Vibration on spool up and down

Heli man01 · 04-23-2012, 05:21 PM

Hey guys,

My 600e pro has an odd vibration at a certain low headspead when throttling up, and when throttling down. What could be causing this? Out of ballance blades, a bad bearing, etc?

satgod · 04-23-2012, 06:50 PM

yea mine does to
and you can almost bet its that align motor

Heli man01 · 04-23-2012, 07:10 PM

I don't think its my motor. I wanna say its a bearing or the torque tube. Any other ideas?

Commodore8888 · 04-23-2012, 09:35 PM

Frequency of the vibe at which headpseeds is very important. Location is needed too.

First thing to do is minimize variables. Take the head off and run it up (you can bench run at 3 to 6s for slower testing speeds). If the vibe is not present, suspect the head/blades. If it's still there but is slower in pulse than tail rpms, suspect main gear, owb, auto gear wobbles, etc. If you find the vibes are high in speed even at lower head rpms, check the tail, then the TT for being straight(I've had ones out of true from the factory).

The motor being out of balance can cause highfreq vibes, but are normally pretty low in strength since the motor has a low diameter of mass compared to the tail. It would have to be bad enough that you would likely see the offset on the motor.

Heli man01 · 04-24-2012, 05:39 PM

all righty then. I will start testing it and see what it is.

jonbailie · 04-25-2012, 02:22 PM

Does it run ok when the headspeed is higher? I would start by balancing the blades, and while they're off for balancing, spool it up without the blades to check for vibrations. Out of balance blades can cause vibrations or wobbles at certain (usually slower) headspeeds. There will be some vibration at high headspeeds, too, but certain resonant frequencies can show up while spooling up or down. I'd bet balanced blades would make a big difference.

If that doesn't help, hopefully something will show up when you spool it up without the blades. From there, you just need to run through the things that commodore listed in order to troubleshoot it.

Heli man01 · 04-27-2012, 10:06 PM

I will try balancing the blades. From everything you all said, it sounds like they are the problem. Will give it a try.

04-23-2012, 05:21 PM	#1
Heli man01 Registered Users Join Date: Mar 2012 Location: Arlington, Washington	Vibration on spool up and down Hey guys, My 600e pro has an odd vibration at a certain low headspead when throttling up, and when throttling down. What could be causing this? Out of ballance blades, a bad bearing, etc? __________________ -Trex 600efl pro- -Trex 450 pro V2

04-23-2012, 06:50 PM	#2
satgod Registered Users My HF Map location Join Date: Apr 2011 Location: USA,KY,Rineyville	yea mine does to and you can almost bet its that align motor __________________ Trex 600EFL Pro V2 V-Bar ds610 ds650 cc pro bec Scorpion 130a HV KDE 600XF-530 450pro 1860kv(6s) cc50 (4 DS215MG) 10t pinion, Tarot DFC, Ikon TBS Discovery (Quad), naza-gps, 900mhz fpv, gopro2, ET OSD pro, D/L UHF X-8 Wing , D/L UHF Full fpv package

04-23-2012, 07:10 PM	#3
Heli man01 Registered Users Thread Starter Join Date: Mar 2012 Location: Arlington, Washington	I don't think its my motor. I wanna say its a bearing or the torque tube. Any other ideas? __________________ -Trex 600efl pro- -Trex 450 pro V2

04-23-2012, 09:35 PM	#4
Commodore8888 Registered Users My HF Map location Join Date: Apr 2011 Location: Rockville, Maryland	Frequency of the vibe at which headpseeds is very important. Location is needed too. First thing to do is minimize variables. Take the head off and run it up (you can bench run at 3 to 6s for slower testing speeds). If the vibe is not present, suspect the head/blades. If it's still there but is slower in pulse than tail rpms, suspect main gear, owb, auto gear wobbles, etc. If you find the vibes are high in speed even at lower head rpms, check the tail, then the TT for being straight(I've had ones out of true from the factory). The motor being out of balance can cause highfreq vibes, but are normally pretty low in strength since the motor has a low diameter of mass compared to the tail. It would have to be bad enough that you would likely see the offset on the motor. __________________ Resident Mad Scientist E5-S KDE 600XF / 600N 55HZ 450 Pro V3 / Mod 130x / mCPX BL Mike D--AwesomeRC Hobbies

04-24-2012, 05:39 PM	#5
Heli man01 Registered Users Thread Starter Join Date: Mar 2012 Location: Arlington, Washington	all righty then. I will start testing it and see what it is. __________________ -Trex 600efl pro- -Trex 450 pro V2

04-25-2012, 02:22 PM	#6
jonbailie Registered Users Join Date: Sep 2011 Location: Savannah, Georgia	Does it run ok when the headspeed is higher? I would start by balancing the blades, and while they're off for balancing, spool it up without the blades to check for vibrations. Out of balance blades can cause vibrations or wobbles at certain (usually slower) headspeeds. There will be some vibration at high headspeeds, too, but certain resonant frequencies can show up while spooling up or down. I'd bet balanced blades would make a big difference. If that doesn't help, hopefully something will show up when you spool it up without the blades. From there, you just need to run through the things that commodore listed in order to troubleshoot it. __________________ // T-Rex 600EFL Pro 3GX // T-Rex 450 Pro V2 3GX // T-Rex 250 Pro DFC 3GX // // Walkera V120D02-S (x2) // Walkera V120D02 // Walkera Genius CP (x3) // // EFlite Blade MCPX (x2) // EFlite Blade 120SR // E-Sky Belt CPX // // WK2801 // Spektrum DX4e //

04-27-2012, 10:06 PM	#7
Heli man01 Registered Users Thread Starter Join Date: Mar 2012 Location: Arlington, Washington	I will try balancing the blades. From everything you all said, it sounds like they are the problem. Will give it a try. __________________ -Trex 600efl pro- -Trex 450 pro V2

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