401b doesnt move the servo

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Hello
Just got my heli kit with the electronics.
All smooth besides gyro. Id doesnt move a servo.
The servo is MKS S311 Digital Micro Servo 8.26g http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6813&Product_Name=MKS_S311_Digital_Micro_Servo_8.26g
And i alsp tryed analog HXT 900 with same result.
The gyro light indicate all fine. Initiate at the begining and then double blink on stick movement, but the servo not moving at all.
Servo directlty in rx works fine. Rx is 6ch futaba 2.4gg.
Im already tested the wires and look at soldering - looks like it's ok.
Any help?
Tnx...

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flyawayfromhere Members Profile Send Private Message Find Members Posts Add to Buddy List Gold (RU) USERID: 37018 Newbie Joined: 20/Jul/2010 Online Status: Offline Posts: 2	Quote Reply Topic: 401b doesnt move the servo Posted: 30/Aug/2010 at 8:07pm
	Hello Just got my heli kit with the electronics. All smooth besides gyro. Id doesnt move a servo. The servo is MKS S311 Digital Micro Servo 8.26g http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6813&Product_Name=MKS_S311_Digital_Micro_Servo_8.26g And i alsp tryed analog HXT 900 with same result. The gyro light indicate all fine. Initiate at the begining and then double blink on stick movement, but the servo not moving at all. Servo directlty in rx works fine. Rx is 6ch futaba 2.4gg. Im already tested the wires and look at soldering - looks like it's ok. Any help? Tnx...

Sooty Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (NZ) USERID: 173750 Hobbyking Addict Joined: 10/Mar/2009 Location: Christchurch NZ Online Status: Offline Posts: 2586	Quote Reply Posted: 02/Sep/2010 at 1:35pm
	Sounds like you have a crook one - I have three and no problems so far. If your servo works direct from RX then problemo is with gyro. The HXT900 works fine with that gyro for me.

flyawayfromhere Members Profile Send Private Message Find Members Posts Add to Buddy List Gold (RU) USERID: 37018 Newbie Joined: 20/Jul/2010 Online Status: Offline Posts: 2	Quote Reply Posted: 02/Sep/2010 at 2:08pm
	I just found a solution. Wires was damn crossed!! They just soldering output wires crossed ( signal was on place the groud wire and vise versa) It's damn bullpucky ... Grate work HK i love u ...

kosmas Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (GR) USERID: 327086 Newbie Joined: 07/Jul/2010 Online Status: Offline Posts: 9	Quote Reply Posted: 22/Sep/2010 at 9:14pm
	If you consider that cost only 13$ ...yes HK done Great Work again i have four helis flying with this Gyro and no problem so far .Great Gyro and perform as good as my Futaba 401 with S9254 combo . Don't forget to done this modification : http://sergio.salvi.ca/2009/10/18/mystery-gyro-g401b-modifications/

kstmark Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (GR) USERID: 69866 HobbyKing aficionado Joined: 01/Mar/2009 Location: Greece Crete Online Status: Offline Posts: 576	Quote Reply Posted: 22/Sep/2010 at 9:43pm
	kosma wellcome to our forum. It's fine meeting someone from our place. The modification for 401b is well known but it's perfect to have a link to this. I must mention that not all of 401b work properly. I have one that the limits don't work at all and an other one that it make corrections only to the one side!!! Even with this issues 401b is the best choise for middle 3d flights

kosmas Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (GR) USERID: 327086 Newbie Joined: 07/Jul/2010 Online Status: Offline Posts: 9	Quote Reply Posted: 23/Sep/2010 at 2:44pm
	kstmark ,is nice for me too. i have 4 or 5 HK401B gyros for my helis (even HK500 GT) and so far all gyros works very good,with no issues . off course with the modification ,and i can tell that the hot glue on the top of the cover at the four corners is a must ,this actually keep the gyro circuit board steady in place.