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HomeRC & PowerAircraftHelicopterRadio - Hitec Aurora › Bad servo? Hitec 605BB
07-22-2002 02:22 AM  16 years agoPost 1
gforce

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Fort Mill, SC

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Just bought 4 Hitec 605BB's for my next bird, and when I plugged them into the reciever one of them just hunts randomly through it's range of movement. Sometimes it stops, some times it starts in one direction then jumps back. Sometimes it moves 1/2 the way through it's movement and just stops. No pattern to it's moving at all. I know the reciever is working fine because if I plug the other servo's into the channel they all center perfectly and work perfectly. And if I plug this bad servo into other channels on the reciever, it does the same problem. Have you ever seen something like this.

I purchased them froom Zoom's hobbies, I have e-mailed them to see if I can exchange it. I will see what they say.

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07-24-2002 12:18 AM  16 years agoPost 2
mike lewis

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northeastern AZ

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BAD HS 605 BB's
Your post has been up for a few days and no one wants to tell you. You could have made a better selection for your servos. Hitec has a problem with NO cross that out, the people who buy the 605's have the problem try a mid to long arm on the servo it woln't return to center the same place twice. CK it out!

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07-24-2002 12:31 AM  16 years agoPost 3
Twobeers

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Toronto, Canada

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Now before I condem anything I will ask you one question. Is the transmitter turned on when you do this test. Many servo's will twitch when you only turn the reciever on without turning on the transmitter. Ask yourself this simple question. How can the servo center if it is not recieving a centering pulse from the transmitter? We watched this fellow tear his airplane apart at our club several times trying to hunt down an alleged glitch before any of us realized that he hadn't turned on his transmitter. It is not uncommon for servo's to twitch and travel every which way when only the reciever is turned on with out the transmitter. That is why the instructions tell you to turn on the transmitter first.
If the transmitter is turned on, then yes you got a sour servo.

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07-24-2002 12:55 AM  16 years agoPost 4
gforce

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Fort Mill, SC

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Transmitter is on. The other servo's center perfectly. Just got a bad one. Zoom's is swapping it out for me.

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07-25-2002 02:04 PM  16 years agoPost 5
JasonF

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Northern VA

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You might consider swapping all four of them out for something with a better reliability record, like the Futaba 9202 for instance.

Jason

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07-25-2002 05:37 PM  16 years agoPost 6
NEM3

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New Lenox, Il

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From what I remember Hitec has fixed the wiring problem with the 605's. And if you still not comfortable with them then take of the casing and put some silicon on the wires were the exit. This will hold them securely.

I think that you might have just gotten a bad one. Return it to your LHS and they should replace it with a new one.

Go to the part about "Gooping" the servo wires.
How to "Goop" Hitec Servos

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07-30-2002 08:27 PM  16 years agoPost 7
gforce

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Fort Mill, SC

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Well you told me so. The other 3 servos showed problem's also. The wires were not loose, but where they were folded up for shipping, they turned brown when I hooked them up. I am not using anything unusual here, Futaba system, 4.8v. 1700mah battery. With the one bad servo, and the wires turning brown where they had been folded tightly, (I asume this is from high resistance in the whire causing it to get hot) I got the OK from Zooms to send them back for exchange on some 9202's.

I really wish these servo's would have worked for me. I liked the price, speed, and torque they had. Now, because of the bad taste I have in my mouth, it would take a free good working set of digital servo's from Hitec to get me to buy them again. Oh well, back to Futaba I go.

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07-30-2002 08:48 PM  16 years agoPost 8
NEM3

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New Lenox, Il

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Sorry to hear about your bad luck with them Glenn. I think you are right about the "browning" of the wires also. Maybe not so much them being folded up but probably overcurrent.

Hope you have good luck with your overated Futaba's

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07-30-2002 11:08 PM  16 years agoPost 9
fritzthecat

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Virginia Beach, VA

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When you get the 9202 servos you will see that their quality is heads above the Hitec 605s. I use the HS6xx series on the rudder of my trainer plank and in my sailboat. I would not trust them anywhere else, especially in a heli.

Fritz


'Send Money, Women and Guns!'

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07-30-2002 11:13 PM  16 years agoPost 10
gforce

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Fort Mill, SC

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Ya, I know the quality is better. I have used Futaba for years, and I just wanted to try another brand out. I should have known at $26 a pop, I was asking for trouble. Just glad to get rid of the trouble before it became big trouble (crash). Or should I say (cash) out of my pocket.

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07-30-2002 11:29 PM  16 years agoPost 11
Dazzler

rrElite Veteran

Ohio

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I have heard of 605BB's having problems, but I have a total of 8 in 2 1/4 scale planes, and have never had any problems whatsoever, they have been great servo's. My LHS sells a bunch of them, and they said they have never had one customer mention a problem, thats weird, maybe they just didnt want to tell me, I dont know. As a matter of fact after being in this hobby for 12 years using various manufacturers servo's I have never had a problem with one servo, the only servo that broke on me was when I was racing gas cars, and a guy T boned me right where my throttle servo was, and stripped 1 gear in it, I repaired and it is being used now in one of my planes for the throttle, it is a Hitec 300BB.

But if you are having problems with your Hitecs you may as well switch because you will never feel comfortable about those servo's again. And you can always count on futaba servos, being dependable. Daz...

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08-02-2002 03:33 PM  16 years agoPost 12
JJsaratogaNY

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Centreville, Virginia

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hitec's aren't that bad.
hitec servo's aren't that bad, they are just inexpensive, and thus made cheaply. I use some in a 1/4 scale cap, and an ergo60 sport, and they fly fine. True that are not the same quality that futaba's are, but don't be scared away from them. lots of people use them with absolute success. I think a better analogy would be that while futaba servo's may a perfect "10", hitecs are only an "8". yeah they center very well, but truthfully, unless your a competition level flyer, chances are you won't even notice. they are good for beginner and intermediates.
just my .02 cents

uuuggghh! I'm getting sucked backed in again...

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08-02-2002 04:20 PM  16 years agoPost 13
blazen

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California

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I have personally used hitec 605’s for quite sometime. I’ve yet to experience any failures with this servo. I tend to believe that the types of failures people are experiencing with the servo are more related to improper mounting and high frequency vibration. I’ve all too often inspected helicopters being entered into contests and have seen even professionals mount servo’s improperly I’ve seen servo’s mounted without Rubber grommets. I’ve seen servo’s mounted with grommets but without the brass I have even seen servo’s mounted with the servo case actually in contact with part of the Helicopter. And worse yet even using servo tape ! If I personally see any of the aforementioned mounting techniques used I will personally ground the helicopter and not allow that helicopter to enter the contest or allow the pilot to fly it until all the servo are replaced and properly mounted. I make them replace the servos because I have know idea how much damage the servo’s have incurred.

The type of vibration that can kill Electronics Is very difficult to spot. Fuel foaming Is not always a good indicator in fact fuel foaming can sometimes be hard to see especially in the falcon As the tank is very opaque ..

If you are suffering from multiple servo Failures I would tend to believe that An underlying problem exists other than poor quality Servo’s


73’s
Blazen

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08-02-2002 08:38 PM  16 years agoPost 14
gkforce

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on vacation

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This is gforce, using my relatives compupter while on vacation, I will be gkforce for a week.

I would not say that I had multiple survo failures. Just one servo that came DOA, and three others (acutally all 4 of them did this) that had cause for reason to believe that they could fail in the future. (Wires that turned brown when hooked up to current for the first time, come on). And like I said in the previous post, there was nothing unusual done to these servo's. Futaba reciever, 1700mah nicad battery, on off switch, these components all worked together in my Raptor 30 before comming into this bird. And you will notice I say hooked up for the 1st time. These 605's were never even flown yet. They were not even all mounted yet. They had 0 flights on them. No vibration or imporper installation caused this problem. They could have failed the next flight, they could have failed in 10 flights, they could have failed next year, heck they may have never failed. I just lost all confidence in them, and I did not want to be the one to find out if they were going to fail or not. Always wondering if this is the day they were going to decide to take a dive. I have enough trouble getting the confidence I need to fly these whirlybirds, without having mechanical problems steeling my confidence away, that's all. And that is why I sent them back.

I am sure Hitec makes a good product for many peole. They just were not able to for me, and it just happened to be the first time I bought them. Happens all the time.

Now Zoom's hobbies was awesome to deal with. They took the servo's back for return to Hitec, no problems. I did have to have all the included hardware to send back with them. They gave me a slight discount on Futaba servo's, and paid express freight to get them to me. Now that is service, and that is the kind of response that makes me come back for more. Thank you Zoom's!!!!!!

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08-03-2002 02:50 AM  16 years agoPost 15
blazen

rrApprentice

California

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Quote
(Wires that turned brown when hooked up to current for the first time, come on).

I was not really just replying to your post but more or less to every one that has been complained about HItec servos.

I will agree that there appeared to be a problem with your servos

Excessive current draw ?? I would like to know why because even at a full stall I have yet to see a servo draw enough current to melt wires. Did it just melt the power wires or did it also get the Signal wire maybe a short where the wires connect to the PCB..

I would also send that recever back to be checked out also you never know what kind of damage was done

Quote
>>>>Now Zoom's hobbies was awesome to deal with. They took the servo's back for return to Hitec, no problems<<

This makes me wonder if these servos where retuned by another customer who damaged them and then just resold by the retailer.

I know I have returned defective items to the Hobby shop and watched as they closed the package and put the item back up on the shelf to be resold again. I have to ask what are they hoping for?? someone who will not catch the defect or that it will last long enough for the warranty to expire !!!
I really hate that type of poor business practice

73’s
Blazen

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08-03-2002 07:49 PM  16 years agoPost 16
gkforce

rrNovice

on vacation

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The wires never melted, they just got discolored. Across all three wires they were affected in the same place. Some of the servos had 2 places on the wire where it happened. They turned a choclate brown on the white wire, red and black wires were darkened also. It happened in the locations on the wire where they had been folded together tightly for shipping. The servo's had no load on them when turned on for the first time, so the current draw was not high. The wires were like new when I opened the boxes. All the servo's were new condition. I do not think they were resold from another exchange. Zoom's was out of stock on them when I first placed the order, and I had to wait for 5 days till they came in before they could ship them. Originally I asked them to ship ups ground, they sent them to me 2nd day air because I had to wait for them.

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08-16-2002 05:51 PM  16 years agoPost 17
sharam

rrElite Veteran

Northern California - Fly at Morgan Hill Field

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FWIW - My experience
I have seven 605 servos in my Nexus 30 and Caliber 30 helis. I have not had any trouble with them thus far. The Nexus has been flying for 1.5 years and the Caliber for one month. I will post if I have a failure. Thus far, I have been happy. The servos seem to find center quite well - when the heli is trimmed for a stable hover, flown around, and then brought again to a hover, the servos seem to hold the hover nice and steady.

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08-16-2002 06:04 PM  16 years agoPost 18
Doug

rrElite Veteran

Port Saint Luice Florida....

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blazen
How about the Collective servos that "need" to be "hard" mounted to avoid woof?

First member of Member of Bearings Anonymous

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