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    #16
    I see that you used cable tie on the gyro. That's not good. It will transmit vibration to the gyro and screw it up. Just use gyro foam tape only.
    And you can put all on one location.
    And like Sirod said, take note of the axis orientation and the direction switch (reverse or normal).

    Comment


      #17
      hi!

      i just tested again. the gyros orientations are correct. i used my futaba 7C tx and set the gyro gain to 3 different gains, 35, 50 and 75. I set them to normal mode. the delay was set to 0 and the limit was set to max. i turned the gyros to the DS mode (digital servo mode) as well.

      the escs can work when the gain is 35%. but the flight itself isn't stable. the gyros doesn't seem to be controlling the stability. the left motor still exhibits higher rpm.

      when the gain is 50 and 75, the escs don't work with one another at all. 2 of the 3 do not start up when the TX is on. i tried re-calibrating the 3 escs, i.e. power up throttle to max when i switch on TX and the escs, then wait for 10 secs before hearing the beep beep sound and power down throttle all the way. doesn't seem to work.


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        #18
        Be very careful that your three motor channels are not reversed. I cut my finger because of that.

        Seems like 35% is your rate mode, and you need to use analog mode, not digital mode. And 35% seems a little high. Try reducing the gain to 5-10%.

        Comment


          #19
          One helpful tip is to use the "monitor" function in your TX to see what is the channel output.

          Comment


            #20
            Seems like 35% is your rate mode, and you need to use analog mode, not digital mode. And 35% seems a little high. Try reducing the gain to 5-10%.

            If you choose microcontroller based stabilization, you can adjust gyro gain 50% and upwards, which is a more stable platform than using the purely gyro as a stablization control.

            No Mixing in Tx required, just a 120 ccpm for Tri, and 90 for Quad copter, all required mixing is done by firmware inside the microcontroller board.

            Check these out :http://www.daddyhobby.com/forum/showthread.php?t=55784

            Tricopter and Hexcopter are next in the line....

            Cheers.

            Comment


              #21
              Originally posted by silver View Post
              If you choose microcontroller based stabilization, you can adjust gyro gain 50% and upwards, which is a more stable platform than using the purely gyro as a stablization control.

              No Mixing in Tx required, just a 120 ccpm for Tri, and 90 for Quad copter, all required mixing is done by firmware inside the microcontroller board.

              Check these out :http://www.daddyhobby.com/forum/showthread.php?t=55784

              Tricopter and Hexcopter are next in the line....

              Cheers.
              Microcontroller solution is more elegant, but is much more expensive than just 4 dumb gyros. Big bucks which I dun have.
              That's why a quad cost at least 1K.

              Comment


                #22
                Good news !

                Prices for Multicopter has fallen, once prototype is done, production model should not exceed $500 or even less...depending on features.

                Watch out for RTF model... just put in your receiver and Lipo batt, and go flying.... This is only a hobby, nobody should pay a commerical price tag for it !

                Low priced simple RTF model coming your way...

                Comment


                  #23
                  Originally posted by silver View Post
                  Good news !

                  Prices for Multicopter has fallen, once prototype is done, production model should not exceed $500 or even less...depending on features.

                  Watch out for RTF model... just put in your receiver and Lipo batt, and go flying.... This is only a hobby, nobody should pay a commerical price tag for it !

                  Low priced simple RTF model coming your way...
                  Wow, designed by yourself?
                  Then you'll be earning big bucks soon.

                  Comment


                    #24
                    One question I would like to know... how do u differentiate which side is front, side and rear during flight?

                    EDIT: During flight like flying forward and maybe do a figure 8

                    SH

                    Comment


                      #25
                      Coloured foam was used for the prototype model, eventually the front forward legs will be in bright RED or Yellow in colour.

                      Individual owner may use their own creativity to dress up their own machine...for example using LED strips or a canopy etc....easily customisable.

                      Comment


                        #26
                        Show some teasers leh...

                        Comment


                          #27
                          hi SH,

                          for me, my back motor that is supposed to control the forward motion is connected to the yawing mechanism. so, in the way, i try to look out for the servo to know the directions. A very confusing way, i know... probably using colours to distinguish the sides will be better

                          beanlee999

                          Comment


                            #28
                            Originally posted by etman View Post
                            Show some teasers leh...
                            you saw it... I have it....look out my Quad thread... haha..

                            Yes as silver said, why paid full commercial price for the advertisement???

                            .... basically this one I have will be under $500 RTF or you call it Receiver ready. I am considering getting more unit once all the parts are in.

                            Stay tune to my Quad Journey thread...

                            oops! sorry to go a little off topics!! too excited after I start this Journey...

                            Comment


                              #29
                              Hi DT8666,

                              Oh I see. Look forward to your R&D efforts.

                              Which ESC you are using? If I'm not wrong, the mikrokopter uses specialised ESC with more refined control steps and faster responses.

                              Comment


                                #30
                                I was doing some quick checking to see what I need in order to create a tricopter or quadcopter... the main cost I see is that, we required 3/4 motors and 3/4 ESC.

                                Does anyone of you tried using variable pitch instead?
                                I mean, I was thinking of using TRex450 (or any 450 size heli)'s tail rotor system but using main blades instead. Then all the 3/4 rotor is driven by a single motor instead. In that way, we can reduced the motor and ESC to only 1.
                                To stabilize/control, we adjust the pitch of the blades.

                                Take example, using TRex450 tail casing and tail blade grips. Blades using TRex250. To adjust pitch, we adjust it just like adjusting tail pitch. In this configuration, we required 3/4 servos instead.

                                EDIT: BTW, IMHO adjusting/controlling pitch is faster than adjusting motor speed.

                                SH

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