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jr xp662

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Old 04-15-2004, 09:20 AM
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kev_79
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I'm having trouble getting the servo travel that I think I should have and I am trying to eliminate if the servos are the factor. It seems that I have more travel in one direction than the other. I am using a flaperon setup.

Also, how do you adjust the travel when you have the flaperons activated. Mine go too far. Is there documentation somewhere that walks you through a flaperon setup?

Thanks,
Kevin
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Old 04-15-2004, 10:42 AM
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HarryC
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Kevin,

Don’t worry, the only problem is the poor manual that comes with the 642/652/662. It doesn’t explain what happens when you activate flaperon, and it leaves you hanging.

In choosing the flaperon wing, the radio sends signals from both the aileron stick and the flap switch. By default both are set to 100% travel. So though your aileron stick is at neutral, your flap switch is at one of its ends so it is sending a full travel signal to the servo. What you think is your servos at centre is actually at full travel, you have full up spoiler or full down flap without realising it! Then when you wiggle the aileron stick, one servo moves back towards centre which is fine, but the other is already almost at the end of its travel when the aileron stick is at neutral, it moves to its physical end stop and stops there long before the other servo reaches the end of its travel. That makes it look like you are getting more travel one way than the other.

The trick is to go into the travel menu, choose flap, see it is set at 100%, turn that down to 0%, then move the flap switch, see travel in that direction is also at 100% turn that down to 0%. While you are dialing down that amount your aileron servos will be rotating back to their true neutral, which is a long way off where you had them. Just unscrew the servo arm and move it around the splines back to the proper neutral.

As you find, you can not use travel adjust on aileron because that just affects one servo, not both. Stupid, eh?! And do the instructions help you? No. The aileron dual rate switch has a value for each direction of the switch, normally you would leave it at 100% in one direction. What you can do is use that 100% and adjust that as the aileron travel adjust.

Harry
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Old 04-15-2004, 10:56 AM
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kev_79
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Default RE: jr xp662

Thanks for the info Harry. I assume that once I set my ailerons up from their true neutral position, I should go back into the flap travel adjustment and give a percentage of travel for the switch position I want to use to activate flaperons. Did that make sense?

Thanks again,
Kevin
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Old 04-15-2004, 11:00 AM
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HarryC
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That's it.

H
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Old 05-04-2004, 06:10 PM
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Would this setup work on the JR8103 also - I am trying to setup flaperons on my AT6-TExan and struggling with the instructions, or should I say lack of .....Bill
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Old 05-04-2004, 08:26 PM
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kev_79
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Default RE: jr xp662

not for sure, but probably. If you go to a new plane, or reset one. Go in and turn on flaperons, then go to flaperon travel. If it says 100%, that's probably your problem b/c you can't find the true center of the servo w/o setting flaperon travel to zero first.

let me know if this helps,

k
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