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For what surface? may be ok for aileron, depends on many things, best bet is to find a plane that hk sells as a kit that is similar length, wingspan, cord, wing type and weight and then see what they are using or suggesting for servos in it.
A guy on my field uses the 6v version and he said that is good, I use this this is good also but we didnt compare the two. If you are planning to use 5v then use this.
I've been using a Hyperion servo on the tail of my HK250 but the mounting on the case broke so I changed to the HKSCMS-9 with a AVCS mini mems gyro on 1520, 250 setting I have now burnt out two servo's with and have not used a full battery charge. I'm using a Hobbywing Pentum 5v 2a esc does any one have any idea as to what I am doing wrong.
There are two schools of thought on servos. **-1. buy cheap and just replace them when they fail. **-2 buy expensive and they'll last forever.******
I just installed 4 of these on mt 800mm racer series plane. They are quiet fast and don't twitch like some do. I haven't flown/crashed it yet so I guess that will be the real test. I did buy two extra though just in case.
Yeah me too! I try to buy low to mid cost servos. though I've only strip-out 3 servos do to crashes. I best servos I ever bought burned up mid flight on the maiden of my first (and only) scratch build. (I set the servo frequency on my stabilizer too high.) I would have rather learned that lesson on a cheap EPO. I'll build again ...some day.
One more school of thought, buy cheap metal gear servos and you have the best of both worlds. Although if you are going for supreme light weight, these servos are acceptable.
Metal gear servos are good for large/high toque control and rarely strip on a rough landing. Cheap MG servos could still be twitchy, have centering problems, or a short 'electrical' life.
By the way, I have increased the friction on the ailerons and this has improved the situation. I added some of the fuzzy/soft side of velcro to the side of the plane between the fuse and the edge of the aileron. The added friction is helping the servos to find their centres. Looks ugly, but it seems to help. So until there are better ideas I guess I have an ugly plane *-).
would this be the best for a blade 400? any other reccomendations for under $15, must be under $15 and i think because the stock servo is 23mm long i need oned thats that or less
Yes. The JR style plug is a Futaba plug that is non-keyed. In other words, yes, just make sure the signal wire is in the right spot. If you get it wrong you just have to turn it around though, it wont hurt the servo.
Hello!
I set gyro 250Hz/1520uS. I use GA-250 gyro in HK 450GTpro with tail servo HKSCM9-5, and in low speed rotor it work good, but in rotor akcel/high speed vibrate tail in 3-5Hz/10CM on tail.? I dont have picture and manual of mounting GA-250 on 450 heli and 250 heli (best distance of rotor axis and best position mounting? )Thanks.
turn down the gain on your gyro. Usually that is the extra signal connected to your receiver. One way is heading hold, the other is rate-compensation only. Oscillation can occur in both modes when the gyro is correcting too much and overshoots. Usually you also have a potmeter on your gyro that can increase the sample time, which is useful if your servo is not too quick. Also, be aware that this is a very cheap servo, you should not expect high end specs from it...
Maybe there are other thing cause more vibrations. Check all connections and screws. Also check the distance of the tail to main drive.
Maybe the cable from gyro to servo/TX vibrates i would advise you to check that as well
I purchased four of these servos for my HK 450 V2 heli. I am having an issue that seems to be the problem with each of them. When I apply hook the battery up to my speed controller, the servos keep "glitching" and make small jerks in either direction.
I am using the Turnigy 9X v2 radio and 8 channel receiver that comes with it. I am using the Turnigy Trust 45 speed controller which states a BEC voltage of 5.5 volts. I am using a 3 cell LiPo. The issue is present both when the transmitter is turned on and when it is off. I can't hardly imagine that a half volt on the high side can cause this issue.
Someone please help!
Thanks,
Superjon
Try to use receiver battery to test if it's not a problem with your ESC.
Disconnect ESC from the receiver, connect 5V supply to the receiver and you'll see if it's with your receiver.
Try also checking the servos with a servo tester but I think it's without problems.
I had a HobbyKing 25 amp speed controller as well that I tried as per your advice. The rated voltage for the BEC on this speed controller is 5 volts. Needless to say, these servos DO NOT like anything over 5 volts. The 5.5 volts out of the Turnigy Trust 45 amp ESC drove these things crazy. I would be willing to say they would probably have burned up had I let them run at that voltage for any extended period of time. Now, I need another speed controller because the 25 amp model is not strong enough to handle the loads for my 450 V2 heli according to my research. ...three more weeks! Thanks for the advice!!!
What setting did you use for this servo on the GA250, Hz wise. It's not posted on the specifications and I hope they will because it's hard to set the gyro up without that info I would think.
Weighs 9.9g with wire and plug. The arms are the same as on the HXT900 servos, convenient. Tested one to destruction by manually twisting the servo arm, it did not give a milimeter before the gears stripped. The two gears that stripped are compatible with HXT900 replacement gears, although the ratio isn't exactly the same. You have to change both of the two last gears. It now works perfectly again.
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FinnSpeed
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Measurements:
- weight 9.85g without horn and screw.
- dead band 2us.
This is a digital version of the HK15178 and seems to come from the same factory as the HXT900. I have two and both work smooth and well, center nicely. Price/quality is awesome especially if the servo proves to be reliable.
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User193
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Habe 10 Stk. Servospiel ist leider sehr groß, auch wenn Strom auf dem Servo ist. Soll aber lösbar sein mit Getriebetausch von HXT900, werde das mal Probieren.
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Noobie
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I only give it 3 stars because I only got one set of the servo arms so will have to wait for my other set.
So for now, here are the pictures...change the dot to a www.link a Video...
youtubedotcom/watch?v=VEOjAvwpsIo
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