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Old 04-05-2011, 07:01 AM   #1
CrimzonRider
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Default Now I have a servo problem...

My setup is as follows:
Grayson Hobby VE MicroJet V3 200watt w/ a 6x4(recommended)
GH 20amp ESC
GH Parkflyer 9g Servos 4x's
2200 11.1v 20c batt

Built my first "scratcher" plane 25" SU-26 with the above setup. The battery is tad too large, but just using it to center the servos and get info from the watt meter, til I get a smaller battery.

first time hookup: WOT got 206watts at 19.4amps (only for a sec or two)
2nd time hookup: "ditto", but with all servos hooked up....Good!

3rd time: rx blinked once after rudder servo arm moved about 45degrees, then nothing. no rx light, nothing, chk batt volt...good

4th time with another battery: same thing, rx blinked once then servo armed moved another 45deg. in the same direction, basically servo arm started to make a circle everytime I connected power, I dont have another ESC or (rx(ar500) no probs up til now.)
Just bought setup today. What gives? Nothings hot. No binding going on. From arm to horn about 9in. everything is straight and inline. Swap rudder servo to aileron on rx, and that same servo does the same thing, is a brand new servo toast? Again First Build Here.

Thanks
have a good one
CR
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Old 04-05-2011, 07:07 AM   #2
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Originally Posted by CrimzonRider View Post
My setup is as follows:
Grayson Hobby VE MicroJet V3 200watt w/ a 6x4(recommended)
GH 20amp ESC
GH Parkflyer 9g Servos 4x's
2200 11.1v 20c batt

Built my first "scratcher" plane 25" SU-26 with the above setup. The battery is tad too large, but just using it to center the servos and get info from the watt meter, til I get a smaller battery.

first time hookup: WOT got 206watts at 19.4amps (only for a sec or two)
2nd time hookup: "ditto", but with all servos hooked up....Good!

3rd time: rx blinked once after rudder servo arm moved about 45degrees, then nothing. no rx light, nothing, chk batt volt...good

4th time with another battery: same thing, rx blinked once then servo armed moved another 45deg. in the same direction, basically servo arm started to make a circle everytime I connected power, I dont have another ESC or (rx(ar500) no probs up til now.)
Just bought setup today. What gives? Nothings hot. No binding going on. From arm to horn about 9in. everything is straight and inline. Swap rudder servo to aileron on rx, and that same servo does the same thing, is a brand new servo toast? Again First Build Here.

Thanks
have a good one
CR
Did you check the DC voltage on the throttle servo connector at the receiver? Should be 5 volts DC on the red and black wires. If it's not, try a 4 cell nicad battery pack for receiver power with just the receiver and servos, no ESC plugged in, and see what you get.

If that looks good, check this out:
Checking servo signals with a digital multimeter:
http://www.wattflyer.com/forums/showthread.php?t=54123

DennyV
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Old 04-05-2011, 07:08 AM   #3
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Those cheep servos are cheap for a reason They tend to have a higher failure rate than name brand servos, so dont be too surprised.

On the plus side, Greyson has a great rep so Im sure they will take care of you.

I think I need a signature.
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Old 04-05-2011, 07:23 AM   #4
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Yeah figured as much....cheeep, is always the answer, though I have had pretty good luck with them, bought 11 of them over the last few mths and this is the first fail... owell thx

Thanks for the other suggestion, I dont have a nicad battery just to power the rx to chk voltage, the only other battery I have is a Nickel Metal hydride 2300mah 4.8v. with no connector, if I can use that I will solder up a new connection to rx and check it in the morning..

Thanks again for the quick response guys appreciate it
have a good one
cr
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Old 04-05-2011, 07:25 AM   #5
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Originally Posted by CrimzonRider View Post
Yeah figured as much....cheeep, is always the answer, though I have had pretty good luck with them, bought 11 of them over the last few mths and this is the first fail... owell thx

Thanks for the other suggestion, I dont have a nicad battery just to power the rx to chk voltage, the only other battery I have is a Nickel Metal hydride 2300mah 4.8v. with no connector, if I can use that I will solder up a new connection to rx and check it in the morning..

Thanks again for the quick response guys appreciate it
have a good one
cr
That 4.8 volts Nih battery will work just fine. Just be danged careful of polarity!!! (Its milliampere hour rating doesn't matter, just the voltage)

Good luck!

DennyV
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Old 04-05-2011, 07:30 AM   #6
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will do

thanks dennis
have a good one
cr
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