Another HS-5625 Failure -- This one from Jan 02 Lot  
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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 >> Another HS-5625 Failure -- This one from Jan 02 Lot
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Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 6:54:58 AM   
Big Edge


 

Posts: 44
Joined: 7/3/2002
From: Palm Harbor, FL, USA
Status: offline 		Here we go..
H9 Edge 540 -- Saito 1.80 ----W/17x8 APC
TX Futaba T6XAS PPM
Battery 4.8 v 1400 mah
RX Hitec RCD3200 FUT FM/HFD-08RD
Servos 5 HS-5625MG - 1 Rudder w/pull pull, 1 on each aileron w/12" HPI heavy extension, 1 on each elevator half w/miracle Y 1 HS-81MG for throttle.
Long story short,
Purchased 5 HS-5625MG from Tower on 6/5/02. One of the servos was DOA, when I powered it up it went to full deflection and would not accept TX input. Called Tower, no problem send it back and we will send you a new one.
After installing my new servo I got some flight time on the Edge, I don't do 3d stuff, I'm kinda laid back in my flying style and only get a few hours of time on Sundays. Beautiful weather here in central Florida in June, temp in the 80's.
Now its early December and during a taxi my right aileron goes south and stays there, Hey no problem I'll call tower and order another one 12/17/02.
My new servo arrives and I power it up. It works fine so I decide to take the Edge out, fire it up and see if everything checks out.
After startup I ran the engine up and tweaked the needle, pulled the throttle back and then checked my control surfaces. Thats when I noticed my right aileron had gone to full deflection again.
I have tried both of my failed servos on another PCM receiver that I have with the same results, with or without extensions.
Thats it,...

_____________________________

In Thrust We Trust

(in reply to hilleyja)
       Post #: 26

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 8:38:50 PM   
xp8103



Posts: 768
Joined: 12/5/2001
From: Augusta, ME, USA
Status: offline 		It's truely odd that this subject elicits such a variety of responses given that the factory rep is so involved and visable.

I am about to give 5645s a go in my 25% Midwest Super Stinker. I ran the engine (ZDZ40) in my driveway and put about a tankful thru it (25 minutes of on time). During the run, I exercised the 5645's quite a bit. I taxiied around, ran the engine up, did some remedial range checking. With that time and all the time on the bench setting up, I have more than an hour of exercising.
Knock on wood, the servos havent flinched.


_____________________________

Nik Rende
AMA 83249

(in reply to hilleyja)
       Post #: 27

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 8:52:14 PM   
hilleyja


 

Posts: 2176
Joined: 1/7/2002
From: Salem, WV, USA
Status: offline 		[QUOTE]Originally posted by xp8103
It's truely odd that this subject elicits such a variety of responses given that the factory rep is so involved and visable.

I am about to give 5645s a go in my 25% Midwest Super Stinker. I ran the engine (ZDZ40) in my driveway and put about a tankful thru it (25 minutes of on time). During the run, I exercised the 5645's quite a bit. I taxiied around, ran the engine up, did some remedial range checking. With that time and all the time on the bench setting up, I have more than an hour of exercising.
Knock on wood, the servos havent flinched. [/QUOTE]

Do you have the Hitec programmer or know someone local that does? I recommend you run each of those servos through about 15 minutes of maximum deflection -- if they don't glitch in that environment FLY.


_____________________________

Jim Hilley
AMA #671825
RCCA# 758
Twist 150 Brotherhood #14

(in reply to hilleyja)
       Post #: 28

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 9:23:36 PM   
akflyer



Posts: 584
Joined: 1/24/2002
From: Soldotna, AK, USA
Status: offline 		I was told that the chip used in the servo was changed from one manufacture to another. It is the servos with the new chip that we have been having problems. ALL of our servos have failed only when cold. I put them in the freezer for an hour then check them. Two servos would go to full deflection then lock up, three would revert back to factory programming and the rest were just fine. All servos appeared to be functioning fine at room temperature.

Mike - Are you telling me that a servo with 168 oz torque is only good for a 1/4 scale or less..... Why in the h#ll would you make such a strong servo for such a wimpy application. ???

(in reply to hilleyja)
       Post #: 29

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 10:35:59 PM   
Rudeboy



Posts: 3255
Joined: 12/9/2002
From: Bejing, BELGIUM
Status: offline 		15 years back people were flying big scale planes with 40 oz torque servos. Maybe not 3D type flying with a 1/3 aerobatic, but still...

(in reply to hilleyja)
       Post #: 30

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 11:27:46 PM   
AV8TOR


 

Posts: 427
Joined: 12/28/2001
From: Mount Vernon, OH, USA
Status: offline 		[QUOTE]Originally posted by Rudeboy
15 years back people were flying big scale planes with 40 oz torque servos. Maybe not 3D type flying with a 1/3 aerobatic, but still... [/QUOTE]
And they were not driving them past 125% with expo radios either. This could be part of the problem.

(in reply to hilleyja)
       Post #: 31

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/5/2003 11:52:21 PM   
MikeMayberry



Posts: 2807
Joined: 1/15/2002
From: Poway, CA, USA
Status: offline 		Big Edge- The fact that the servos failed on one control surface one after the other leads me to believe that there is some factor at work here although nothing that you posted looks out of the ordinary except for the miracle y-harness. We have heard of problems with them. I would suggest you have the servo reversed through the software.

akflyer- Who told you the chip was changed? We will do some testing with your freezer theory and see if we can reproduce your results.

No, that's not what I am telling you... here is exactly what I said: "That is not to say that they CANNOT be used in larger aircraft but that there is a better choice with the 59XX series "Premium" servos that were specifically designed for the abuse that these larger planes can dish out."

AV8TOR- The EPA is not an issue in the latest V1.03 software versions.

Mike.

(in reply to hilleyja)
       Post #: 32

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/6/2003 12:32:22 AM   
akflyer



Posts: 584
Joined: 1/24/2002
From: Soldotna, AK, USA
Status: offline 		Mike - I am at work now so I wont be at home for 2 weeks to see what the name of the tech rep I talked to was, but he stated that the new chip had only been tested to 4 deg celcius. This is way above the temps that we fly at for most of the year. I generally dont fly below zero because the fingers get to cold too quick but I did fly all last year with 5625's in all kinds of temps and never had a problem with them. It has only been with the new servos I purchased this year. I also know that it is not just my servos that dont like the cold, as two others from our club have had the same thing happen in the last month.

I will say that I really hope to get this figured out as there is not a better servo on the market FOR THE MONEY, and I really like the programming feature.
I do not want to jump on a "badmouth hitec bandwagon" I just want the problems to get resolved so I can buy more servos from you and feel good about doing it.

(in reply to hilleyja)
       Post #: 33

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/6/2003 4:00:09 AM   
Hubb


 

Posts: 369
Joined: 3/16/2002
From: Lebanon, OH, USA
Status: offline 		[QUOTE]You don't need a free replacement warranty for Hitecs gear train. They don't break or wear out as directly compared head to head with HS-5945 and a JR's 8411.[/QUOTE]

I did replace the gear set on 6 of my 5945's before last season ('02 season). but this was after 250 or so flights! that seems reasonable to me and would not expect a free replcement. I have worked my 5945's hard in 1/3 and 35% planes for two years now with great results and they are my servo of choice.

with that being said, my latest project is a 1/3 scale staudacher equiped with 5645's one each on ail and elev. I had them from another plane that I purchashed and they have never been flown. I have reprogrammed each servo and have done the complete plane set-up. I run 5 cells with no regulator and 22 gauge extensions. I have not had any failure or glitch at least in the shop. the 59xx series is definitely superior to these, but as an experiment in economy I decided to give the 5645's a shot. i will advise those of you on this thread of my experience with them as soon as I get to fly, as I have followed this thread with great interest.

I may kill two birds with one stone (FIGURATIVELY I hope ) as I will be flying these on a 1/3 sclae aerobatic plane and living in the NE region probably in cold (30-40's deg) weather.

Hubb

(in reply to hilleyja)
       Post #: 34

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/6/2003 5:32:18 AM   
Big Edge


 

Posts: 44
Joined: 7/3/2002
From: Palm Harbor, FL, USA
Status: offline 		I have decided to give the 5625's another shot. I'm going to send them all in for service. I will also do as you suggested Mike and have one of the servos reversed so I can get rid of the miracle Y.

Mike, thanks for your time in reviewing my post.

I'll post again when I get my servos back, good news I hope.

_____________________________

In Thrust We Trust

(in reply to hilleyja)
       Post #: 35

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/6/2003 7:32:29 PM   
xp8103



Posts: 768
Joined: 12/5/2001
From: Augusta, ME, USA
Status: offline 		Jim,
Actually, I have a Hitec servo programmer on the way. Should be here next week. I will plug the servos in and let the programmer work them over. Will post my results.


_____________________________

Nik Rende
AMA 83249

(in reply to hilleyja)
       Post #: 36

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/7/2003 1:08:38 PM   
Ricmussman


 

Posts: 244
Joined: 12/14/2001
From: Hamilton, OH, USA
Status: offline 		I have just finished reading this thread with great concern. I too have 5625 on all areas of my new WM Patty Wagstaff Extra 300s. I am using 4.8v 1800 Ma pack with a new JR 549X 9 Channel Rx and a 8103 Tx. I will not use any Y harnesses and I also have a GEM 2000 sys monitor on board. Some of the servos I have used before and some are new out of the box. I have yet to have any fail during setup, but I have not gotten to the field yet and done an adequet range check. My plane is not ready to see blue skies. I still need to pad equipment and balance. I might go to a larger engine as well.

In all of the previous post I have not heard of any problems with JR Rx's & Tx's and the servo failures. Is this just a strange coincidence or could this be part of the problem? All of you guys are using Futaba Tx's, which is fine, I am not saying anything about one being better than other. I'll save that for a different thread. This is just something that noticed as I read through all of the postings. What do you guys think?

_____________________________

For YOUth,
Ric

(in reply to hilleyja)
       Post #: 37

Another HS-5625 Failure -- This one from Jan 02 Lot - 2/7/2003 5:47:41 PM   
hilleyja


 

Posts: 2176
Joined: 1/7/2002
From: Salem, WV, USA
Status: offline 		Actually, the RX I was using when I first plugged in the HS-5625 was a Futaba R128DF -- it ran fine on the bench. When I replaced that RX with a Hitec 3200 Supreme 8 it failed almost immediately.

I reset the servo a couple of times right after the failure and it still failed. I tried resetting it again a couple of days later and it worked fine -- it was sent back to Hitec for replacement.

I have not had any other failures and I have (8) HS-5625s and (2) HS-5645s but as I indicated above I will run these servos on the bench, under load, for at least 15 minutes with my Hitec programmer.


_____________________________

Jim Hilley
AMA #671825
RCCA# 758
Twist 150 Brotherhood #14

(in reply to hilleyja)
       Post #: 38

HiTec 5625 problem - 2/7/2003 10:34:39 PM   
Nickrc3



Posts: 391
Joined: 1/12/2002
From: Miami, FL, USA
Status: offline 		Big Edge,

I had the identical problem occur with a new 5625 at the Deland festival last weekend on my new Ziroli Skyraider. After the inital test flight, I wheeled the model back to the pits to make engine/trim adjustments. With everything turned on, one aileron servo suddenly went full up and locked. Shut everything down, same behavior an hour later.

I boxed up the 5625 and sent it to Hitec this morning. I'm using four of the 5625's (dated Mar. 02), 2 pairs-2 units wired into a "y" configuration on ailreon and elevator, 24" length/22AWG extensions, and twin 4.8 volt, 1650 mah paks. I do not own the programmer.

This was my first experience with any manufacturer's digital servo. Maybe I should of stuck with the old 9202's from Futaba- $55.00 and never a problem.

The 5600's attracted me because of their torque, centering, metal gears and their cost. Now, naturally, I'm very concerned on the reliabilty of these servos.

Nick

(in reply to hilleyja)
       Post #: 39

Another HS-5625 Failure -- This one from Jan 02 Lot - 3/17/2003 11:33:59 PM