Problem with gy 611

[FrenkyL]

Hi, i have problem with my new gyro Futaba 611 on my Trex 600N, in hover the tail not keep on one position, always the helicopter turn over, I have trims and subtrims on zero position, I wanted to trim the tail mechanically, but the tail not keep, while is a tail pitch on right side, or left side on the tail spindle. I have radio JR pcm 9xII. Sorry on behalf of my english. :shock:

[invertmast]

are you in rate mode of heading hold mode? If your trying to get the tail trimmed to hold a heading in Rate mode, you need to adjust the length of the tail rotor pushrod (the one on the boom) to get rid of the drifting.

[sparky]

Check the gain on your controller. If it says AVC or Norm. If it says NORM, then you will need to change your gain setting in your radio above 50. on the 9x2, below 50 is normal and above 50 is heading hold.

[sparky]

Also, back to basics. If you move your stick right, the slider should move to the left. If not, reverse rudder in the radio. And when you pull the tail to you in AVC or Heading hold, the slider should move away. If not, reverse Gyro direction in the controller.

[invertmast]

Also, back to basics. If you move your stick right, the slider should move to the left. If not, reverse rudder in the radio. And when you pull the tail to you in AVC or Heading hold, the slider should move away. If not, reverse Gyro direction in the controller.

if he's able to hover it, i'd assume he has the directions correct. From what i'm gathering from his post.. he's trying to get the tail to not drift in a hover w/ the gyro in either the normal or AVCS (heading hold) position. Which one, i'm not sure.

[sparky]

The way I read it is that it wont stop pyroing, so just maybe, it could be a basic set up problem.

Man, this site is starting to get like the other one. I keep reading where some one makes a post in a wrong area, or people try to help some one with a limited post, and people just jump down throats.
Might as well sign in on the other site. I have stayed away from for reasons like this!

[invertmast]

The way I read it is that it wont stop pyroing, so just maybe, it could be a basic set up problem.

Man, this site is starting to get like the other one. I keep reading where some one makes a post in a wrong area, or people try to help some one with a limited post, and people just jump down throats.
Might as well sign in on the other site. I have stayed away from for reasons like this!

dude... didn't mean any disrespect if thats how you took it that way. i just interpreted his post a different way than you did and was putting a bit more info into the thread just incase he didn't understand what i meant the first time or what you meant.
Dont take it personal, I was just trying to help the OP out as much as possible w/o getting him 2 confused. since he mentioned he doesn't have the best english.

[FrenkyL]

I tried trimmed it at first in normal mode and whne it was good(the tail stop pyroing) so I switch the tripper on radio to AVCS mode, so the tail began pyroing...this problem was, when I have in the gyro CMT mod, now I have in gyro only AVCS mode and now when I trimm the tail in radio is it good, but when I switch off the receiver after land, then I switch it on, the tail begin pyroing, so I tried to trimmed it mechanically, but the slider is in outer position on the shaft.:dontknow The servo reverse and gyro reverse is setup good.

[sparky]

Just out of curiosty, when you turn on your reciever, are you not touching the heli until your tail slider centers itself? I am just curious because this is the first time I have heard of this with a 611. No offense, but have you watched the Finless vid for building the 600 e. He goes into detail on how to set up a 611. By reading the manual, it is confusing to someone who is fluent in english. And he covers some things that are not in the manual.

[FrenkyL]

I haven't seen the video, can you send me some link to video? And if I switching on the reciever I not touching on heli, I know, that I can´t it do, but thanks on behalf of suggestions. I know my english is bat, on basic school I puff at learning english and now I catch up, so that manual in english is for me sometimes horrible:YeaBaby:

[FrenkyL]

I have already found the video, I was slavish:)

[invertmast]

First off, never use trim on a heading hold gyro. The reason you were getting the drift is because. When you turned the heli on w/ the trim in the center, the gyro noted this position as "center". When you put the heli in the hover and used the trim to stop the drift, then put the heli in AVCS/heading hold mode, it took this trim position as a "stick input" causing the drift in AVCS mode. Then when you turned the heli off and turned it back on, the gyro noted the trim position from the previous flight as the "center" position. So when you put it up in the hover the heli would drift again.

To fix it do the following:

1. Turn on your transmitter and put the trim back to center.
2. Put the gyro switch in the AVCS/heading hold position
3. Turn on the helicopter and do not touch it until the display read AVCS.
4. Check to make sure the tail rotor servo arm is 90 degrees to the short tail rotor pushrod.
5. Check to make sure the tail rotor belcrank is 90 degrees to the short tail rotor pushrod.
6. Start the heli and bring it in a hover and note which direction the nose wants to turn.
7. Adjust the length of the LONG tail rotor pushrod to eliminate as much as the drift as possible (its best to do this on a day with little to no wind).
8. When as much as the drift is eliminated, put the heli into AVCS mode and enjoy.


Also, when setting up the GY611 use a 115-120 value for the Limit A and Limit B settin and use 32-37 percent for the gyro gains in all modes.

[BenHeli]

First off, never use trim on a heading hold gyro. The reason you were getting the drift is because. When you turned the heli on w/ the trim in the center, the gyro noted this position as "center". When you put the heli in the hover and used the trim to stop the drift, then put the heli in AVCS/heading hold mode, it took this trim position as a "stick input" causing the drift in AVCS mode. Then when you turned the heli off and turned it back on, the gyro noted the trim position from the previous flight as the "center" position. So when you put it up in the hover the heli would drift again.

To fix it do the following:

1. Turn on your transmitter and put the trim back to center.
2. Put the gyro switch in the AVCS/heading hold position
3. Turn on the helicopter and do not touch it until the display read AVCS.
4. Check to make sure the tail rotor servo arm is 90 degrees to the short tail rotor pushrod.
5. Check to make sure the tail rotor belcrank is 90 degrees to the short tail rotor pushrod.
6. Start the heli and bring it in a hover and note which direction the nose wants to turn.
7. Adjust the length of the LONG tail rotor pushrod to eliminate as much as the drift as possible (its best to do this on a day with little to no wind).
8. When as much as the drift is eliminated, put the heli into AVCS mode and enjoy.


Also, when setting up the GY611 use a 115-120 value for the Limit A and Limit B settin and use 32-37 percent for the gyro gains in all modes.

Well explained.:thumbup:

[sparky]

I am sorry, but I dont know how to post a link. But when you first open heli freak, there is a site called Finless Bobs tech room. Open it and look for the Trex 600 Electric build videos. Open it and look for Gyro. Or even easier, PM Bob and ask him for a link to the 611 videos.

Keep us posted, as I am very interested in what is wrong.

[invertmast]

Well explained.:thumbup:

yea.. you'd think i know what i'm talking about at times. haha :D

[FrenkyL]

All thanks, the sensor of the gyro is broken, so I´m not so stupid, how I do think:YeaBaby:

[latesleeper]

Do you guys setup any delays on a 600N with torque tube?

[sikorskys76]

First off, never use trim on a heading hold gyro. The reason you were getting the drift is because. When you turned the heli on w/ the trim in the center, the gyro noted this position as "center". When you put the heli in the hover and used the trim to stop the drift, then put the heli in AVCS/heading hold mode, it took this trim position as a "stick input" causing the drift in AVCS mode. Then when you turned the heli off and turned it back on, the gyro noted the trim position from the previous flight as the "center" position. So when you put it up in the hover the heli would drift again.

To fix it do the following:

1. Turn on your transmitter and put the trim back to center.
2. Put the gyro switch in the AVCS/heading hold position
3. Turn on the helicopter and do not touch it until the display read AVCS.
4. Check to make sure the tail rotor servo arm is 90 degrees to the short tail rotor pushrod.
5. Check to make sure the tail rotor belcrank is 90 degrees to the short tail rotor pushrod.
6. Start the heli and bring it in a hover and note which direction the nose wants to turn.
7. Adjust the length of the LONG tail rotor pushrod to eliminate as much as the drift as possible (its best to do this on a day with little to no wind).
8. When as much as the drift is eliminated, put the heli into AVCS mode and enjoy.


Also, when setting up the GY611 use a 115-120 value for the Limit A and Limit B settin and use 32-37 percent for the gyro gains in all modes.


IS there a step that i missed here? You said to put it into AVCS mode and enjoy.Was the whole set up done in AVCS? Is there any set up at all in the normal mode?

Thanks

Derik

[invertmast]

IS there a step that i missed here? You said to put it into AVCS mode and enjoy.Was the whole set up done in AVCS? Is there any set up at all in the normal mode?

Thanks

Derik


Oops... go by this:

To fix it do the following:

1. Turn on your transmitter and put the trim back to center.
2. Put the gyro switch in the AVCS/heading hold position
3. Turn on the helicopter and do not touch it until the display read AVCS.
3A. Flip the gyro switch to put it in RATE mode.
4. Check to make sure the tail rotor servo arm is 90 degrees to the short tail rotor pushrod.
5. Check to make sure the tail rotor belcrank is 90 degrees to the short tail rotor pushrod.
6. Start the heli and bring it in a hover and note which direction the nose wants to turn.
7. Adjust the length of the LONG tail rotor pushrod to eliminate as much as the drift as possible (its best to do this on a day with little to no wind).
8. When as much as the drift is eliminated, put the heli into AVCS mode and enjoy.

[fogger]

I run the start and stop acceleration delays suggested by Nigel Brown in the setup guide I posted a while back. Let me know if you need the link, feeling too lazy to search for it right now ;). Or just search for Nigel 611 setup and you should find it.

-Fog

[invertmast]

I run the start and stop acceleration delays suggested by Nigel Brown in the setup guide I posted a while back. Let me know if you need the link, feeling too lazy to search for it right now ;). Or just search for Nigel 611 setup and you should find it.

-Fog

+1
i believe i set my stops to 30.. didn't run any start delays

[sikorskys76]

thanks alot guys!!

When you have time can you give me the link?

[fogger]

http://www.helifreak.com/showthread.php?t=38075

There you go!

-Fog

[sikorskys76]

Thanks alot!!