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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> 5625 Problem
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5625 Problem - 9/15/2002 2:58:51 AM   
aerobat66-RCU



Posts: 131
Joined: 12/2/2001
From: Acworth, GA, USA
Status: offline 		I have a problem with some 5625's. These have the "Modified July 2001" sticker on them, so I thought the old overdrive problem would have been fixed.

Specifics: 8103 Tx, JR R600 Rx, 6v 1650 NiMH.

Problem: When the travel adjustment is set anywhere above 100% and/or the dual rate is above 100%, the servo sometimes stops short of full travel. If I just barely move the Tx stick off of the stop, the servo jumps up to full travel. This only happens about 80% of the time. I'm using them for dual elevator servos, so you can imagine the havoc that would be played in the air. This happens whether I'm using a Y-harness, or separate channels. They also appear to be moving at different speeds, again only some of the time.

It appears to me that the servos are defective. Is the programmer capable of fixing a problem like this, or should I just send them back to Hitec?

Thanks,
John
       Post #: 1

5625 Problem - 9/16/2002 9:09:26 PM   
MikeMayberry



Posts: 2864
Joined: 1/15/2002
From: Poway, CA, USA
Status: offline 		You should reset them with the HFP-10 programmer or you can send them into Hitec to have it done. This will update the software to the latest version.

Mike.

(in reply to aerobat66-RCU)
       Post #: 2

5625 Problem - 9/17/2002 5:41:58 AM   
WreckRman2



Posts: 1495
Joined: 5/13/2002
From: Indianapolis, IN,
Status: offline 		ATTENTION! If you reset them let them sit with power for 15-20 minutes before you fly them to see if they jump and won't hold center. I reset mine and on the next flight I lost my plane. Mike says there are no known issues however if you read the following thread there are at least 3 people with the same problems.

http://www.rcuniverse.com/forum/tm.asp?m=204773

Sure Hitec said they would repair or replace the servo but what about my $500 airplane... Until they tell me different I am warning others of my own mishap to help prevent others from losing a plane..

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David Smith

(in reply to aerobat66-RCU)
       Post #: 3

5625 Problem - 9/17/2002 8:58:47 AM   
aerobat66-RCU



Posts: 131
Joined: 12/2/2001
From: Acworth, GA, USA
Status: offline 		Thanks for the replies, Mike and David. I'm waiting on my programmer to arrive. I sure hope this fixes this and any other programming issues with the servos. I sure would hate to lose a $1500 plane over this problem.

Mike, I've had a good experience with Hitec's service the one time I had to send something in. I had a 225 whose motored burned up, and you guys replaced the motor even though I had lost my receipt. I appreciate that.

I would like to suggest that you take your excellent customer service one step further and acknowledge with a post here on RCU that Hitec digitals manufactured before a certain date may very likely have a problem. I know it would cost money short-term, however, it would benefit Hitec's reputation greatly in the long run, and in turn I'm sure you would more than recover the cost of fixing the defective servos in advance, rather than after the crash.

As long as updating the software on my servos completely takes care of the problem, I will continue to exclusively purchase Hitec servos in the future.

John

(in reply to aerobat66-RCU)
       Post #: 4

5625 Problem - 9/17/2002 9:17:16 AM   
WreckRman2



Posts: 1495
Joined: 5/13/2002
From: Indianapolis, IN,
Status: offline 		Dude, don't count on that completely solving your problem. I did it and it created my problems. Hitec would never admit there is an issue with their servos however once you lose a plane or find the problem before hand they will gladly fix or replace it. If you do program them make sure you throughly test them before putting your plane in the air. Your right though, if they would admit it and recall the bad servos then we would all be happy but we all know that won't happen...

I'd hate to see your plane look like this because of servo failure... The plane had 4 sucessful flights then I reset the servos. On the 5th flight the left aileron servo held the aileron up causing the crash.



< Message edited by WreckRman2 -- Sep 17 2002 4:31AM >

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David Smith

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5625 Problem - 9/17/2002 10:30:56 PM   
MikeMayberry



Posts: 2864
Joined: 1/15/2002
From: Poway, CA, USA
Status: offline 		I have. Here it is again.

Important Information Regarding Digital Servos

While Hitec strives to deliver high quality products that work universally with a wide variety of other manufacturers equipment we occasional run across a compatibility issue with products other than our own.

In light of this it has come to the attention of Hitec, that our digital servo product manufactured prior to October 2001 may act erratically when used with a non Hitec computer radio where the user has programmed the ATV settings beyond 125%.

As a result of this finding Hitec would like to extend an offer to all owners of our digital servos built prior to October 2001. If your servo has the following identification labels on it, they will qualify for this free reprogramming service.


The affected servos are labeled as"Modified" with the dates listed below:
APR2001
MAY2001
JUNE2001
JULY2001
AUG2001
You can return your servos to the Hitec service department for reprograming with the latest software version, or you can upgrade the servo software yourself, using the RESET function of the Hitec HFP-10 Digital Servo Programmer with software version, 1.03 or higher. This will "update" your servo and should fix any known conflict with the non-Hitec equipment.

Additionally any HFP-10 programmers that contain a software version earlier than version 1.03 can be upgraded free of charge by by returning it to our service department in Poway, California.


Mike.

(in reply to aerobat66-RCU)
       Post #: 6

5625 Problem - 9/17/2002 11:54:53 PM   
GrnBrt



Posts: 6992
Joined: 12/5/2001
From: Everett, WA, USA
Status: offline 		Well there you go, ask and you shall receive!!!!


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US Army Special forces, mess with the best, die like the rest!

(in reply to aerobat66-RCU)
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5625 Problem - 9/18/2002 12:10:57 AM   
747drvr



Posts: 1230
Joined: 1/25/2002
From: Dundas, ON, CANADA
Status: offline 		I have 2 5645's that are dated april2001. Please confirm that this is only an issue if I have the ATV above 125%. Mine are set aroung 60% . Is it OK to defer modification until after flying season without undue concern.

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Marc Thomson
Dundas, Ontario, Canada

(in reply to aerobat66-RCU)
       Post #: 8

5625 Problem - 9/18/2002 1:15:42 AM   
MikeMayberry



Posts: 2864
Joined: 1/15/2002
From: Poway, CA, USA
Status: offline 		747drvr- At this point I would recommend you update the programming just to be safe.

WreckRman2- I know you are upset and I would be too if I lost such a beautiful plane. However, your insinuation that there is a "known" problem and that we should recall all the "defective" servos is way off base. Hitec has literally sold 10's of thousands of digital servos and very small amounts have had any problems. However, since most of the digitals go into more expensive airplanes, if one fails it gets more attention. I believe your problem possibly came from resetting the program through the extension.

Mike.

(in reply to aerobat66-RCU)
       Post #: 9

5625 Problem - 9/18/2002 2:14:37 AM   
WreckRman2



Posts: 1495
Joined: 5/13/2002
From: Indianapolis, IN,
Status: offline 		747drvr, If your servos are working fine now and you aren't exceeding 120% ATV then I'd say leave them be. My radio doesn't even go over 120% ATV however like you I thought I would reset them because Hitec recommended it. This resulted in a lost plane on the next flight. Like the good saying goes if it isn't broke don't fix it. I sure wish I'd left mine alone.

Mike, your right, if it was a $100 trainer I wouldn't be as upset however let me ask you this question being that we used a friends programmer to reset my servos and I don't have a manual. Does the manual for the programmer state that one should NOT go through an extension while using the programmer? If this is the cause of my servo going nuts, which I feel isn't, then why am I reading of the same problem with others including one case of a 5625 doing this fresh out of a new box.

My goal here is not to dog out Hitec servos but to find a reason for my loss so others can benefit from my loss. If going through an extension is indeed the cause then let's get that word out so this doesn't happen to any others...

You know you made a comment on the phone that like losing a plane one could easily get in a traffic accident in our car. While this is true the difference is we all carry insurance to cover accidents in our vehicles while in the case of our planes we are left with a loss, period. There is no doubt in my mind that servo failure is the result of my crash whether it was from a faulty motor, bad programming or whatever. I'm trying to learn from this loss so that myself and others can possibly prevent it in the future. One would think Hitec as a company would want to do the same instead of just saying send it to us and we will stand behind our product by repairing or replace the servo.

I've already read one thread here where Hitec repaired a servo for doing this same thing and it did it again after you repaired it... The funny thing is that thread magically disappeared today!

http://www.rcuniverse.com/forum/tm.asp?m=25941

Is this a coincidence or is Hitec trying to hide something. After all you are the moderator for that forum Mike and most likely have the ability to delete posts..

< Message edited by WreckRman2 -- Sep 17 2002 9:55PM >

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David Smith

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5625 Problem - 9/18/2002 3:29:56 AM   
WreckRman2



Posts: 1495
Joined: 5/13/2002
From: Indianapolis, IN,
Status: offline 		Mike, after a little research no where in the manual for the programmer does it state the programming of the servos should be dirrectly hooked to the programmer and that going through an extension could cause problems. If you still feel this is the cause of my failure then Hitec has a problem. We followed the directions provided with the programmer to properly reset the servos as reccommended by Hitec and well you know the result.

I'll try to get these servos sent back to you within a day or so but like I mentioned on the phone if we can't determine what caused the failure in your servos I will no longer use them. I don't think that is to much to ask since my incident isn't the only time this has happened... Hitec needs to spend more time trying to determine the cause of failure instead of just replacing servos.



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David Smith

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5625 Problem - 9/18/2002 6:02:06 AM   
WreckRman2



Posts: 1495
Joined: 5/13/2002
From: Indianapolis, IN,
Status: offline 		Continuing on with my research you mention above that you, Mike, believe my problem possibly came from resetting the servos through the extension. You mention this as a possible reason for my failure and we know the manual for the programmer does not say you can't use an extension while resetting the servos however on another post made by you in July 2002 you state the following in responce to someone asking if he could extend the leads via soldering:

"The only problem with that is the servos cannot be programmed through the long leads, or extentions. They can only be programmed through the stock lead.

So, if you don't plan to program them it will be fine.

Mike."

Later in the thread you say:

"they don't like anything over 4" even with our heavy duty wire."

Now this leads me to belive that you, spokesman for Hitec, are aware of problems trying to reset or use the programmer via an extension on the servo. If your statement above is true then this could possibly be the cause of my failure however how can I be held responsible for causing it if it is a known issue that servos cannot be correctly programmed via an extension and why is there NO mention of this in the manual for the programmer?

If you know this and Hitec knows this then why are the programmers being sold without complete directions and rules of how to properly program servos. We followed the directions that came with the programmer and if it had stated that one can not use an extension then by all means we wouldn't have used one and quite possibly not be where we are if this is indeed the cause of my failure....

Sorry but I still feel something is being held from the public...

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David Smith

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       Post #: 12

So, Where DID it go ???? - 9/18/2002 6:14:45 AM   
Aerosplat



Posts: 707
Joined: 12/11/2001
From: Lawrenceville, GA, USA
Status: offline 		Originally posted by WreckRman2 :
[QUOTE]I've already read one thread here where Hitec repaired a servo for doing this same thing and it did it again after you repaired it... The funny thing is that thread magically disappeared today!
http://www.rcuniverse.com/showthrea...941&forumid=149
Is this a coincidence or is Hitec trying to hide something. After all you are the moderator for that forum Mike and most likely have the ability to delete posts.
[/QUOTE]
Since I originated that thread about the problem with my HS-5925 servo, and I referenced it in this later thread:
I WOULD VERY MUCH LIKE TO KNOW WHERE THE THREAD WENT !
There was NOTHING in that thread offensive or inflammatory about Hitec or anyone else. It contained factual information, questions, and answers.

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---- Robert ----
"If you put a big enough engine on it, even a brick will fly. But it will never 3-D"

(in reply to aerobat66-RCU)
       Post #: 13

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