Carlos Contreras Posted January 21, 2020 Share Posted January 21, 2020 Hi guys... got a second hand DX6i and it seems not function correctly... the throttle doesn achieve 0%, not even if I trim it, and the rotor seems to have power all the time (I disconnect the motor) as you can see on the video... any ideas? is it defective ? I'm doing something wrong? please have a look **LINK** Thanks a lot Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 21, 2020 Share Posted January 21, 2020 I don't use Spektrum Carlos, anyone else got ideas ? Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 21, 2020 Share Posted January 21, 2020 Confirm the travel in the " Monitor " window Carlos Then check the sub trim setting is back to Zero And The Travel adjust setting is 0% to 100% These are 3 separate Windows in the menu Quote Link to comment Share on other sites More sharing options...
Carlos Contreras Posted January 21, 2020 Author Share Posted January 21, 2020 Thanks a lot I will check it tonight !!!!... I was reading about cleaning the potentiometer, some people called it "throttle glitch"... let's see... Really appreciate your response. Quote Link to comment Share on other sites More sharing options...
kc Posted January 21, 2020 Share Posted January 21, 2020 One other possible problem with a 2nd hand set might be that it's set to Mode 1 rather than Mode 2 even thought he rachet seems correct for Mode 2. Swapping mode 1 to 2 also has to be done in the programming menu. So just wiggling the right stick and trim might give a clue .... Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted January 21, 2020 Share Posted January 21, 2020 Just a thought, go into another model memory and set it to Airplane model, set the throttle travel to +/- 100% with the trim down and check the movement on the servo monitor, if the throttle moves over it's full range then the stick is OK and it is something in the Heli programming. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 21, 2020 Share Posted January 21, 2020 Heli mode ? idle up. Quote Link to comment Share on other sites More sharing options...
Carlos Contreras Posted January 25, 2020 Author Share Posted January 25, 2020 Hi guys thanks for the replies... after reading/watching a few videos I decide to clean the potentiometer.. so open the transmitter, the potentiometer (3 metal flaps holders) clean the inside with Isopropanol (looks clean anyway)... put all back and voila !!! its going to 0% and no problem... just tested the heli and all ok in that part. Now... second question... fortunately I test the heli without rotors (safety first). All ok.. back to 0% throttle stop... but I turn the transmitter OFF and the motor started like in full swing !!!... is that "normal"? should I disconnect the heli power first? (sorry if sound a basic question... but my RC car don't do that... Traxxas) Thanks !!! Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 25, 2020 Share Posted January 25, 2020 Carlos. wrt to 2nd question. It sounds like your fail-safe is set up with the throttle at 100% rather than 0%. Have a read up on setting the fail-safe. edit - If using spektrum receivers, it probably just means re-binding with throttle down. Let me guess that you have reversed your throttle servo in your transmitter since you initially bound the model. Edited By Gary Manuel on 25/01/2020 12:18:27 Quote Link to comment Share on other sites More sharing options...
Carlos Contreras Posted January 25, 2020 Author Share Posted January 25, 2020 Cheers Gary !!! I will dig into these days. Thanks a lot. Quote Link to comment Share on other sites More sharing options...
Colin Carpenter Posted January 25, 2020 Share Posted January 25, 2020 Always disconnect Rx/model before turning off tx ! Otherwise ☠️☠️😂😂Colin Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 25, 2020 Share Posted January 25, 2020 Posted by Colin Carpenter on 25/01/2020 12:23:51: Always disconnect Rx/model before turning off tx ! Otherwise ☠️☠️😂😂Colin I disagree. In fact, it's a mandatory safety test at our field - to test that the fail-safe is set right. Obviously hold onto your model whilst doing it - just in case fail-safe is wrong way round! Quote Link to comment Share on other sites More sharing options...
Peter Christy Posted January 25, 2020 Share Posted January 25, 2020 Posted by Gary Manuel on 25/01/2020 12:34:50: Posted by Colin Carpenter on 25/01/2020 12:23:51: Always disconnect Rx/model before turning off tx ! Otherwise ☠️☠️😂😂Colin I disagree. In fact, it's a mandatory safety test at our field - to test that the fail-safe is set right. Obviously hold onto your model whilst doing it - just in case fail-safe is wrong way round! Yeah, but the OP appears to be flying a helicopter! Your club's "safety test" is a recipe for disaster in that scenario!!! -- Pete Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 25, 2020 Share Posted January 25, 2020 Good point Peter. I don't fly helicopters so I'm not sure how faisafe should be set. I'm pretty sure that it should not be set to throttle up with the copter sat on the ground though. Whatever the intended failsafe is, it should always be tested and not just assumed that it will behave as expected. Oh and to clarify my previous post. I meant that I disagreed with the "Otherwise ☠️☠️😂😂" part, not the order that the Tx and Rx should normally be switched on and off. Apologies if what I said was misleading. I do maintain that switching the Tx off (or losing the signal!) with the Rx switched on should result in a safe situation and must be specifically set up and tested. That's what I was getting at. Edited By Gary Manuel on 25/01/2020 13:48:53 Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 25, 2020 Share Posted January 25, 2020 double post Edited By Gary Manuel on 25/01/2020 13:48:16 Quote Link to comment Share on other sites More sharing options...
Carlos Contreras Posted January 26, 2020 Author Share Posted January 26, 2020 Yup Gary... thanks again... it was that... now the fail-safe is set to 0%.... I'm still wondering what would be the safest option for it... ok 100% its a no no... basically its a recipe for disaster.... and a 0% it will depend of how high it is... and my guts says about enough throttle to make it land... BUT... incontrolable with the rotor spinning?... is not safe for anyone... I will prefer a crash with to rotor OFF... what do you think? Quote Link to comment Share on other sites More sharing options...
Colin Carpenter Posted January 26, 2020 Share Posted January 26, 2020 My experience with helicopters is to set zero. When they go they go so less rpm at the head the better ! JMO ! I've only ever seen one fly away back in the 80's ! A Bell 47 MASH flew from our field in Bath to an outskirt village about 3 miles away ! Pre failsafe of course ! I was in the local model shop when a chap came in and asked what a MASH ,Heli was worth ! Owner got it back in a repairable condition ! Colin Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 26, 2020 Share Posted January 26, 2020 Carlos. I don't fly helis but I do fly quads. I set my failsafe on my quads to cut the motors immediately. My thoughts are that a quad falling from the sky can only impact once and it will be directly below where I was flying - which should be over an empty field and therefore safe. Quote Link to comment Share on other sites More sharing options...
kc Posted January 26, 2020 Share Posted January 26, 2020 It's worth reading what the BMFA say about the law regarding failsafes. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted January 26, 2020 Share Posted January 26, 2020 Posted by Gary Manuel on 25/01/2020 12:34:50: Posted by Colin Carpenter on 25/01/2020 12:23:51: Always disconnect Rx/model before turning off tx ! Otherwise ☠️☠️😂😂Colin I disagree. In fact, it's a mandatory safety test at our field - to test that the fail-safe is set right. Obviously hold onto your model whilst doing it - just in case fail-safe is wrong way round! Nope our club doesn't have a mandatory test for helis, you stick to drones n planes. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted January 26, 2020 Share Posted January 26, 2020 Posted by john stones 1 on 26/01/2020 18:50:43: Posted by Gary Manuel on 25/01/2020 12:34:50: Posted by Colin Carpenter on 25/01/2020 12:23:51: Always disconnect Rx/model before turning off tx ! Otherwise ☠️☠️😂😂Colin I disagree. In fact, it's a mandatory safety test at our field - to test that the fail-safe is set right. Obviously hold onto your model whilst doing it - just in case fail-safe is wrong way round! Nope our club doesn't have a mandatory test for helis, you stick to drones n planes. Interesting. I'm a member of the same club as you and I thought the safety test applied to all types of models. Please explain why it doesn't apply to helicopters. Quote Link to comment Share on other sites More sharing options...
Carlos Contreras Posted January 27, 2020 Author Share Posted January 27, 2020 my guts tells me to leave it in 0%.... safer for everybody. Thanks guys for taking the time to reply. Surely I will have more questions as I'm just starting with RC Helis... I will take it easy, slowly... painfully slowly but safe. Thanks again !!! Quote Link to comment Share on other sites More sharing options...
Barryorbik Posted January 27, 2020 Share Posted January 27, 2020 Carlos, As the throttle potentiometer responded to switch cleaner my suggestion would be to dismantle your transmitter again and put a few drops only of 'genuine' 3 in 1 oil into the potentiometer. That will help stop the silvered elements within the potentiometer oxidizing again. Long term a replacement potentiometer/gimbal is the safest option as a helicopter with the blades spinning uncontrollably is not fun!! Definately set the throttle cut to 0 as even a low throttle setting will cause lots of destruction if mother earth intervenes in your flight plans. Barry Quote Link to comment Share on other sites More sharing options...
Carlos Contreras Posted January 27, 2020 Author Share Posted January 27, 2020 Thanks Barry !!! I will add the oil for sure. I also was wondering where to get a new potentiometer for my DX6i ... I looked but not luck... any ideas? link? potentiometer or the whole gimbal. Thanks Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.