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180CFX Blade 180CFX Helicopters Information and Help


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Old 06-21-2017, 05:17 AM   #1 (permalink)
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Default Vibration problem, tried it all, Im clueless

I had this problem for very long time. Tried everything I thought would help but it did not .

First I thought it was TT clutch it was not as you can see vibration are there even without it. This also eliminates tail as it is not attached neither.
Thought it was head or swash but not there and still vibration. I have recently bought new motor I thought maybe that is the culprit but it wasn't. I am literally clue less. The main shaft is new, the bearings are good I changed them while ago I thought this would help but it did not.

What could this be ? I had that heli dismantled looked for any crack in the frame nothing there. The only think I have not replaced are the main shaft bearing and servo holders.

Any ideas before I really give up on this heli ? It does fly but its not good at all. I had enough. Thank s for any advise.

Here is short video :

180 cfx vibration problem (0 min 32 sec)
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Old 06-21-2017, 05:34 AM   #2 (permalink)
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So much camera movement that it's hard to see anything...especially a vibration

Skidding around on a smooth surface is common...

Tape the skids to the floor and hold the camera still...maybe someone can spot something
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Old 06-21-2017, 06:19 AM   #3 (permalink)
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Hi jamichx, I'm afraid this video doesn't really tell us much, most smaller models will vibrate to some extent on a smooth/hard surface.

What would be more helpful is if you could describe what's happening in the air. You said it fly's but not good. How does it fly? What is it doing in the air that is not good?
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Old 06-21-2017, 06:35 AM   #4 (permalink)
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Thank you for your replies. I will certainly make new video with the skids taped down to the floor.

What does it do in the air ? It shakes like a tree. It wobbles. I get cyclic wobble. Tried playing with PID no help. Changed main shaft, changed spindle, changed blades still the same. The head is solid I know the head is not the problem as it vibrates without it.

To the JonJet respond : my heli never danced like that. It would stay in one place at all times.

New video on its way give me a bit of time.
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Old 06-21-2017, 07:22 AM   #5 (permalink)
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Main shaft bearings. If the main shaft and feathering shaft are new that's all it can be. The only other thing that commonly causes that kind of behaviour in the air is sticky cyclic servo. You can check the servo's (throttle hold on) by applying slow collective/cyclic inputs and observing each servo to see if any of them appear jumpy or twitchy.

If servo's are OK, main shaft bearings.
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Old 06-21-2017, 11:08 AM   #6 (permalink)
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Here is my second video

180 cfx vibration problem part2 (0 min 57 sec)


I have also checked the servo and found one to be bad I will have to repair that one but this does not explain why such vibration anyway as all servos are not on when doing this test. Thank you for making me check them thought
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Old 06-21-2017, 01:49 PM   #7 (permalink)
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Motor main gear mesh too tight?
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Old 06-22-2017, 12:25 AM   #8 (permalink)
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Quote:
Originally Posted by navigator2011 View Post
Motor main gear mesh too tight?
Not at all , its set properly I would not make this mistake its beginners one and I am in this hobby for few years now. Thanks for asking anyway.
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Old 06-22-2017, 12:29 AM   #9 (permalink)
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Quote:
Originally Posted by Lotus 7 View Post
Main shaft bearings. If the main shaft and feathering shaft are new that's all it can be.

If servo's are OK, main shaft bearings.
I thought of this but they have only few flights. I can not feel any slop when moving main shaft and shaft rotate freely. Maybe I will replace them just to rule this one out its not so expensive test.

Edit: just found out my supplier does not have them I would have to buy whole blocks its another 25 Euros for me to spent just to see. I am not sure about this. I am fed up with this heli.

Last edited by jamichx; 06-22-2017 at 12:49 AM..
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Old 06-22-2017, 12:33 AM   #10 (permalink)
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I have bad feeling that this could be caused by gyro and that would be a expensive one to try. I hope my feeling is wrong. Only if I had one to just try but there is no one here to ask.

I really hope I am wrong.I loved this heli to fly but now its been on bench for so long. I spent lots of money and nothing helped. I feel like getting rid of it.
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Old 06-22-2017, 12:58 AM   #11 (permalink)
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It would be almost impossible that you changed to the belt tail and the gyro went bad...much too far fetched to think it was the cause...

The different sound it makes when you squeezed the side of the main frame at the battery points to the motor area as the source

I'd check the motor and swap it for another if you can...also check to make sure all the frame screws are properly tightened and the main bearings are properly seated in the bearing blocks

A couple threads have mentioned improperly installed bearings right from the box, but that seems out of the ordinary too...since the heli flew fine before...

Something has changed during the tail swap
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Old 06-22-2017, 01:20 AM   #12 (permalink)
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Quote:
Originally Posted by JonJet View Post
It would be almost impossible that you changed to the belt tail and the gyro went bad...much too far fetched to think it was the cause...

The different sound it makes when you squeezed the side of the main frame at the battery points to the motor area as the source

I'd check the motor and swap it for another if you can...also check to make sure all the frame screws are properly tightened and the main bearings are properly seated in the bearing blocks

A couple threads have mentioned improperly installed bearings right from the box, but that seems out of the ordinary too...since the heli flew fine before...

Something has changed during the tail swap
I dont have belt tail its stock just changed boom. Maybe aluminium tail boom case made you think that.

As I mentioned I have replaced motor already. What you see on the video is brand new motor.All the screws are tightened properly.

I think I will check the main shaft bearings. There may be a problem with them. Maybe I have made mistake and seated them improperly. That is the only option I have at the moment if I do not count FBL.

I hope FBL is ok.
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Old 06-22-2017, 02:13 AM   #13 (permalink)
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I would also check the front boom clamp to be sure it is seated properly inside the frame...

And insure that the tail boom is not forced too far inside the clamp making the tail drive gear too tight on the main gear

Also check the bearings for proper placement above and below the tail drive gear
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Old 06-22-2017, 05:37 AM   #14 (permalink)
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have you tried removing the main shaft, main gear? just the frame and motor running. spool it up on the floor and holding the heli with your hands as well, if still vibration then it's probably the motor. the stock motor is notorious for vibration even new ones. I had a new one happen to me once, after couple flights I'm right back to where I started.
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Old 06-22-2017, 08:02 AM   #15 (permalink)
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Quote:
Originally Posted by JonJet View Post
I would also check the front boom clamp to be sure it is seated properly inside the frame...

And insure that the tail boom is not forced too far inside the clamp making the tail drive gear too tight on the main gear

Also check the bearings for proper placement above and below the tail drive gear
this is all good I have checked that already but thank you so much for helping me

I have to try what it does with the main shaft and gear disconnected as prelude555 suggested.

its impossible no to find out i must be missing somthing very simple
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Old 06-22-2017, 09:31 AM   #16 (permalink)
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Cant believe it could be just this but I have tried run just motor and still getting those vibrations. Is this motor issue or could it be frame or gyro ? Is there anyway I can get rid of this motor vibration ?

I can leave with it if it was just motor vibes and that the servo problem that I discovered caused cyclic wobble. I will try to assemble the heli and test it and will report back but please if you still have any other ideas to try let me know.

Thank you again for your help guys you are the only people I have no rc flyers community around here.
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Old 06-22-2017, 09:36 AM   #17 (permalink)
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If you have another motor, that would most likely nail down the issue...

If you want to upgrade, here's the Lynx version that is much much stronger

http://www.ebay.com/itm/Lynx-Blade-1...wQAAOSw~oFXEUO~
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Old 06-22-2017, 09:41 AM   #18 (permalink)
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Quote:
Originally Posted by JonJet View Post
If you have another motor, that would most likely nail down the issue...

If you want to upgrade, here's the Lynx version that is much much stronger

http://www.ebay.com/itm/Lynx-Blade-1...wQAAOSw~oFXEUO~
Yes but this is another motor its brand new never flown. I have still the old one. Did you mean I should replace it for different brand ?
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Old 06-22-2017, 09:44 AM   #19 (permalink)
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You can try the old motor to see if it helps the problem...

The Lynx motor is much more powerful
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Old 06-22-2017, 12:25 PM   #20 (permalink)
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Quote:
Originally Posted by JonJet View Post
You can try the old motor to see if it helps the problem...

The Lynx motor is much more powerful
And lower flying time?
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