Matching slider to servo travel
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Matching slider to servo travel
I have a 9C and am using it to contral a GP Lancair ARF. I have dual flap servos using chanel 5 slaved to chanel 6. I moved the "flap trim" from VR(A) to VR(D) as it is easier to reach while flying. The movement of the flaps works fine.
My issue is that I get full flap deployment when the VR(D) is half way through it's travel. I would like to get full flap movement when the slider is all the way back and 50% when the slider is half way through it's travel. Basically the position of the slider would mirror the position of the flaps.
Is there any way to accomplish this? I attempted to set up a curve mix but didn't seem to get the results I needed, or I did it wrong.
Thanks,
Kent
My issue is that I get full flap deployment when the VR(D) is half way through it's travel. I would like to get full flap movement when the slider is all the way back and 50% when the slider is half way through it's travel. Basically the position of the slider would mirror the position of the flaps.
Is there any way to accomplish this? I attempted to set up a curve mix but didn't seem to get the results I needed, or I did it wrong.
Thanks,
Kent
#2
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RE: Matching slider to servo travel
Move the slider to one end. The servo will then move to one end of its travel. Set up the flaps for the fully-retracted position. Move the slider to the other end. The servo will move to the other end of its travel. Set up the flaps so that they are fully-deployed. Now one end of the slider's movement will have the flaps at the full "up" position, and the other end of the slider's movement will have the flaps at the full "down" position.
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RE: Matching slider to servo travel
This is exactly what I thought I did when I originally installed the servos. I'll double check my installation.
Now that I think about it, the neutral position of the servo should be the center position of the slider, right? I think thats what I may have done incorrectly is set the neutral servo position to be fully retracted flaps via the servo arm position.
Thank you for your assistance.
Kent
Now that I think about it, the neutral position of the servo should be the center position of the slider, right? I think thats what I may have done incorrectly is set the neutral servo position to be fully retracted flaps via the servo arm position.
Thank you for your assistance.
Kent
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RE: Matching slider to servo travel
Bax,
I double checked my linkage, and I have it set up exactly as you described. I guess my real problem is that I have too much mechanical travel and I can't see a way to shorten the servo arm enough to solve the problem.
So, from a programming standpoint, I need to make 1 click of the slider move the servo some lesser precentage of travel (roughly 50%). Anyway to do that on the 9C?
Kent
I double checked my linkage, and I have it set up exactly as you described. I guess my real problem is that I have too much mechanical travel and I can't see a way to shorten the servo arm enough to solve the problem.
So, from a programming standpoint, I need to make 1 click of the slider move the servo some lesser precentage of travel (roughly 50%). Anyway to do that on the 9C?
Kent
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RE: Matching slider to servo travel
Edgar,
Yea me too but I seem to get odd results (flaps moving at different rates) when I do that. I headed out to the field tonight after work so I'll tinker with it some more.
BTW, it's called End Point now.
Also BTW, I don't think anyone but Futaba support is supposed to post here. I appreciate your help but you might get poked by the moderator.
Kent
Yea me too but I seem to get odd results (flaps moving at different rates) when I do that. I headed out to the field tonight after work so I'll tinker with it some more.
BTW, it's called End Point now.
Also BTW, I don't think anyone but Futaba support is supposed to post here. I appreciate your help but you might get poked by the moderator.
Kent
#9
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RE: Matching slider to servo travel
If you have too much mechanical travel, you'll have to either drill new holes in the servo arm closer to the center, use a longer control horn at the flap, or work with the electronics. If you lower the ATV on the main flap channel, and then reset the linkages, you'll get that surface operating properly. Then you adjust the percentage of mix for the second channel while working with the linkages. It would likely be best if you use p-mix #6 or #7 because they have the 5-point mixes, which will give you better control over the slave channel's operation.
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RE: Matching slider to servo travel
Bax,
Thanks, you have confirmed I'm on the right track I just need to keep working on the linkage and end point. Good advice on using the primary flap channel as the base line. I was messing with the slaved channel (just because of the way the plan happened to be pointing on the bench) and I was just frustrating myself.
Kent
Thanks, you have confirmed I'm on the right track I just need to keep working on the linkage and end point. Good advice on using the primary flap channel as the base line. I was messing with the slaved channel (just because of the way the plan happened to be pointing on the bench) and I was just frustrating myself.
Kent