CX2 tail keeps rotaing clock wise

[merlin703]

I have changed the settings on the 4-1 speed controller but that doesn't make any difference. It appears that the upper blades are moving at a faster rate than the lower blades but I'm not that familiar with the CX2 to troubleshoot. Any ideas how I can fix this problem? Also, what are the function of the two adjustable options on the 4-1 speed controller. 1 is for the gain and the other says "proportional". I've been moving both randomly to see the changes but not major changes except that it spins clock wise even faster. :arggg:

[stsrus]

Do you have the aluminum upper rotor head on your inner shaft? I have had the set screw come loose which makes it slip and changes your porportional speed between the two rotors. You might check the screws on the gear on the bottom of the inner shaft also.

[Montana_Reefer]

I have changed the settings on the 4-1 speed controller but that doesn't make any difference. It appears that the upper blades are moving at a faster rate than the lower blades but I'm not that familiar with the CX2 to troubleshoot. Any ideas how I can fix this problem? Also, what are the function of the two adjustable options on the 4-1 speed controller. 1 is for the gain and the other says "proportional". I've been moving both randomly to see the changes but not major changes except that it spins clock wise even faster. :arggg:

The gain is for the built in gyro, the proportional mixing pot is the one that you want to adjust for this, it controls how fast the motors turn to each other.

[merlin703]

STS and Montana, thanks. I will try this as soon as I get back home. I hope the problem is just a proportional setting issue. It might as well be just that.

[Montana_Reefer]

Rember to re-initialize after you make adjustments.

[merlin703]

OK, I tried both and didn't work. I'm starting to think that this is a motor or speed controller. I have messed up with the proportional mixing on and off from extreme to extreme and seen no change at all. The I messed with both (gyro and proportional mixing) and nothing then all of a sudden, you can see a change. Then on its own goes back to the tail roting clockwise. Any other ideas, is this a clear sign of bad speed controller?

[Flyemhigh]

Remember to adjust the proportional in very small increments(almost to the point you can't tell you moved it).

[Montana_Reefer]

All your trims are in the center right? Put both proportinal and gain to the half way points and slowly change them, always re-initialzing them after you change the settings. If that dosen't work I'm stumped for now!

[merlin703]

OK, thanks for trying. I wasn't re-initializing each time I made changes so after readying your message, i did. Nothing really changed. When/if it changes, it goes back to what it was doing. I really think it's something else at this point.
Yes, there is no trimming. Man, my 500 is 10 times easier to troubleshoot than this CX2 :arggg:
I guess I will just fly it like that. It's not unflyable, you just have to keep constant tail movement counterclock wise.

Thanks again for giving it a shot!

[carlo_the_wonder_frog]

You should be able to get it to be stable just using the proportional pot, remember you have to unplug the heli every time before you make an adjustment an only turn that little pot just a little each time, a little turn does alot to the heli.

My suggestion: Unplug heli, turn both gain and proportional to mid way position, adjust proportional a little each time until it holds. As your battery gets weaker the tail will start to drift, so try to do all initial setup on a nice new charged battery.

[merlin703]

I tried all those things... and nothing. The tail doesn't turn as quickly as it was turning earlier so I will have to leave it like that. The fact that even when I make drastic turns on the proportional settings, I don't see don't see a difference. In the past, it was also doing the same thing on and off. At this point, I believe I have a bad 4-1. My newer CX2 flies perfectly fine but this other one is giving me a headache. I guess I can buy a new 4-1 or 3-1 with a receiver and replace it. This CX2 was purchased from ebay.

[benzee1]

It sure sounds like the 4n1 unit. You can call Horizon Hobby (name, addy, # on back of E-Flight manual) 877-504-0233 and they will verify if it's the 4n1.

[misterg74]

I tried all those things... and nothing. The tail doesn't turn as quickly as it was turning earlier so I will have to leave it like that. The fact that even when I make drastic turns on the proportional settings, I don't see don't see a difference. In the past, it was also doing the same thing on and off. At this point, I believe I have a bad 4-1. My newer CX2 flies perfectly fine but this other one is giving me a headache. I guess I can buy a new 4-1 or 3-1 with a receiver and replace it. This CX2 was purchased from ebay.
So did you figure it out yet cause i am having EXACTLY the same problem with the cx2 i just bought off E-bay?............ Hmmmmmm????? Mine also has the 4 in1 in it. With mine it appears that someone replaced one of the motors could that be culprit?

[l4m3r]

ok i have this exact same 'problem. i can get my cx2 dialed in perfect, no tail drift at all and slowly as i fly the tail begins to drift off to the left, so the nose is going right. even if i use a newly charged battery. never fails. i can adjust the gyro till it is perfect then this always happens. i am beggining to think this is something inherent in these little guys. it just slowly gets worse as i fly, i have 4 battery packs and after 3 of them the tail drift is pretty severe so back to adjusting the gyro. on this forum and others i see people with this same problem, i think it is something in the design or how the rotors spin together that makes this happen, i have just decided to live with it and become a great gyro adjuster ;/

best way to get it adjusted that i have found is to set the gyro as close as you can to its mid point. turn on the heli and slowly power up, what you want is for both motors to start spinning the blades at the same time. if you get them to do this usually your tail drift is none to very minimal. then as you fly you will see the drift slowly creep in, and i bet your tail will be drifting to the left.

if anyone has found a way to stop this please post it. i will try anything at this point lol.

good flying and have fun!

[jrohland]

This is often caused by having one weak motor. You might try replacing one or both motors. Trouble is, the quality control on the original motors is not that great. I replaced mine with the SE 180 (http://www.pimp-my-helicopter.com/store/xtreme-se180-bearing-motor-esky-coaxials-blade-id-49.html) motors. I have not flown it much since that change but, it does appear to be more stable in the rudder.

jrohland