AR6037T Rx Throttle Not Registering

[Capt Kremen]

A 6Ch Spektrum AR6610T receiver, (Input socket pin order Spektrum traditional TAER), binds successfully in most respects to a Spektrum NX10 Tx i.e. all control surfaces function normally.

However the Throttle/ESC  when inserted into the receiver at the Rx Socket 1 position, does not operate.

Before the ex-spurts chime in, Rx fully updated to the latest software, Channel operating over its full range +/- 100 as seen on Tx 'Monitor' screen.

Attaching a servo to Socket 1 in place of the ESC and that operates perfectly over its entire range left and right.

'Throttle Cut' was set; the screen depicts the throttle lock on and then movement through full range when 'Throttle Cut' released.

'Throttle Cut' inhibited/deleted, no change, no ESC on socket 1 of the Rx.

Swapped out the ESC and tried a different ESC brand, still nothing in Socket 1 for an ESC.

(Both ESC work normally across their range when tested on a Watt Meter).

However, re assigning the same ESC to a vacant Socket 6 on the Rx and that same ESC 'chirps' into life and works perfectly.

What 'hidden' setting on Rx Socket 1 needs adjusting for a ESC to work when a servo works perfectly when inserted into it? 

(Have changed and extended the ESC travel above normal 100 too, still the ESC will not operate on socket 1).

Puzzled🤔

Edited June 5, 2024 by Capt Kremen

[Kim Taylor]

What is your low value set to?

If the esc thinks it's not at zero, maybe it won't arm.

Kim 

Eta some esc's need a value in excess of-100 to arm

Edited June 5, 2024 by Kim Taylor

[Frank Skilbeck]

You've not got a throttle cut active maybe?

[Colin Carpenter]

Trim fully down perhaps??

[Capt Kremen]

I had already set and tried operating with the range greater and/or less than + & -100 whilst ESC plugged into Socket 1, just to entice the ESC to operate which it does, but only when plugged into Socket 6 of the Rx, when there is no requirement for any operating range change above or below +100/-100.

'Throttle Cut' was tried AND withdrawn/inhibited just as a further check to eliminate that from the set-up i.e. there is no throttle cut set on.

Trim also run to both extremes, no result in Socket 1 and using Left Throttle Stick up and down (Mode 2).

As mentioned. a conventional servo operates perfectly when placed in Socket 1 so signal output is being made in that socket.

No ESC 'chirrup' or any 'tone' emitted either in 'Socket 1', which it does as soon as plugged into 'Socket 6' in the Rx.

[Frank Skilbeck]

So the throttle channel is actually working fine, but for some reason the ESC won't arm. There's no secret setting for the ESC it just needs the same position signal as a regular servo to work, which it does on channel 6 so the ESC is fine also. Which suggests it must be in the Tx set up, the throttle channel isn't reversed by any chance?

 

[Capt Kremen]

No Frank, throttle not reversed - tried that among the first things I thought of.

Summary: Socket 1 Servo works full range left & right but ESC doesn't or even 'beep, beep' like when out-of-range / Socket 6 - ESC and any Servo plugged into it work.

[Denis Watkins]

Spektrum DX stick CALIBRATION on YouTube

 

Check again the moving cursor on MONITOR is actually in the middle on middle stick

[Capt Kremen]

Using a different Spektrum Transmitter (DX6 Gen3), created a fresh new model but bound it to the original, problematic Rx.

Situation remains: Socket/Ch 1 = No ESC response whilst if the ESC is inserted into a reassigned to Throttle Socket/Ch6, it functions normally.

Other aircraft models on both Spektrum Tx but using different Spektrum Receivers, function normally i.e. TAER socket/Ch order.

 

[RottenRow]

That is exactly what I would have tried as well, eliminating the transmitter setup from the equation.

 

Reading the manual for your receiver, it makes mention of the channel 1 (throttle) port being a ‘smart throttle’ port, which if connected to a suitable Spektrum ESC received data back from the ESC for telemetry purposes.

 

I’m assuming your ESC isn’t one of these Spektrum types?

 

That being the case, it could be that port 1 is somehow getting locked into the wrong state at power up, and isn’t outputting any pulses to the ESC.

 

As ch1 works with a normal servo connected, perhaps you could try Y-leading a servo and the ESC together into port 1 and see what happens (just to prove a point). Perhaps try both methods of powering the RX (via the ESC and using a battery, but not both at the same time).

 

Brian.

[Capt Kremen]

I may have discovered a possible cause ...

As mentioned in my first post, I had ensured the latest software update had been installed onto this Spektrum receiver.

(I use the Spektrum USB updater cable which plugs into the 'prog' programming socket on the Rx.)

Wondering whether the latest update had actually downloaded perfectly, I rolled back to the previous versions availble.

I did this several times back and forth, as will become apparent.

 

Reading the release notes from Spektrum regarding the changes made in these updates, I read the following, quote in italics with my bold highlight and underline:

 

Version 2.39.0 (September 7, 2021)

----------------------------------

- Fix rare intermittent issue on powerup in which output CH1 or CH5 would not send PWM pulses until power cycle or hold occurred (thanks funkyfreestyler)

- Improve compatibility when used with multiple devices on multiple SRXL2 ports.

- Add a Frame Rate menu, allowing users to customize Servo frame rate output settings.

 

In my case, rolling back or forth to update the Rx to the latest software version has still not resolved the issue.

 

Personally, I use other makes of Tx & Rx but require use and modest understanding of Spektrum as many of my student pilots I instruct operate Spektrum equipment.

With their low time experience of Tx & Rx operation would they have even got this far I wonder(?) Return the Rx to Horizon perhaps (?) receipt long gone and the cost ... resigned to 'I learnt about Spektrum from this' ... not knocking, when it works as stated, it works 🤨 Still wish it worked TAER as all the other Spek Rx do ☹️

[Chris Walby]

If it was me I would contact John Norris of Logic RC (Spektrum UK approved service agent) and ask for his advice. If it needs to be returned to him for a firmware version that works or he should be able to tell you when the bug will be fixed with a new firmware patch.

 

Like any manufacturer Spektrum should resolve the known issue or as a good will gesture replace it with something that does work.