RE: Hitec 5955 problems  
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RE: Hitec 5955 problems - 1/13/2005 7:16:03 PM   
Ryans Rebel


 

Posts: 1171
Joined: 7/6/2002
From: St. Martinville, LA, USA
Status: offline 		I called Hitec about these issues and I was told they were working on new software but curruently there was no problem with the 5955 or programming the 5955 with any version programmer. I am planning to buy (6) of these but want to be sure.

This centering problem, are you guys talking about centering the servo on the programmer and once it is plugged into the RX. it is different? If so, I have had that issue with all of my hitecs. I simple try it a few times until I get it centered correct on the Rx.

The Gittering: is it at the end points on the programmer or once it is plugged into the Rx. Again, I experience gittering on all of my hitech at extreme end points only on the programmer.

All of my experience has been with 5945s & 5645s. A total of 15 servos and approximately 200 flights with no problems at all.

Ryan

(in reply to shannah)
       Post #: 26

RE: Hitec 5955 problems - 1/13/2005 10:50:56 PM   
JPrc


 

Posts: 379
Joined: 2/1/2002
From: BOSSIER CITY, LA, USA
Status: offline 		One of the problems with centering may be the radio you are using. When you program your servos' center with the programmer it will not match if you are using a futaba radio. They tend to be off about 2-4 degrees. If you use your programmer then plug them into a JR radio the hold centering perfect. I spoke with hitec about this last year and the reason they gave me is futaba's centering is at 1530us (not sure if that is the correct terminology) and JR and Hitec are at 1500us. This is why they never hold the same center or end points when you use a futaba radio. I suspect this may attribute why some people are having them burn up in there planes. They think the servos are programmed and matched but they are not and end up crapping out. The way I program all of my servos is on a tray with a degree wheel and a pointer. I screw the servos into the tray and attach the servo arm I plan on using with that servo. I then attach the pointer to the servo arm. I reset the servo then program 0 degrees for center and 60 degrees for my endpoints. I have a pen and pad ready and mark down the number for 0 degree center (usually anywhere up to +or- 10 on the programmer) and I also right down the numbers on the programmer the correspond with 60 degrees deflection in both directions ( Usually around +135 in one direction and - 135 in the other direction). I then plug the servo into the receiver and it is alway off several degrees and center and endpoints. I focus on setting the center point first. I note what direction the servo is off center (say 3 degrees to the right). I then plug in back into the programmer and go back to the number that I wrote down that gave me 0 degrees center, I then off set the servo 3 degrees to the left to compensate for the difference with the futaba radio. Make sure you write the new center down and set the endpoints back at +and- 135 (you have to set the center and endpoints every time you reprogram the servo). Plug the servo back into the receiver and check the center to see if you have offset the servo enough. If not repeat the process till the servo is at 0 degrees center when pluged into the receiver. Next you can set the endpoint by using the same method just remember to write down and changes to the center and endpoints you make and to make sure you trim on your transmitter is at zero and your endpoints (atv) are maxed out at 140. Also once you use a servo arm on a servo leave it on that servo. Do not use one servo arm to program all of your servos. All of my servos are matched before I put them in my plane and I use my linkages and control arms to match deflection on the surfaces. By programming servos this way it keeps the geometry the same and prevents binding not just at the endpoints but through the whole rotation of the servo.


Another way to program the servos is to buy a JR radio, screw them to the servo tray, set your center and end points with the programmer then stick them in your plane. They match perfect with a JR radio every time. I am seriously considering switching my futaba gear to JR for this reason.

(in reply to Ryans Rebel)
       Post #: 27

RE: Hitec 5955 problems - 1/13/2005 10:58:22 PM   
Ryans Rebel


 

Posts: 1171
Joined: 7/6/2002
From: St. Martinville, LA, USA
Status: offline 		That is exactly how I program my servos, less the pointer apparatus. Never a problem in the air.

Is what spicdoc is explaining the "centering issue" you guys are experiencing?

Ryan

(in reply to JPrc)
       Post #: 28

RE: Hitec 5955 problems - 1/13/2005 11:07:18 PM   
Crash90



Posts: 2310
Joined: 10/5/2002
From: Cressona, PA, USA
Status: offline 		I wonder if spindoc is on to something there. When I programmed my servos, I was very careful to operate them with the TX (futaba) before connecting them together. I wonder how many people hook servo 1 to the RX. Hook servo 2 to the programmer, move servo 1 with the TX and program center, and endpoints on the other. If they don't realize that the servo will be off by 3 degrees when they hook servo 2 to the Rx they will burn out one of the servos. We should take a poll to see if the majority of hitec failures are occuring with Futaba owners. HMMMMM

(in reply to Ryans Rebel)
       Post #: 29

RE: Hitec 5955 problems - 1/13/2005 11:27:10 PM   
cwoodstx


 

Posts: 73
Joined: 1/9/2002
From: Plano, TX, USA
Status: offline 		Hi guys, thanks for the replies. Let me try to answer those points.

I am using a JR 10X TX and the only issue I have found with programming Hitec servos and using the 10X is that the maximum throw at 150% ATV will be about 1 degree less when the servo is connected to the TX. In other words if the max throw on my rudder is 45 degrees each way when I set the end points with the programmer, then when I plug them into the RX the max throw will be 44 degrees. That pattern has been very consistent with all my Hitec servos. I have no problems with centering - the JR TX center is exactly the same as the programmed center with all my other Hitec servos.

In this particular case with the 5955 the center was always off by 2-3 degrees and it would vary each time I moved the TX stick to full throw and back to center. In addition, the 5955 would jitter at various points in the rotation.

To verify that my setup was not the problem, I plugged in a 5945 and used the same setup procedure with the programmer and it was perfect. The 5945 centered perfectly and there was no jitter even at extreme throw.

From what I can tell so far from the posts here and at the Flying Cirkus forum is that there is a problem programming the 5955 with the 1.03 firmware that is on the programmer. I verified that to some extent by testing a new 5955 before and after programming the center and end points. I did not do a reset this time, just programmed the center and end points, and the problems started.

Its always possible that I have some bad servos so I sent them in to Hitec last week. Its always possible that its operator error, I have done dumb things before in this hobby, but my son helped me with the last test and we got the same results.

I heard that Hitec is still investigating the problem, so I'm waiting for a response from Mike Glavin or directly from Hitec.

I'll post information as I receive it.

(in reply to Crash90)
       Post #: 30

RE: Hitec 5955 problems - 1/13/2005 11:58:42 PM   
Ryans Rebel


 

Posts: 1171
Joined: 7/6/2002
From: St. Martinville, LA, USA
Status: offline 		Who is Mike Glavin?

(in reply to cwoodstx)
       Post #: 31

RE: Hitec 5955 problems - 1/14/2005 12:49:43 AM   
cwoodstx


 

Posts: 73
Joined: 1/9/2002
From: Plano, TX, USA
Status: offline 		Forum moderator and Hitec support rep. See post #3 in this thread.

(in reply to Ryans Rebel)
       Post #: 32

RE: Hitec 5955 problems - 1/14/2005 5:00:55 PM   
OnTheEdge



Posts: 1157
Joined: 1/14/2002
From: Drums, PA, USA
Status: offline
quote:

ORIGINAL: Ryans Rebel
This centering problem, are you guys talking about centering the servo on the programmer and once it is plugged into the RX. it is different? If so, I have had that issue with all of my hitecs. I simple try it a few times until I get it centered correct on the Rx.

Ryan


Yeah, I was just think about this the other day as well. I recall having the same situation with my 5945's. I simply just just estimated the change is degrees that I had seen and then programmed it so the change would put them right where I needed them. It was frustrating at first but eventually everything worked fine.

I have since talked with two other friends and both had the same thing occur on all their Hitecs. One of them also had this same problem with the Multiplex programables as well and they were off even further. My guess is the signal from the radio can be a slight bit differnent, hence the change...??? Just a guess

.......Mark

_____________________________

Avoid zen aerobatics...when the ground........and the plane.......become as one.

(in reply to Ryans Rebel)
       Post #: 33

RE: Hitec 5955 problems - 1/14/2005 5:06:16 PM   
OnTheEdge



Posts: 1157
Joined: 1/14/2002
From: Drums, PA, USA
Status: offline
quote:

ORIGINAL: Spindoc

One of the problems with centering may be the radio you are using. When you program your servos' center with the programmer it will not match if you are using a futaba radio. They tend to be off about 2-4 degrees.


Yep, mine's a Futaba.

_____________________________

Avoid zen aerobatics...when the ground........and the plane.......become as one.

(in reply to JPrc)
       Post #: 34

RE: Hitec 5955 problems - 1/14/2005 5:32:23 PM   
Crash90



Posts: 2310
Joined: 10/5/2002
From: Cressona, PA, USA
Status: offline 		Well dang. Since we all seem to have had the same problem, maybe there should be something in the instruction manual pointing this out. I'll bet that this is responsible for alot of the failures we are seeing with the programables.
I hooked my 5955 up to my rx last night and experienced NO problems with jittering. I did not hook it up to the programmer.



EDIT: Or better yet, maybe Hitec could include a fix for this with the next software upgrade.

< Message edited by Crash90 -- 1/14/2005 5:34:46 PM >

(in reply to OnTheEdge)
       Post #: 35

RE: Hitec 5955 problems - 1/14/2005 7:56:45 PM   
gjdeluca


 

Posts: 25
Joined: 9/18/2002
From: Mechanicsburg, PA, USA
Status: offline 		Guys,

This thread seems to be getting off track. There is a definite problem with programming the new hitec 5955 servo and it is totally not related to the brand of tranny. If you program the servo with the programmer to set the center and end points and then use the programmer manual test function, you will see that the center and end points are actually 2 to 3 degrees away from where you programmed them. AGAIN - THIS HAS NOTHING TO DO WITH THE BRAND OF RADIO, ACTAULLY IT HAS NOTHING AT ALL TO DO WITH ANY RADIO. IT IS A PROBLEM BEWTEEN THE SERVO AND THE PROGRAMMER. Just wanted to make sure the REAL PROBLEM is not lost in all the garble.

(in reply to Crash90)
       Post #: 36

RE: Hitec 5955 problems - 1/14/2005 8:03:17 PM   
Crash90



Posts: 2310
Joined: 10/5/2002
From: Cressona, PA, USA
Status: offline 		Yeah. I guess this thread was hijacked. Not to worry, as soon as there is an answer we will all know.

(in reply to gjdeluca)
       Post #: 37

RE: Hitec 5955 problems - 1/16/2005 2:21:27 AM   
vatechguy3


 

Posts: 759
Joined: 4/5/2002
From: Suffolk, VA, USA
Status: offline 		any news yet about a fix for these problems??

tony

(in reply to Crash90)
       Post #: 38

RE: Hitec 5955 problems - 1/20/2005 3:28:05 AM   
Ryans Rebel


 

Posts: 1171
Joined: 7/6/2002
From: St. Martinville, LA, USA
Status: offline 		Just received 6 of these servos. Should I or should I not program them. I have always made a habbit of reseting and reprogramming all of my hitech servos.

Ryan

(in reply to vatechguy3)
       Post #: 39

RE: Hitec 5955 problems - 1/20/2005 4:52:11 AM   
Crash90



Posts: 2310
Joined: 10/5/2002
From: Cressona, PA, USA
Status: offline 		Don't know. I would say not. Hitec must have found a problem. Would have only taken an hour to test a few and tell us that they couldn't duplicate it. They must have found a problem and they are working on fixing it. Got me 2 new 5955s and a brand new programmer. Haven't even taken it out of the box and it's obsolete. LOL (the programmer, that is)

(in reply to Ryans Rebel)
       Post #: 40

RE: Hitec 5955 problems - 1/20/2005 2:36:45 PM   
flyme2dmoon


 

Posts: 155
Joined: 8/15/2002
From: rockville, MD, USA
Status: offline 		Good thing I read this post. I was about to purchase a few of 'em. Hope they come out with an answer soon.

(in reply to Crash90)
       Post #: 41

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