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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar. |
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05-10-2008, 12:55 AM | #1 (permalink) |
Join Date: Feb 2008
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Trex 450 SE V2 tail binding
Hi,
I am having problem with getting the tail to work without binding. I am using S9650 servo for the tail. It is running at 6v I setup the tail pitch slider in the centre. The server is 90 When i connect the servo to the gyro, put in Rate mode, set the Limit of the Gyro to the lowest, i am still getting the tail binding. I tried moving the servo along the tail boom, still having problem Any suggestion? |
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05-10-2008, 01:54 AM | #2 (permalink) |
Registered Users
Join Date: Dec 2007
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Try lowering the ball on the servo arm?
__________________
"Sort your head out and fly with your heart" Trex 450 SE V2: 9257 tail, Spartan Quark, HS65mg cyclic, DX7-AR7000, NEU 1107h/2y, Jazz Esc, Trex 550 FBL: Jive 100+LV, KDE/NEU 1907H/1/N42, Vbar 5.3, Futaba BLS 251 |
05-11-2008, 12:12 AM | #3 (permalink) |
Registered Users
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You should be setting the limit on the gyro higher, not lower to prevent binding. Bascially, you add limits to it.....
Skarn |
05-11-2008, 01:11 AM | #4 (permalink) | |
Join Date: Jul 2006
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Quote:
Limit Trimmer (LIMIT) Sets the maximum travel of the rudder servo. Move the rudder stick to the left and right and adjust the limit trimmer so that the servo operating angle do not strike the linkage. During flight, the servo will not operate beyond this angle and the linkage is protected. When the trimmer is turned clockwise, the servo operating angle increases. ( Source - http://manuals.hobbico.com/fut/futm0807-manual.pdf ) And if you take a look at the Gyro - I attached a drawing from the manual - clockwise is higher value. What I do is - I center the servo. I connect the rod with the links threaded at a normal distance (so they stay well on the link, and still can be adjusted both ways). Then I move the servo back and forth until I get a eye-balled center position at the tail pitch slider. Now I start and try endpoints from the RC - left and right. If I get a bigger value on one side (for example 70 ont he Right and 90 on the Left) I adjust the link - or, even move the servo - until I get equal End Point both ways (more or less..could be a 2-3 difference). Then I go straight to my 401 and input the same in limit. For example I have on my v2: Epa: ~80 both ways and Gyro Limit: 80. I use Futaba RC (so I guess the values are compatible). Also! When you do end points be shure to put the gyro on Normal Mode or even put the servo directly in the receveir, else the servo will not center and you wont be able to setup a proper EPA. I know the Limit setting is intuitive but I don't know how to test limit on the gyro. Seems to work for me though. Mike. |
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05-11-2008, 11:31 PM | #5 (permalink) |
Thread Starter
Join Date: Feb 2008
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got it working
thanks for the help Markleyland advice on "lowering the ball on the servo arm" did the trick |
05-12-2008, 01:20 PM | #6 (permalink) | |
Join Date: Jul 2006
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Quote:
Now enjoy it! Mike. |
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