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HelicopterMain Discussion › Help: JR6102 Gear Channel Setting for GY401 Gain
01-28-2007 10:33 PM  10 years agoPost 1
rudyy

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E. Amherst, NY

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I go through GY401 manual, and still I do not understand the gain value in both HH and non-HH modes in my JR6102 gain channel. Right now, I have my gear channel value at +70% and -30% respectively for HH and non HH modes. Does that mean the gain value is 70% for HH and 30% for non HH?

I am confused by the 401 manual saying that the gear channel value at 50% would mean 0% gain. Therefore, I am thinking that the gear channel at 70% which I am having now would mean 40% gain. Likewise, -30% gear channel value would mean 60% gain. This is now may be all wrong.

I am asking this because my s9254 tail servo fails. I am afraid this has something to do with the gain value too high.

Rudy

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01-28-2007 10:46 PM  10 years agoPost 2
flipped2left

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indianapolis,in.

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AS far as i know is to keep all revolution mixing at zero on your tx and only adjust the gain on the 401, at least thats how mine is set up oh and the gear channel is only used to switch from HH to avcs, hope this helps

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01-28-2007 10:51 PM  10 years agoPost 3
rudyy

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E. Amherst, NY

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But where do you adjust the gain value if you are not using the gear channel?

Rudy

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01-28-2007 11:05 PM  10 years agoPost 4
flipped2left

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indianapolis,in.

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the 401 plugs into the rudder channel... the single signal wire(blue/green) plugs into aux 1 or gear channel, there is no necessary adjustment for the single, signal wire,this is only to switch from hh to non hh, the rudder (tail servo) plugs into the 401, there is a gain adjustment on the 401 as well as a reverse switch and a switch for a digital servo if you are using one

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01-28-2007 11:18 PM  10 years agoPost 5
wuzofoz

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Brisbane,Queensland- Australia

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well thats news to me flipped.
mine has a delay and limit pot and gain is adjusted in the radio.

rudyy.
if your useing gear for gain you are correct that 70 and 30 are you gain values.

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01-28-2007 11:21 PM  10 years agoPost 6
rudyy

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E. Amherst, NY

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flipped2left, I have never seen a 401 has a gain adjustment on the gyro itself. That is new to me too. I only know GY240 does.

wuzofoz, thanks for the information.

Rudy

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01-28-2007 11:21 PM  10 years agoPost 7
flipped2left

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indianapolis,in.

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My revolution mixing for tail is set at zero, my travel is adjusted on the tx,the gain is on the 401 which is set at about 50% and this is on my gasser, never had a prob here.

Smile! people will wonder what you're up to!!

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01-28-2007 11:31 PM  10 years agoPost 8
wuzofoz

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Brisbane,Queensland- Australia

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sry rudyy this should have been in previous post.
i think 70 gain is to high.
how much mecanical gain do you have ( center of servo horn to center of ball ). i beleave (not 100% sure) that it should be 15 to 17 mm on a heli like your evo.

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01-29-2007 01:49 AM  10 years agoPost 9
rudyy

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E. Amherst, NY

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I thought I am using 40% gain, but it turns out to be 70% instead due to the misunderstanding. Yes, it is too high.

Rudy

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01-29-2007 03:05 AM  10 years agoPost 10
TMoore

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Cookeville, TN

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Here's the way it works when you plug the 401 into the gear channel.

Fact: The only adjustment on the 401 itself, is DS mode for the servo, ATV's for the servo, Delay to control bounce or overshoot when using analog servos and either normal or reverse for the servo.

Fact: The gyro has to be plugged into two ports on the RX, the ruddder port and a gain port. It doesn't matter if you use an aux channel, the gear channel or an adjustable pot as long as you can change the gains. I'm not suggesting you use a pot but you could.

Fact: The gain controls two things on a 401, it controls whether or not the gyro is in AVCS/HH mode and/or rate mode and it controls the gains in either modes.

The instructions assume you are using a Futaba TX.

Set the gains intially to +50 and -50 to start and fine tune from there. Make sure when you boot up the 401 that the light glows solid, that means the gyro is in AVCS/HH mode.

TM

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01-29-2007 04:38 AM  10 years agoPost 11
Shoego Heli

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San Diego, CA, USA

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Set the gear settings @ >/= to 52% but probably around 80% for position 1 and 0. This should keep the tail under control.

Having my heli: Cool, Having a working heli: Awesome, Having a day to fly: PRICELESS!

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01-29-2007 04:46 AM  10 years agoPost 12
flipped2left

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indianapolis,in.

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Well all in all you should have gotten an instruction sheet with the 401, but anyway.. the delay adjustment is more or less your gain adjustment as well and then the limit is for travel allowances, there is 2 switches, one for if you have a digi. servo or an analog,then there is also a reverse switch as well and T moore is correct! ken

Smile! people will wonder what you're up to!!

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01-29-2007 04:53 AM  10 years agoPost 13
rudyy

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E. Amherst, NY

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the delay adjustment is more or less your gain adjustment
The delay adjustment is meant for servos with slower response time. I set the delay adjustment to zero for s9254 servos.

Rudy

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01-29-2007 05:07 AM  10 years agoPost 14
flipped2left

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indianapolis,in.

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why would a slow servo need a delay? you would think it would need a faster response

Smile! people will wonder what you're up to!!

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01-29-2007 02:39 PM  10 years agoPost 15
TMoore

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Cookeville, TN

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why would a slow servo need a delay? you would think it would need a faster response
This adjustment is designed to eliminate bounce on tail stops with analog servos not necessarily slow ones but servos that aren't digitals. With a 9254 or 53 servo no delay is needed. The delay pot doesn't control gain, that comes from the aux/gear channel in the TX. The values in that channel control gyro gain.

TM

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HelicopterMain Discussion › Help: JR6102 Gear Channel Setting for GY401 Gain
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