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HomeAircraftHelicopterHelicopter Main Discussion › GY401 A Little Assistance
04-22-2009 12:46 AM  9 years agoPost 1
DSW

rrApprentice

Oviedo, Florida 32765

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Have a 401 on a blade 400 with a Hitec HS-5083MG servo.

Servo Specs: Speed: 0.07 sec
Torque: 21 oz.in
Weight: 21.70g

TX: JR X9303
RX: AR6100e

Gyro connected to Rudd channel, Gain connected to Gear channel. Gyro set to FM (Flight Mode) switch.
Gyro Travel Limt set on gyro as low as possible 60% (seemed to help)
Gyro Gain set to 60%
Push-rod pivot ball about 10.5m from center on servo arm.

First off, I can not get the gyro into Rate (Normal) Mode.

When I run the Heli up (No Main Blades attached), everything is smooth, until I give some Right Rudder. The Heli then begins a very rapid tail wag. I then give Left rudder input and everything calms down and runs smooth.

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04-22-2009 12:48 AM  9 years agoPost 2
Wingman77

rrProfessor

Pulaski Tennessee

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sounds like you have the gain plugged into the rudder channel

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04-22-2009 12:49 AM  9 years agoPost 3
TaleGunner

rrElite Veteran

Deer Park WA

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Gain does nothing use endpoint setting to change gain.

if you have the data safe software and cable I can send you the setup file from my x9303.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-22-2009 12:52 AM  9 years agoPost 4
Santiago P

rrProfessor

South West, Ohio

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Move your pivot ball to 7mm or less from center on servo arm.

If it still wags, go with less, then readjust your endpoint settings (and gain)

Santiago

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04-22-2009 12:55 AM  9 years agoPost 5
TaleGunner

rrElite Veteran

Deer Park WA

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just adjust the gain with endpoints from the gear channel as the gyro gain does nothing when using the 9303 and a 401. I tried until I was blue in the face. I have a 401 on blade 400 and it works great.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-22-2009 12:58 AM  9 years agoPost 6
krashtagain

rrKey Veteran

ohio

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Gyro set to FM (Flight Mode) switch.

Where is this switch located at ? Do you mean HH or Rate ?

If you're not living on the edge you're just taking up space !

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04-22-2009 01:30 AM  9 years agoPost 7
DSW

rrApprentice

Oviedo, Florida 32765

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Where is this switch located at ?
Top Left of the X9303. The Gyro gain can be tied to the F.Mode switch or it can be assigned to another switch, ie: Gear, Rudd D/R, etc.

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04-23-2009 01:45 AM  9 years agoPost 8
DSW

rrApprentice

Oviedo, Florida 32765

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TailGunner wrote:
adjust the gain with endpoints from the gear channel
Made suggested adjustments on gear channel and tail is rock solid.

Thanks to all!

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04-23-2009 03:48 AM  9 years agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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With the X9303 you only have two choices to control your gyro gain...channel 5 (the landing gear channel) or channel 7 (Aux 2).

(Well, I suppose you could also use Aux 3 and Aux4, but that requires an 8 or 9 channel RX).

If you use the Gyro Sense Menu, the gain lead must be plugged into channel 7 (Aux 2).

If you do THAT, you have two choices for gain control: the Flight mode switch (when you select "AUTO" ) or the Rudder D/R switch (if you select RUDD D/R). The flight mode switch allows three different gains, the RUDD D/R switch only two different gains.

The above is only an option if you have a 7 or greater channel receiver.

If you have an AR6100e, your ONLY choice for gyro gain is Channel 5 -- the landing gear channel. As such, you need to go to the DEVICE SEL menu and go to the GEAR setting and choose "ACT" to activate the gear function.

You have only three choices here -- INH, ACT, or GOV.

As for selecting switches to control the gain, you still have to plug the gain lead into channel 5, you still have to ACT the gear channel, but now you make any of the following switches control your gain:

AIL D/R, ELE D/R, RUD D/R, HOLD, GEAR SW. Nothing else.

-----

With your AR6100e, your ONLY choice for gain control is to use channel 5 of your RX, the GEAR CHANNEL.

You must ACTivate the GEAR function in the DEVICE SEL menu. You can leave it so that the GEAR switch controls your gain, or you can assign that switch to one of the 5 choices listed above.

-----

Whatever switch you use to control the GEAR channel, the gain will be controlled by the GEAR end point settings in the TRAVEL ADJ menu.

-----

So. Plug your GY401 gain lead into channel 5 of your AR6100e.
ACT the GEAR function in the DEVICE SEL menu.

The default switch is the GEAR switch. UP towards the top of the TX will select HH mode, DOWN towards the left stick will select NORMAL mode operation. (You can change that by reversing the GEAR channel).

In the TRAVEL ADJ menu, under GEAR -- the first number (goes from +0 to +100) will select gain for HH mode. The second number under GEAR (goes from -0 to -100) selects gain in NORMAL mode.

For numbers 0 to 10, the 401 will not like you. For numbers greater than 90, the 401 will not like you. Calculating the gain:

From your 401's manual:

End Points set to 100, anything greater than 100 is a waste of time.

0 to 10 is no man's land. 91 to 100 is no man's land. The usable range is 10 to 90.

Based on that chart, you can set your gain as low as 11, or as high as 100%.

A setting of "10" yields gain = 11, a setting of "90" yields a gain = 100%, a setting of "45" yields a gain = 50.

In the example, the value of "72" sets the gain to 80.

You can figure out what gain the number will yield by solving the following equation:

(Desired Gain) x 0.9 = End Point Value

In the examples given in the manual:

(80) x 0.9 = 72 and (60) x 0.9 = 54

As you have found, positive numbers give you HH mode (and you need to apply power to the gyro with the switch in this position, for it to work correctly), and negative numbers give you Normal (rate) mode operation.

-----

You can watch the MONITOR function to see what switch is controlling your gyro, and what the settings would be.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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