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11-27-2007 03:58 PM  9 years agoPost 1
Helijockey

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150 miles from somewhere

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I'm setting up a friend's heli with a GY401 and futaba 9C. The gyro was fine in HH mode but as soon as I adjusted the gain during setup, it suddenly went out of HH. Now I just can't seem to get it back in HH As mentioned I didn't change the radio settings etc only centered the servo arm and was in the process of adjusting the gain.

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11-27-2007 05:52 PM  9 years agoPost 2
Dr.Don

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Cedar Park, TX -- USA

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need more info. Are you adjusting gain remotely from transmitter? What transmitter?

Dr.Don

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11-27-2007 05:56 PM  9 years agoPost 3
Lamar Cooley

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Houma,La.,U.S.A.

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401 HH problem

Hey Helijocky
What up?
When you say you only "centered" the servo arm. Did you do this with
radio sub-trim or trim? If so, that may have whacked out yoursettings.
The gain will be plus or minus 0 to 50 for "normal" flight mode setting and plus or minus 51 to 100 for "heading hold" flight mode setting. The plus or minus values depend on your switch position and servo direction( normal or reversed). The test is, in normal mode the tail blades will immediately return to their "CENTERED" position. In heading hold when you move the stick left or right the blades will remain in that position. Also when setting up the tail, in your radio, you want the trim and sub-trim value to be at "0", you want your "atv" or "end points set to 100 left and right. Also you want the tail rotor blades at center position(straight). The gyro is then set useing it's endpoint adjustment to prevent the slider from binding at the end of total throw both ways.Check the gyro's end point adjustment "pot" and set this as close to center of dial as possible before centering your tail blades. Try to acheive equal throw both ways from center. A few weeks ago I setup a buddy's Trex 450 with his 9C and 401. If I recall correctly you also have to ASSAIGNE a switch to be your toggle from "normal" to "heading hold" operation and back. Also the 401 has to be in "normal" mode when the heli is switched on so that the gyro can read and register the "normal" centered position.
Please, if I have made some errors, correct me.
By the way what heli are you setting up?
Also please understand, I am trying to do this from memory and " the old gray cells ain't what they used to be"
Hope this is of some small help
Regards


Here when wanted.
There when needed.
Everywhere when looked for.

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11-27-2007 06:10 PM  9 years agoPost 4
MichaelP

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Northumberland UK

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Re-check your settings.

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11-27-2007 06:26 PM  9 years agoPost 5
Zaneman007

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Texas - USA

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I just want to throw in a couple of items;

The futaba radio in the gyro setting will have an "A" or an "N" after the number. The "A" is for heading hold, and the "N" is for normal(rate mode).

As previously stated there should be a toggle switch to change the gain. Normally one is set to HH and the other is set to rate mode? In other words, you should be able to toggle between rate and heading hold.

If you initialized it in rate mode, and not heading hold. You may have to reset the gyro? Try turning of the RX the turning it back on or flipping the gyro switch like three times, quickly.

Also, you state that you didn't change anything in the radio, but you also state that, "as soon as I adjusted the gain." This would imply that you were in the radio making changes, yes?

It is hard to say but, I would think that you either changed the "a" to an "n" or you hit the gyro switch, slapping it in rate mode? Because, mechanically centering the servo arm will not do what you said. That is assuming that you did this mechanically and not in the radio?

And what is the red led on the top of the 401 doing? When you turn on the Rx does it blink, slow, fast, not at all? And does it stay on or does it just keep blinking?

Old Guys Rule!

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11-27-2007 07:10 PM  9 years agoPost 6
Helijockey

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150 miles from somewhere

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Guys since I'm a JR user, I set up the gyro using the method described for the GY401 and 9C in raptortechnique. Zaneman007 the LED keeps blinking. Lamar Cooley it's a raptor 30. I'll recheck the settings again and get back to u guys.

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11-27-2007 07:45 PM  9 years agoPost 7
BarracudaHockey

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Jacksonville FL

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When you say you only "centered" the servo arm. Did you do this with
radio sub-trim or trim? If so, that may have whacked out yoursettings.
The gain will be plus or minus 0 to 50 for "normal" flight mode setting and plus or minus 51 to 100 for "heading hold" flight mode setting. The plus or minus values depend on your switch position and servo direction( normal or reversed).
Thats incorrect.
Also the 401 has to be in "normal" mode when the heli is switched on so that the gyro can read and register the "normal" centered position.
Please, if I have made some errors, correct me.
Thats incorrect too.

Set the end points on channel 5 to 100/100
In the GYRO SENS menu make sure that the mix is ACT and not INH and the mode is set to GY not STD

Pick your favorite switch although personally I set it to COND so you can set a gain for each flight condition.

Lets say you pick switch A
Rate UP will set the gain for the up position of the switch. Rate DN will set the gain for the down position, if you pick a 3 position switch it will say UP CTR and DN allowing a gain and mode for all 3.

Set UP to AVC50 and DN to NOR 50 and test fly it. Make sure you initialize the gyro in Heading Hold mode.

If you pick COND you can set a gain for each flight mode Nor, I1, I2, I3, and Hold.

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

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11-27-2007 08:21 PM  9 years agoPost 8
Helijockey

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150 miles from somewhere

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Thanks BarracudaHockey I'll recheck again.

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11-27-2007 08:33 PM  9 years agoPost 9
Lamar Cooley

rrApprentice

Houma,La.,U.S.A.

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401 hh problem

Thanks B.H.
As I said I could not exactly remember the 9c programing features.
Glad to know when I freely admit I could be wrong that the "all knowing eye" has my back.
Thanks again. One day I may break down and pick up a 9C FM. If'n the
2.4 ghz doesn't make them obsolete.
Regards


Here when wanted.
There when needed.
Everywhere when looked for.

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11-28-2007 05:49 AM  9 years agoPost 10
Helijockey

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150 miles from somewhere

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Activated the mix in the Gyro sens menu and all is ok Thanks BarracudaHockey. Also thank u guys for ur posts.

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11-28-2007 01:48 PM  9 years agoPost 11
BarracudaHockey

rrMaster

Jacksonville FL

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Lamar, no problem, though I'm certainly not "all knowing" the nice thing about the gyro menu on the 9c is its "what you see is what you get"

That bit about over 50 is heading hold, under 50 is rate mode is how JR does it.

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

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