Eclipse7 and dual elevator servos?
02-13-2004 | 06:09 PM
#1
Thread Starter
Senior Member
Eclipse7 and dual elevator servos?
Mike, is it possible to program two elevator servos (split elevators with a servo on each) by using two channels and one of the mixes instead of a Y-harness? I love my Eclipse but the manual leaves a lot to be desired.
02-13-2004 | 08:21 PM
#2
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RE: Eclipse7 and dual elevator servos?
Mike is away for a bit. I'll try and help.
The Eclipse has several mixes available to manually program as you desire. BUT there are default mixes and these may serve your needs. Activate a mix, adjust the variables and use two servos with their respective connectors into the listed RX ports, and the servos will work as one. This method is preferred over a wye. You are able to center and adjust the surface end-points as needed.
As mentioned below, the single problem I note for your application is the mix MUST be activated by a switch, this switch must be left in the ON position...
The Eclipse has several mixes available to manually program as you desire. BUT there are default mixes and these may serve your needs. Activate a mix, adjust the variables and use two servos with their respective connectors into the listed RX ports, and the servos will work as one. This method is preferred over a wye. You are able to center and adjust the surface end-points as needed.
As mentioned below, the single problem I note for your application is the mix MUST be activated by a switch, this switch must be left in the ON position...
02-13-2004 | 08:27 PM
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From: Melbourne, AUSTRALIA
RE: Eclipse7 and dual elevator servos?
Hey hows it going everyone.
Hope this info might help a little, as I recently tried to do the same thing.
After trying to use mixing and plug the servo's into the receiver separately, I ended up using a "Y" lead to connect the two servo's, and a programmer to set the servo's up.
At first I thought that I would try mixing the two servo's,eg: ch2 and ch5(like you mentioned)
This seems like a good idea as you eliminate a weak link(Y lead) in a dual elevator setup.
However when mixing like this with Eclipse I found that it was a little tricky as you cant assign, or de-activate switches.
The mixing part is pretty easy, if you have a manual it explains how to use the programmable mixing on page 17.
I used CH2 as master elevator, and CH5 as slave elevator.(MODE 1).
CH6 and CH7 were already taken, CH6 was my left aileron servo and CH7 was fuel mixture, so CH5 was the only one free.
The thing I didnt like when set up using the mixing was that you cant turn the switch or knob off for CH5,(elevator slave servo),,,, this means that when you moved the CH5 switch it would move the elevator, I thought this would be a little dangerous. It gets pretty messy with the mixing, and you might also find that in some circumstances the elevators are not working properly. Like if you hit the flap switch and dial in some elevator for pitch correction, I found that only one half moved,(it forgot to move slave servo), also I heard some problems that the trim only moves one half.
As already mentiond I ended up just using a "Y" lead. With the "Y" lead you know both servos will move at exactly the same time. Thats what I liked about a "Y" lead.
"Y" lead was much more simple and works fine, only thing if the Y lead breaks I lose all elevator control.
Hope this doesnt confuse you all the more. Also why didnt YOU want to use a "Y" lead?
Good luck
CYA
Hope this info might help a little, as I recently tried to do the same thing.
After trying to use mixing and plug the servo's into the receiver separately, I ended up using a "Y" lead to connect the two servo's, and a programmer to set the servo's up.
At first I thought that I would try mixing the two servo's,eg: ch2 and ch5(like you mentioned)
This seems like a good idea as you eliminate a weak link(Y lead) in a dual elevator setup.
However when mixing like this with Eclipse I found that it was a little tricky as you cant assign, or de-activate switches.
The mixing part is pretty easy, if you have a manual it explains how to use the programmable mixing on page 17.
I used CH2 as master elevator, and CH5 as slave elevator.(MODE 1).
CH6 and CH7 were already taken, CH6 was my left aileron servo and CH7 was fuel mixture, so CH5 was the only one free.
The thing I didnt like when set up using the mixing was that you cant turn the switch or knob off for CH5,(elevator slave servo),,,, this means that when you moved the CH5 switch it would move the elevator, I thought this would be a little dangerous. It gets pretty messy with the mixing, and you might also find that in some circumstances the elevators are not working properly. Like if you hit the flap switch and dial in some elevator for pitch correction, I found that only one half moved,(it forgot to move slave servo), also I heard some problems that the trim only moves one half.
As already mentiond I ended up just using a "Y" lead. With the "Y" lead you know both servos will move at exactly the same time. Thats what I liked about a "Y" lead.
"Y" lead was much more simple and works fine, only thing if the Y lead breaks I lose all elevator control.
Hope this doesnt confuse you all the more. Also why didnt YOU want to use a "Y" lead?
Good luck
CYA
03-09-2004 | 02:41 AM
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From: BadajozBadajoz, SPAIN
RE: Eclipse7 and dual elevator servos?
Good morning!
There are other posts about this subjetc. Chanel 5 is an on/off one, so it isn't usefull, and there is the slave channel trim problem. I found one way, and this was my reply.
I found one way on my Eclipse 7:
My plane set up is as follows.-
Two halves elevator, with independent servos. These are at diferent vertical distance (not enough room), but the link points are at the same,and a perfect simetric configuration. And I use flaperons option. One more thing: I fly on Mode I (don't worry).
1ΒΊ Mix 1- channel 2 with 7 at 100% both ways
2ΒΊ Set exact same halves height with channel 2 trim or subtrims.
3ΒΊ Correct differents throws with EPA
4ΒΊ Mix 2- channel 7 to channel 2 at 100% both ways
Now you can use channel 7 pot as elevator trim. There is a minor problem, as it would be too much potent in flight. To solve this, and if you have another free channel (if you do not use flaperons), f.e. channel 6, set another mix 3- channel 6 to 7, and a little percentage in both ways, as your convenience.
I tested the first way, and its easy as I manage elevator with left hand, and 7 pot is in the right. If you fly Mode II, and without flaperons, set the mix as properly as you use rigth hand on elevator and the left on the the channel 6 pot. (changing 7 by 6 on the upper instruccions, and viceversa)
There are other posts about this subjetc. Chanel 5 is an on/off one, so it isn't usefull, and there is the slave channel trim problem. I found one way, and this was my reply.
I found one way on my Eclipse 7:
My plane set up is as follows.-
Two halves elevator, with independent servos. These are at diferent vertical distance (not enough room), but the link points are at the same,and a perfect simetric configuration. And I use flaperons option. One more thing: I fly on Mode I (don't worry).
1ΒΊ Mix 1- channel 2 with 7 at 100% both ways
2ΒΊ Set exact same halves height with channel 2 trim or subtrims.
3ΒΊ Correct differents throws with EPA
4ΒΊ Mix 2- channel 7 to channel 2 at 100% both ways
Now you can use channel 7 pot as elevator trim. There is a minor problem, as it would be too much potent in flight. To solve this, and if you have another free channel (if you do not use flaperons), f.e. channel 6, set another mix 3- channel 6 to 7, and a little percentage in both ways, as your convenience.
I tested the first way, and its easy as I manage elevator with left hand, and 7 pot is in the right. If you fly Mode II, and without flaperons, set the mix as properly as you use rigth hand on elevator and the left on the the channel 6 pot. (changing 7 by 6 on the upper instruccions, and viceversa)
