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10-25-2009 09:34 PM  8 years agoPost 1
westwindpilot

rrVeteran

Glendale, AZ

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Ok guys, before I get yelled at for not searching, I did. And couldn't find exactly what I needed. And its hard doing this from a blackberry.

anyway, here's my setup.

Trex 700
520 gyro
9256 servo
dx-7

I have my gyro in aux 2.
I have a slow drift to the left. And I mean very slow.
And it has a slow shake.
What gyro settings do you have in your Dx-7? I need a number to start at and I will go from there.

Steve

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10-26-2009 12:35 AM  8 years agoPost 2
Heli 770

rrProfessor

USA.

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Try rotating the gyro 90 degrees, so it will be on a different axis.

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10-26-2009 05:57 AM  8 years agoPost 3
westwindpilot

rrVeteran

Glendale, AZ

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Will do. If that doesn't work what settings you guys using

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10-26-2009 06:12 AM  8 years agoPost 4
Heliguychris

rrKey Veteran

Perth, West Australia

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90 degrees ? Ya sure about that ?

I use channel 5 , and set the endpoint, as the gain value.

Rudder ATV`s at 100.
Rudder DR at 80
ch5 Gain at 54(at the endpoint)

Use the second outermost hole, on the X shaped arm.
Get servo centered.
Set base tail pitch in rate mode ( flick gear switch)
Hit HH and go!

Licensed (CASA) UAV operator certificate holder 1-YFOF5-01 www.helicamaerial.com.au

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10-26-2009 07:43 AM  8 years agoPost 5
westwindpilot

rrVeteran

Glendale, AZ

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I did everything you said. Except its thru the aux 2 channel.

I'm flying it tomorrow. Will c how she does.

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10-28-2009 11:22 PM  8 years agoPost 6
ckd

rrApprentice

Saugus CA

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for some reason on my trex 500 I also got a really slow drift. Made sure it would hold in rate mode and then switched to HH and all is good now.

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10-29-2009 01:03 AM  8 years agoPost 7
ErichF

rrElite Veteran

Sutton, NH

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The GY520 can be a bit sensitive to airframe resonance. This is why the suggestion to rotate 90°.

Also, using a different density foam tape might be called for. I my Caliber 90, with smoothness second only to an electric Caliber 90, I had some drift. I changed the mounting tape to two layers of 3M VHB, separated by the included shield plate.

Secondly, make sure your electrical lead to the gyro is free, but not overly slack. The lead, if left to hang on it's own to much, can resonate and cause issues. The gyro is so small and light in inertia, even the wire attached to it can cause it to move around.

Erich

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