Strange beeping when plugging in...

I don't understand electrics. a coupla questions. Just binding my DX7 to my Lemon Rx. in my Scout, successfully, but the thing just keeps beeping randomly and the prop jerks when it beeps. It was a regular beep until I finished binding and then it beeped more randomly, always with a jerk from the prop. I tried the trim, but that made no difference. Can anyone explain what's happening? All control surfaces move well.

Can we not find a suitable switch that carries the current instead of all this damned awkward plugging and unplugging connectors.

Thanks,
Martin

I sort of thought ( guessed!) the same thing klippy. maybe the esc needs reprogramming ?

I am going to take a stab at this. As Eric pointed out you need to establish what is beeping. If this is the first time you have powered up, from what you describe it sounds like the ESC is in program mode. This is normally the case with a new ESC, the first thing it needs to know is throttle travel. If you have a manual for the model or any paperwork for the ESC, this should tell you how to program it. If not then look up the make & model online & find the programming instructions, this should include a fail safe that cuts the throttle on loss of signal. As Klippy says NEVER attempt to do this with the prop on ! I have the scars to show what can happen. Don't forget to also set a throttle cut on the transmitter.

With a Spektum transmitter the throttle is set the conventional way, unlike Futaba, so it should not need reversing. All my Lemon ESCs have worked normally on both my DX6i.
My guess is the ESC is either trying to tell you that the throttle channel is not receiving the appropriate signal (ESC plugged into the wrong channel) or more likely the throttle is not closed FULLY and that can means that the throttle trim has to be set to full low as well.
As a safety feature the ESC will only arm the throttle, and go through the cell count beeps, when the Tx is sending the lowest possible throttle signal.
As far as I am aware only the motor can make a beep noise. No Rx or ESC has any form of 'sounder' and most ESCs now have 'auto throttle range' as well.

not quite correct Simon, most of the buggy esc's have a sound module and I thought I've heard some up the field making beeps etc when the leccy boys plug in??
I'm with crash, think it's in programming mode.

Paul
Again as far as I am aware an ESC cannot remain in program mode as until it has signalled it has accepted a change it is not saved and it reverts to the factory setting - as you will likely find out if you ever try programming an ESC from the Tx using just the throttle and beeps.

Of course if you are sure the throttle is fully closed it is possible the ESC has a fault. The power for the Rx and the servos comes from the completely independent BEC circuit so they will work normally.

All a bit over my head Simon! so I can't argue, all I do know is that in the shop there is a esc programming device ( I don't get involved with that side) and it's used to "map" esc's for high performance buggys much the same way one can alter a ecu in a full size car.
probably best I stick with my smelly diesels

Well all I can say is that I have had Esc's that when I have powered up the motor continually beeps & pulses. On reading the instructions the solution has been ( with the prop off) to 1. Turn on the TX with the throttle at maximum. 2. Connect the battery to the ESC & wait for two beeps, then immediately move the throttle to minimum & wait for one beep to indicate it has the throttle range of the TX. 3. Disconnect the battery for five seconds, then reconnect with the TX on & throttle set to minimum. Seems to do the trick for me.

Think we need special builder to get back to us and give some more details, providing of course he can still type with no fingers!!
(only joking special builder)

Well, thanks, chaps for the many and various offers. In the end, following advice from elsewhere and doing almost exactly what crash just suggested above it worked. The Prop was off, btw. Turned out, like every other bloody control, the throttle was reversed. Eventually I managed to reverse everything so now all the waggly bits waggle correctly and the whizzy bit whizzes the way I want it and is dead on low throttle. I can only assume that means the fail safe is set. Prop back on. All, appears to be well. I even managed to set travel limits to the rudder, but expo on the elevator? Nah. All I can get is 100% or 61% and I can't get dual rates, but by that time I'd stared at the manual online for so long I was nodding off. So, I thought, "time to put it away"
Some progress at least. As to programming ESCs, no way. I have no idea what that's all about and care even less so long as it simply turns the whizzy bit on and to some extent varies its speed...It does, so satisfied.
And the beeps stop after the initial plugging in faff.
Eric...Deans or XT60, pulling connectors apart seems like a damned faff to me when a switch would be better and much more convenient. Are they so unobtainial?

Martin

I think this might help you with setting up your DX7 Martin. It would also be useful to know which Lemon RX you are using ?

Eric,
I found that leaving a battery connected lead to it draining once before, but it's the plug/unplug thing when setting up a model that seems such a chore. Obviously I take the battery out to charge. All my charging is done on the Workmate that lives next to my (brick) shed. But it would be good to set the model up at home and then take it to the field and just switch it on, instead of all the taking out of hatches, stuffing batteries in and re-hatching at the field. Especially as my new club doesn't have any start up tables so everything has to be done on the ground. Takes me ages to get back up on my feet, alas.!

Crash, thanks for that link. I'll give it a look today.

Martin