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HelicopterRadio - Servo - Gyro - Gov - Batt › GP750 and Turnigy DS480 problem
06-02-2010 12:22 AM  7 years agoPost 1
californiaflyer

rrApprentice

Temecula, California - USA

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I have a Align GP750 gyro and Turnigy DS480 tail servo bought from HK mounted on a T-rex 450. The problem I have is, after I power up the heli there is no servo response at all. If I disconnect the servo from the gyro and then plug it back in, servo gets powered up and it works. Anyone knows what causes this problem? I have tried the gyro with other servos I have (digital and analog) and it works fine with those, so it's this specific servo (Turnigy DS480)that wont work unless unplugged and re-plugged.

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06-02-2010 05:16 AM  7 years agoPost 2
jschenck

rrProfessor

La Vista, NE.

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Is the GP750 setup for 1520µs? If it's setup for 760µs perhaps this is causing the problem.

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06-02-2010 06:17 AM  7 years agoPost 3
californiaflyer

rrApprentice

Temecula, California - USA

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GP750 and Turnigy DS480 problem

Yes, it is setup for 1520µs. Thanks for the reply. The servo is brand new, the gyro I bought used but "never crashed". Can it be that the gyro is bad? Anybody else has any suggestions?

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06-02-2010 04:25 PM  7 years agoPost 4
CoronaL

rrKey Veteran

Winnebago IL

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servo or lead is plugged in backwards. Had it happen before. Pay attention to polarity of leads

Randy!!! I am the liquor

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06-02-2010 09:37 PM  7 years agoPost 5
californiaflyer

rrApprentice

Temecula, California - USA

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Found the answer...(same issue for GP750)

This servo does not work with the Futaba GY520 gyro.

When first turned on, as part of its initialisation the GY520 attempts to move the servo to the left and then the right limit. The DS480 servo interprets this as a bad signal and stops responding.

The only way to get this servo to work, is to unplug it and then plug it back in after the gyro has initialised.

There should be a warning about this incompatibility in the product description.

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HelicopterRadio - Servo - Gyro - Gov - Batt › GP750 and Turnigy DS480 problem
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