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HelicopterRadio - JR DMSS › JR 9303
12-17-2011 12:10 PM  5 years agoPost 1
bartles

rrNovice

Ruston, Louisiana

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I am dusting off my equipment from quiting about 6 years ago. I have up dated my 9303 with the 2.4 module. What I can not remember how to fix is the gyro..I get the light on the 401 to stay on (AVCS) but the servo does not react when the heli is move...nothing at the servo.

I was flying when I put everything up.......I must have done something to the transmitter when I reprogramed it.....but what?

Would appreciate a check list of possibilities...

bartles

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12-17-2011 01:09 PM  5 years agoPost 2
Pistol Pete

rrProfessor

Seffner, FL

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Verify [GYRO SENS] is enabled. Start around 50% or greater for HH.

~~Enjoying the hobby one flight at a time~~

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12-17-2011 01:24 PM  5 years agoPost 3
z11355

rrMaster

New England

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plug the tail servo into another 'normal' channel and see if it moves.

depending on the servo and where it was mounted on the machine, it's possible that over the years, oil has seeped into the servo and swollen the paper separator in the motor, thus killing the servo. it's happened to me several times w/ tail/boom mounted servos.

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12-18-2011 03:01 PM  5 years agoPost 4
bartles

rrNovice

Ruston, Louisiana

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JR9303

The current setting in Gyro Sens is:

Auto

POS:0 50%
POS:1 50%
POS:2 50%

Is this setting correct..
[GYRO SENS] > 0

bartles

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12-19-2011 02:00 PM  5 years agoPost 5
Pistol Pete

rrProfessor

Seffner, FL

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MANUAL screen is the "easiest" to set up and should look like this

[GYRO SENS] 0

RUDD D/R

Pos 0 50%
Pos 1 50%

You can switch between these two settings via the RUDDER dual rate switch manually, thus the POS 0 and 1 respectively.

As per the example above, nothing noticeable will happen since they are both set to 50%.

You need to find the percentage that will hold the tail in place without any side to side wagging (hunting).

This is done by INCREASING the GAIN until it starts hunting and then DECREASE the GAIN until it stops hunting.

When done you have found the percentage for POSITION 0 which would be just for hovering around. Notice everything was done just for POS 0.

Now for POS 1, insert the "new" gain percentage from POS 0 and do fast forward flights (FFF). IF it hunts, DECREASE the GAIN until you find the magic number again.

Now you can manually switch between POS 0 (hovering) and POS 1 (FFF)via the rudder dual rate switch.

http://www.jrradios.com/ProdInfo/Fi...9251-manual.pdf

page 45 (or H30) in the manual.

Best of luck.

EDITED: Make sure that eveything reads 0% in the [REVO.MIX] menu. It's disabled by "zero" values only.

~~Enjoying the hobby one flight at a time~~

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12-19-2011 02:12 PM  5 years agoPost 6
BarracudaHockey

rrMaster

Jacksonville FL

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My guess is the servo, if the light is on its in heading hold and should react to movement regardless of the gain.

Andy
AMA 77227
http://www.jaxrc.com

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12-25-2011 06:25 PM  5 years agoPost 7
bartles

rrNovice

Ruston, Louisiana

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Gyro

I will try these recommendations asap.........and thanks everyone for pitching in to assist me,

Mark

bartles

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12-25-2011 11:59 PM  5 years agoPost 8
dkshema

rrMaster

Cedar Rapids, IA

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Auto

POS:0 50%
POS:1 50%
POS:2 50%
In Auto, the gain will be controlled by the Flight Mode Switch unless you have chosen to use the RUDD D/R switch (in which case, you'd see "RUDD D/R" displayed in the Gyro Sense menu). Since you see "Auto", gain is controlled by the Flight Mode Switch through Channel 7 of your receiver.

Auto - the gyro gain is controlled by the Flight Mode Switch and the GAIN lead MUST be plugged into channel 7 of your RX (AUX 2).

AT 50% on the 9303 you have essentially disabled the gyro, as it's gain is ZERO and its operating mode is indeterminate. The gyro won't correct the tail servo when you move the nose of the heli.

With the 401 controlled by the Gyro Sense menu, gain numbers greater than 50 select HH mode. Numbers less than 50 select Normal/Rate mode. Numbers close to 50% select nearly zero gain, the gyro won't do much for you here whether it's operating in normal or HH mode.

The picture below is the GYRO SENSE setting menu, and it is set for AUTO (gyro gain controlled by Channel 7/Aux 2 and selected by the Flight Mode Switch).

Those numbers located in the center of the screen in the picture above, are all set to 50% (the default setting, and essentially zero gain and No Man's Land for the 401).

The values at the right of the screen allow you to associate the gain set by the three "POS" values with the position of the Flight Mode Switch.

NORMAL flight mode is with the flight mode switch positioned toward the rear of the TX. ST-1 is the flight mode when the switch is centered. ST-2 is the flight mode when the switch it forward, toward the front of the TX. HOLD, when enabled, selects the value for gyro gain in Throttle hold mode when active.

In the picture, the values at the right show POS 0 gain selected for Normal, ST-1 and ST-2 flight modes. If you have Throttle Hold enabled, you'll see a fourth entry, "Hold" in that list and it will be associated with POS 0, POS 1 or POS 2 -- your choice.

Assume that you set the middle set of numbers as follows:

POS 0: 25
POS 1: 75
POS 2: 60

And on the right-hand set of numbers, you set:

Norm: POS 2
ST-1: POS 0
ST-2: POS 1

The picture below will apply when using the GYRO SENSE menu:

With the flight mode switch in NORMAL position (toward the rear of the TX) the gain number of 60 associated with POS 2 would be applied to your gyro. You would be in heading hold with a gain somewhere close to 20%.

With the flight mode switch in its center position for ST-1 mode, the gain associated with your gyro would be the value for POS 0, or 25. This would put your gyro in Normal/Rate mode, with a gain of 50%.

With the flight mode switch forward, towards the front of the TX to select ST-2 mode, the value associated with POS 1 ("75" ) would be associated with the gyro gain. This would put your gyro in HH mode with a gain of about 50%.

The number you see displayed just to the right of the words "GYRO SENSE" simply tells you which of the three POS values are associated with the flight mode switch position.

You can set these values however you wish, and then switch over to your 9303's monitor screen and see how the gyro gain channel (AUX2) responds to the flight mode switch and the values you chose for this menu.

-----

If you're using a six channel receiver, you MUST plug the gyro gain lead into Channel 5 of the RX, enable the GEAR switch in your TX Device Select menu, and use the GEAR channel endpoints to set gain. You CANNOT USE the GYRO SENSE menu if you have to run the gyro gain out of channel 5 of your receiver.

This picture applies when using the GEAR switch:

If you use the GEAR switch for gyro gain control along with Channel 5, you'll have one gear switch position that selects HH mode and one position that selects Normal/rate mode operation.

Gain for each switch position is set by the GEAR channel endpoint settings, and you'll have one gain in HH mode, one gain in Normal mode, depending upon the position of the GEAR switch.

Note that the endpoint settings must be in the range of 10 to 90% for each endpoint setting in the GEAR menu. Numbers between 0 and 10, or greater than 90 are No Man's Land for the 401, its mode will be indeterminate.

Usable gain numbers go from 11 to 90 in the endpoint menu, and as can be seen in the picture, the number in the endpoint menu isn't necessarily the gain divided by 2 (a setting of 45 gets you 50% gain, a setting of 90 gets you 100% gain).

-----

Even if you have the gain dialed down to zero, you should still have rudder control as long as the rudder input on the 401 is plugged into the RX rudder port.

You will HAVE to set up the 401 for it to initialize in HH mode (red LED must come on solid after the gyro finishes its power-up sequence. If the light isn't ON solid, then you have initialized in the wrong mode and the gyro may or may not work very well.

In any event, if you have everything plugged in correctly you should still be able to control the servo from the transmitter using the rudder stick.

-----

The best way to actually SET your gain is to fly the heli in fast forward flight. Increase gyro gain until the tail of the heli begins to oscillate, then back the setting down until that oscillation in fast forward flight goes away.

Enjoy that 9303.

-----
Dave

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

Team Heliproz

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01-01-2012 01:39 AM  5 years agoPost 9
bartles

rrNovice

Ruston, Louisiana

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Update

I have the gyro up and running, many thanks to all who contributed with my post. I really appreciate the time you all have spend "retraining" me with the radio!!

Sometimes the aging process gets in the way of good clean fun as well!!!

bartles

bartles

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