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Old 12-31-2009, 07:21 PM   #1
Greg1971
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Default HELP! gain adjust on AR6110e

Just finished building my T-Rex 250 SE using an AR6110e and GP750 Gyro with JR DSX9. The only available channel left for the gain wire is the gear channel. If I flick the gear switch the Gyro will go into rate mode ( red LED ) which allowed me to centre the servo and set up the tail. But now how can I adjust the gain? I found this
but it seems a bit complicated. Is there an easier solution?
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Old 12-31-2009, 07:32 PM   #2
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Most people just use the gear switch and adjust the endpoints in the travel adjust menu.
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Old 12-31-2009, 07:41 PM   #3
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Go to the jr 9303 setup video in finless bobs helifreak tech room

I was going to tell you how I do it on my dx7se, now I have had a brain fart. I have to go back to the dx7 videos. I am slow, you have confused me again. I know I set it my gyro goes hh and rate. Sorry man. Try the setup vids.Have a good one
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Old 12-31-2009, 08:18 PM   #4
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Quote:
Originally Posted by wilywampa View Post
Most people just use the gear switch and adjust the endpoints in the travel adjust menu.
OK, i'm assuming that +150 is full avcs and -150 is full hh, so to set a reasonable starting point on the travel adjust end points of the gear channel, say 70%avcs and hh something like +105 -105
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Old 12-31-2009, 08:41 PM   #5
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I don't think that's quite right... There's a scale factor to go between the travel adjust value and true gain, but I don't remember what it is. It's not too important though. 105% is probably going to be too high to start with. I ended up with with 29% on my T-Rex 500 and 40% on my 450 Pro, so starting at 30% would probably be alright.
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Old 01-01-2010, 05:42 AM   #6
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Quote:
Originally Posted by wilywampa View Post
I don't think that's quite right... There's a scale factor to go between the travel adjust value and true gain, but I don't remember what it is. It's not too important though. 105% is probably going to be too high to start with. I ended up with with 29% on my T-Rex 500 and 40% on my 450 Pro, so starting at 30% would probably be alright.
Yep, thats definately not right. I maidened the little beast this arvo at 100% and it was chasing it's tail like a mad dog! Backed off to 30% like you said and it all seems good. Just need to do some fine tuning now.
I watched the Finless video on the 9303. Bob also explains how you can only adjust the end points with a 6 channel reciever
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Old 01-01-2010, 01:51 PM   #7
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The other video that is good is gyro gain 101. it is a video although not marked as one.
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Old 01-01-2010, 02:56 PM   #8
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On the 9303 radios, you CANNOT use the gear channel for gyro gain settings using the GYRO_SENS menu. You CAN, however, use it to control gain via GEAR channel endpoints (ATVS)

The "scale factor" is when using the GYRO_SENS menu. Endpoints is closer to 1:1 so a decent starting point for both HH and rate is 35 then adjust from there. Anything on the + side is HH mode, - is rate.
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Old 01-01-2010, 06:27 PM   #9
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Well, I should have known better. Finless always has the answers! Using travel adjust True gain=(gyro menu - 50) x 1.44. So with the GP750 say 70% gain= +30 on the travel adjust.
Thanks guys and thanks Finless.
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Old 01-01-2010, 08:54 PM   #10
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You can always use the Govenor menu (on electrics) and set it for channel #5 and plug the gyro gain into channel 5 (gear). Works great and allows different gain settings per flight mode.

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Old 01-01-2010, 10:23 PM   #11
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i cant find the video , please post a link
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Old 01-01-2010, 10:44 PM   #12
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http://video.helifreak.com/?subpath=...me=gain101.wmv

that should work let me know if it does not

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Old 01-01-2010, 11:18 PM   #13
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Quote:
Originally Posted by killowatt View Post
i cant find the video , please post a link
Here they are http://helifreak.com/showthread.php?t=95258 the last 3
The x9303 is in the trex 500 build http://www.helifreak.com/showthread....setup+overview
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