Robert Putley 1 Posted April 19, 2019 Share Posted April 19, 2019 Hi, I have a new small scale electric areobatic model. All set up and ready to fly about a month ago. Thursday, took it down to the patch to maiden. Switched everything on. Cheched ailerons, next thing full port rudder, and ele moving around. Unoluged te Lipo., reattchedthe lipo, and again, same responce. Put that model aside and flew another. Back home, same thing again. Tried another rx, no good. Same with a third. So, next thing, wrote out a second model on the Tranny. Same response.t resort. tried another tx. same problem. Left it alone to try the following day. Same thing, as expected. Then I disconnected the two aileron servos. Normal service resumed. Next, I connected two..different brand...servos to the aileron leads....NO problem. The servos were unused,Tower Pro, which I thing I bought from Bangood. What i do not understand is how when operating the aileron stick, is how these poor servos can affect the other controls. Anone have any ideas. Quote Link to comment Share on other sites More sharing options...
Former Member Posted April 19, 2019 Share Posted April 19, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted April 19, 2019 Share Posted April 19, 2019 Have had one or two of the less costly lightweight servos do this Robert Where the default setting was full deflection stalled, at the plugging in stage Not worth messing with If the servos work initially, this usually continues for their lifetime Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted April 19, 2019 Share Posted April 19, 2019 They must make millions of these so a few dodgy one must creep in from time to time . As Denis says If they work from new, then they will usually last their lifetime without trouble You did test them before installation didn't you ? Possibly the heavier current drian from the duff servo will affect the other servos ? Quote Link to comment Share on other sites More sharing options...
Former Member Posted April 19, 2019 Share Posted April 19, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted April 19, 2019 Share Posted April 19, 2019 Sometimes i found that the extension leads had caused problems with the servos, especially in the ailerons. Plugged them in, and both or one weren't working, or working weird, such as move the stick, the servo moves, then overshoots and flaps around central before stopping. Obviously, you can't fly that! Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted April 19, 2019 Share Posted April 19, 2019 Robert A 'bad' servo may be drawing quite a few amps. This can cause the voltage to the rx to drop which may cause all the other servos to do strange things. 1. How many servos are you using? 2. What is the amps rating of the ESC BEC? if you are using one.. Quote Link to comment Share on other sites More sharing options...
Former Member Posted April 19, 2019 Share Posted April 19, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
gangster Posted April 20, 2019 Share Posted April 20, 2019 I don’t know if it is true but I have heard there are clones of tower pro servos about. I have had problems with one. In use for a couple of years no issues. Then one flying session no elevator on pre flight checks. Ele servo was so hot lower case was melted. Not sure if it was real or clone Quote Link to comment Share on other sites More sharing options...
Former Member Posted April 20, 2019 Share Posted April 20, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Robert Putley 1 Posted April 20, 2019 Author Share Posted April 20, 2019 Thank you for all your help. Firstly, I hard solder all my extension leads myself using heavy duty servo wire. Also the leads are not that long. Second, the radio is 2.4 Spektrum, six years of faultless service. Thirdly the esc rating is only 2.0 amps. I checked the Individual servos which for a 13gram unit have a very high current draw of 400 mah rising to nearly an amp. It would appear as suggested this was causing the problem. So now I know the way forward, and thank you all for you input. Quote Link to comment Share on other sites More sharing options...
Robert Putley 1 Posted April 20, 2019 Author Share Posted April 20, 2019 I also purchased my 5 Tower Pro servos from Bangood, I would say around one year ago. Most of these stuff is rubbish so I now longer use them Quote Link to comment Share on other sites More sharing options...
Former Member Posted April 21, 2019 Share Posted April 21, 2019 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted April 21, 2019 Share Posted April 21, 2019 Not read all of this but I had a similar problem. Turned out to be the JR 591`s which will only work on 4.8V affecting the others. I was using 6V. I now use quite a few Corona servos on 6.6V LiFe packs with no problems. Quote Link to comment Share on other sites More sharing options...
Robert Putley 1 Posted April 21, 2019 Author Share Posted April 21, 2019 Doc Martin, that scenario sounds quite feasible. Friday, I ordered four new servos, different brand, different outlet. Thanks to everybody for the feedback. Quote Link to comment Share on other sites More sharing options...
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