Announcement

Collapse
No announcement yet.

Very weird problem!!

Collapse
X
Collapse
 
  • Page of 3
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • #1

    Very weird problem!!

    The same servo (aileron) keeps going dicky! On the 3rd set of servos, same problem, now on the second BeastX unit, same problem!!!

    Heli is a 450 Sport V2 with DFC head, using 1 satellite Rx, servos on the right frequency and voltage (YGE ESC BEC on 6v), no binding. The servos are KST DS115MG's (same as MKS DS95).

    On all 4 occasions the aileron servo will move very fast up and down by itself or totally loose its centre (but always moves down to roughly the same position!), it will stay in this downward position and will respond to stick input but will bounce around when giving a fast input and suddenly stopping.

    Im convinced its down to the satellite reception but would this cause only one perticular servo to behave irratically???

    I don't know what to do next!
    Last edited by Richardmid1; 17-12-2012, 04:16 PM.
    Tags: None
  • #2
    Do you have a solid light on your satelite after this happens? maybe send the unit off for a checkover
    Last edited by tonystevens; 17-12-2012, 04:36 PM.
    Avant mostro 700E
    Avant mostro 700 Nitro



    member of :
    South cheshire heliaddicts

    Comment

    • #3
      I would start with servo tester ...
      Trex 450 DFC with AR7200BX and several small E-flite Blades

      proud wearer of one EGS sigpic

      Comment

      • #4
        Wiring maybe? Short somewhere between FBL and servo?
        Tom
        sigpic Synergy E7SE - Kontronic Helijive 120+ ESC, vBar Neo
        SAB Goblin 630 Competition         - Castle Edge 120HV, vBar Neo
        Blade 700X - Castle Edge 160HV ESC, Mini vBar
        Logo 550SXv2 - Castle 130LV ESC, vBar Neo
        .... and a Gaui X3
        Spektrum DX8 ; Mikado VBC ; RealFlight 7 & neXt sims         ... and two EGS'



        Comment

        • #5
          Tony, do you mean send the satellite off for testing or the beastx?

          Comment

          • #6
            My money is on the Rx
            sigpic


            Rave ENV Nitro
            New Logo 550
            Synergy N5c
            TSA 700E night flier
            I use VBar control because it's feckin awesome I use NEO rescue when I remember to
            5 x EGS thingys and a Platinum star doo dah

            Comment

            • #7
              Very weird problem!!

              Just remembered one thing - is the sattelite DSM2 or DSMX? And is your DX8 set to DSM2 or DSMX? Also, is your receiver a AR7200BX? I seem to recall a warning that "strange thing" will happen if you have a mismatch somewhere between sattelite<>rx<>tx. Don't remember any details now but it was implied that AR7200BX only supports DSMX satteliites.
              Trex 450 DFC with AR7200BX and several small E-flite Blades

              proud wearer of one EGS sigpic

              Comment

              • #8
                Originally posted by Richardmid1 View Post
                Tony, do you mean send the satellite off for testing or the beastx?
                Both ideally, is this a spektrum beast x and is your satelite blinking after this happens?

                try without the satelite, if its a spektrum BX you dont need it anyway
                Last edited by tonystevens; 17-12-2012, 07:16 PM.
                Avant mostro 700E
                Avant mostro 700 Nitro



                member of :
                South cheshire heliaddicts

                Comment

                • #9
                  Definitely sounds like a suspect Rx/sat, or patch cable to me.
                  Harry

                  Mikado Logo 700 | VBar Neo | JR HV Servos | Pyro 750-50L | Kontronik Kosmik 160HV + buffer pack|
                  Thunder Tiger G4 E720 | CGY760 FBL | BLS272SV + BLS276SV | Align 800MX Dom 440kv | Kontronik PowerJive 120HV + Opti UltraGuard |
                  SAB Kraken 580 6S | Spirit FBL | BLS173SV + BLS276SV | HK4025 1100kV | Kontronik Kolibri 140LV + Opti UltraGuard |


                  And a pillow for the doghouse...

                  Powered by Futaba 18SZ

                  Comment

                  • #10
                    Its a standard beastx with a separate dsm2 satellite bound to a dx7. Hmm so maybe it's a faulty satellite sending weird signals to that one channel?

                    No blinking light when it goes weird.

                    Bronek, I have had binding problems in the past with binding using my dx7 but with a dsmx rx, it worked but not with a beastx as it took so long to bind the beastx would initialise before getting a signal sending the servos all out of whack!
                    Last edited by Richardmid1; 17-12-2012, 09:10 PM.

                    Comment

                    • #11
                      I'd start by finding out if all 4 servos have a common fault. Digital servos can produce very high currents and can damage commutators. This shows up as a sticky motor. The motor is open circuit in one position and ok in all others. If this is the case then we need to look for the cause. It could be the size of the mounting hole, the position of the servo or the load presented by the head. Reducing the bec to 5V may cure the problem. Or you can use the MKS individual voltage regulators which will reduce the max current available to each servo.

                      We are R/C hobby expert makes in Taiwan

                      Have these servos failed during use or after a crash? The other thing to do is to monitor the current and temperature of all servos while the servos are running. You may also need to measure the forces or the currents involved while flying. The current can be measured with telemetry.
                      Flasher 450 Sport. Assan GA250 with 520 tail servo, MKS DS450 cyclic.
                      Multiplex Cockpit Tx, DX7, DX6i
                      Blade 130-X, MSR, MSRX
                      Phoenix Sim

                      Comment

                      • #12
                        Is this your only heli? If it is then I;d start by checking your tx servo ourput screen..it may be a dodgy pot there..see if it glitches on that screen and in phoenix.
                        Afer that i'd look at wiring routes, chafing and cables before blaming rx/beastx/servos
                        PGK
                        450Pro Clone fb, Trex500 fbl beastx, Trex 600N fbl beastx, Trex700N fbl msh brain, Spectra G Hanson 26 3dmax fb, Blitz Avro fb...Futaba 8FG

                        Comment

                        • #13
                          No not my only heli, I have 4 others plus Phoenix sim which are all fine. Its the only heli I have that uses just a Satellite Rx though. I have changed the Satellite and rebound it to my DX7. Only thing to do now is to fork out for yet another servo and test it over and over again on the bench then gingerly put her back in the air!

                          All I want to know is is it actually possible that a faulty Satellite Rx connected to the BeastX could be sending weird signals to a perticular channel on the BeastX causing the servo to burn out? (I have no idea how it all works!)

                          Comment

                          • #14
                            There is a new level of firmware for the BeastX (3.0.12) which may fix this problem. If you have a search on Helifreak there is a guy on there saying he has a development version of firmware (3.0.11 from memory) that has a fix for a problem that sounds the same as yours.

                            Comment

                            • #15
                              Cheers for that Steve but I think that's only to stop the servos going to the extremes before the beastx initialises. I guess there is a chance the 2 could be related?

                              Comment

                              Previous 1 2 3 template Next
                              Working...
                              X