more than I can take a look at the RP ESC documentation
and let me know if I am on the right track, here.