Please help!! mcpx take off!

[barryorbik]

Not sure if tghis is relevant but in the setting up instructions there are different binding methods for the MCP-x when used with computer and non computer transmitters, so it might be worth trying a rebinding it again as a none computer tx.

Barry

[paulsouthport]

Take vid, side on to the heli with one blade pointed directly at the camera. Slowly move the left stick all the way up, then all the way down, with throttle hold on

[ragged411]

Hi yup done the binding for non computer radios but your right was a good one to check. Paul I will have to do the bid tomorrow for you but I will post it up so please check back. Just brought a dx6i off here aswel tonight so I mite have better luck with that once its here.

[parksy]

Moving the servo cogs won't matter, when you plug new battery in it will realign them automatically. Spinning blades the wrong way by hand will not make a difference, the jolting is just the magnets in motor, they are surprisingly strong for such a small motor. Servos should be ok after only a month depending on flight time. Blades are spinning clockwise right? No movement in main shaft (updown) I'll scratch me head and see if I can come up with something, hopefully it's not a spazzy main board. If it is it's trip to the shop for replacement.
Lets start at the beginning, @P1 you changed feathering shaft, have you put it all together right, take off ball links, do blades/ blade holders move freely?
@P7 you say about blade pitch not being right in idle up? What are you pitch settings for idle up?
also P7 Did you level swash with linear p and t curves from 0 to 100 with mid stick? With throttle hold on, do you get positive pitch above mid stick? Your swash may be level but too low.
also @P7 you say you changed tail boom, how far have pushed tail into frame? It may be jamming elevator servo if too far in.
@P11 not sure about that one?? how far out is it? If it drops down level and goes up level it must be jamming on shaft, take off ball links and make sure swash moves freely on shaft.
@P15 hopping and tilting on floor probably happening because of vibrations from downforce of blades and heli jiggling about on floor.
also @15 yeah you can only change swash pitch using servo rods ie screwing ball links up or down. If the two blades are not same pitch, they may be twisted or something is up with feathering shaft or holders. Get the swash sorted then check blades.

[owend]

"...when i increase the stick upwards it pushes down harder and harder until i reach full stick..." sounds as though the pitch curve runs from say 50% at startup to 20% or even 0% by the midpoint of the stick, then goes back over 50% as the stick goes up fully if you say it takes off, even erratically. I don't know the DX4e - can you set pitch curves? If so, try 0-25-50-75-100, it sounds as though it could be 50-25-50-75-100 or something similar? (or maybe not, I'm still learning too!)

Owen

Crossed with parksy, saying something similar about checking pitch curve!

[ragged411]

Blades spin clockwise, there is no movement in main shaft. one problem i did come across was when changing the feathering shaft i changed to a hardend one that was the same as my stock one but silver with cross head both ends it didnt seem to sit in as far as the one before so it touched the blades so i trimmed a bit off the inside of both blades so they were able to fold inwards as they done before. do have a computer controller so i cant tell you my pitch and throttle curves sorry. i have tried moving up the swash on the main shaft so it can reach higher up but didnt seem to change anything as it does produce alot of negative pitch if i turned it upside down and let go it would shoot straight up in the air no problem. i will check the tail boom to see how far its pushed in that could cause something! the swash can move freely up the shaft when unplugged. thanks for your help!

[parksy]

Just looked at dx4e manual online, there doesn't seem like you can get much wrong there. You haven't knocked hi/lo switch, which would cut servo movement to 70% have you? Though it should still move 70% both ways.
Has it flown properly at all since you got it?
The new feathering shaft doesn't sound right, I'd get the proper one in there.
I think it needs to be looked at by someone with a newer transmitter or Horizon. I'd love to get my hands on it to sort it out, but it will cost the same to send it to Horizon.
Without trying it on another transmitter it's hard to say if it's the heli or the dx4 that's playing up.
Do you have a standard main shaft?
Is heli standard out the box condition, apart from tail boom.
When you plug in and it binds, go to mid stick ( in throttle hold), are servos central? Does swash look central between frame and head?
Have you changed main shaft? If so how long is it and what are the measurements from top to first hole down (holds head in place) and the middle hole (holds collar in place) and how long is the flat spot at the bottom?
I can't think of anything else at the moment. Let us know how you get on.

[ragged411]

Hi thanks for helping, the main shaft is standard, it flew fine for a month worked perfect I had expo and the hi lo switch on so it was easier to fly an all was good until I broke skids and bent feathering shaft, changed skids feathering shaft n boom and not worked since. Swash and servos all fine sitting as they should. Got a dx6i on the way should be here tomorrow so I can find some settings and try it with them in case it is the dx4e. Going to get a new standard feathering shaft aswel to put on it. Thanks

[parksy]

Properly strange, skids bust pretty easy and it doesn't take alot to bend the feathering shaft. Did you relevel swash in lo setting? Maybe this has dropped the swash down further. Try releveling in hi setting with everthing at default setting.
If it flew nicely before, the dx should be ok, just go over all your switches if you haven't already. It seems like everything mechanically is sound, so I wonder if something has gone on the board.

[ragged411]

Right! So I fixed it!! Just not to sure if this is me being a total noob, idiot, shuda stuck with paper planes kinda thing or if its a genuine never thought it would cause that kinda thing. Hopein its the second so I haven't wasted all your time!

Blade holders were put on upside down and then somehow (I'm blaming the dog!) Moved past each other in the centre and attached to the ball link so they looked as if they were up the right way with the writing on the underneath! Don't know what made me think this could have happened but everyone getting me to check this an check that made me go to take the feathering shaft out and wonder.
Err... Thanks I still wouldn't have fixed it without everyone's help!
Happy flying!

[parksy]

Ooops we've all made silly mistakes ragged, no harm done, just glad it's sorted, it's been bugging me all day haha, at least we all know the first thing to check if we get same prob.

[ragged411]

Thank you for your help!!

[Chris200]

righto, go into your reversing menu on your radio. If Spektrum (which im assuming) Channel 6 or collective pitch should be reversed.

So it sounds like you have it in normal at the minute. But basically that channel needs to be the opposite of what it is now.

And if you need the manual its here

http://www.bladehelis.com/ProdInfo/F...-Manual_EN.pdf

As a newbie I can't gaurantee to be right or if my info is relevant in this case but in my case following the setup for the dx6i for my mcpx results in a nice leaf sucker that will actually lift off slightly if the throttle is chopped rapidly ,In other words the pitch reverse in the manual is incorrect and should infact be normal

I'm not sure if the pitch is reversible on th dx4i but it is well worth looking at

[barryorbik]

Well done Ragged411 thats one you won't forget in a hurry!! Have fun flying it now and enjoy playing with the programming in your DX6i

Barry

[JC Roadrunner]

Hi, I might have the answer as I had this issue with one of mine a while ago. If your using a dx4e then your mcpx needs to know its a none digital tx. You need to re bind it, but just before you let the bind swith go you also need to pull the rudder stick left I believe. If that doesnt work try right. It just tells the main board on the heli, its not a digital tx. And should solve your negative pitch issue. Hope that helps buddy