RE: Hitec 5955 problems  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> RE: Hitec 5955 problems
Page: <<   < prev  1 2 [3] 4   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: Hitec 5955 problems - 1/23/2005 10:33:12 PM   
wind junkie



Posts: 964
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline
quote:

ORIGINAL: mglavin
The servos are not centered because everyones TX outputs a different center or control pulse signal at neutral with sub-trim/trims zeroed out. Thus ONE of the many advantages realized of programmable servos.



I DO like the idea of programmable servos vise the matchbox, but I don't think varying TX pulses explains why every servo shouldn't be able to be mechanically set to a prescribed "zero" position. A TX "center" position with no sub trim offset should give a pulse width of 1.5 mSec going to the servo. I think that was Russian's point was this : theoretically, if you put two servos on a y-harness, they should both be able to be centered exactly the same mechanically (90 degrees to their arms, or whatever measure you like, but BOTH servos should position the same in this way without doing anything special -- correct me if I'm wrong, russian).

It seems to me, that the mechanical centering difference between servos issue is really the inability to mate the pots to a known output gear position. This is an issue on every servo, even analog servos. Once you put all the gears inside the package, and then locate the potentiometer to the output shaft which indicates actual spline position, I think it's tough to actually align the pot so it's dead nuts one spline to another when compared to a different servo. That's why it's just a lot easier to re-program the center position, which can be done much more precisely than gear or spline teeth can be positioned. Pots have manufacturing tolerances, and I just don't think it's possible to electronically trim them so they will match mechanically in this sort of system every time from one servo to the next.

_____________________________

Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

(in reply to mglavin)
       Post #: 51

RE: Hitec 5955 problems - 1/23/2005 10:46:29 PM   
mglavin



Posts: 5200
Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline
quote:

ORIGINAL: wind junkie


I DO like the idea of programmable servos vise the matchbox, but I don't think varying TX pulses explains why every servo shouldn't be able to be mechanically set to a prescribed "zero" position. A TX "center" position with no sub trim offset should give a pulse width of 1.5 mSec going to the servo. I think that was Russian's point was this : theoretically, if you put two servos on a y-harness, they should both be able to be centered exactly the same mechanically (90 degrees to their arms, or whatever measure you like, but BOTH servos should position the same in this way without doing anything special -- correct me if I'm wrong, russian).


As you mention the TX should transmit a control pulse at neutral of 1.5mS, seems they rarely do. It would be advantageous in some circumstance to offer all servos centered and end-point matched. BUT if you're taking full advantage of the programmer and servos theres no point as you'll match them to the specific TX and model application.

_____________________________

Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to wind junkie)
       Post #: 52

RE: Hitec 5955 problems - 1/24/2005 12:46:05 AM   
splais


 

Posts: 2711
Joined: 12/12/2001
From: Yuma, AZ, USA
Status: offline 		Why hasn't anyone stated the obvious. Don't purchase any "new" Hitec product until it has been fielded for some time. I now exclusively use the old tried and true 5945's. Why - because I've been bitten by the "new" Hitec bug a couple of times. Got hoodwinked into buying a couple of 6985's, just recently, before the word got out that these servos were no good for large scale, high torque applications. I really like the price point of Hitec servos, but this company leaves a lot to be desired in their fielding methodology and I think they loose business because of it.

(in reply to mglavin)
       Post #: 53

RE: Hitec 5955 problems - 1/24/2005 6:29:50 PM   
Stick2000



Posts: 153
Joined: 2/23/2002
From: Baltimore, MD,
Status: offline 		Mglavin,

"If you learn how to properly utilize the programmer and understand its function completely you'll come to a better understanding of its distinct advantages over ancillary matching devices. "

The instructions that come with the programmer leave a lot
to be desired! I think that Hitec should include a more detail
and practical example to show how to use the programmer.

Stick2K

(in reply to mglavin)
       Post #: 54

RE: Hitec 5955 problems - 1/28/2005 11:31:53 AM   
Kato


 

Posts: 90
Joined: 8/20/2002
From: Trondheim, NORWAY
Status: offline 		Mike,

Any response from Hitec on the 5955 problem?

Kato

(in reply to Stick2000)
       Post #: 55

RE: Hitec 5955 problems - 1/28/2005 7:53:25 PM   
flyme2dmoon


 

Posts: 155
Joined: 8/15/2002
From: rockville, MD, USA
Status: offline 		I'm also waiting. Hope we get some response soon.

(in reply to Kato)
       Post #: 56

RE: Hitec 5955 problems - 1/30/2005 2:46:36 PM   
deweyd


 

Posts: 370
Joined: 11/12/2002
From: wilberforce, OH, USA
Status: offline 		I'm building a QQ YAK 54 toc version and was using 5995 on the rudder but it is pretty scary that really no one has come up with a solution or a fix for these servo's,, so I will cancel my order also, until I here what is going on with these servo's. I really like hitec servo's and have bought atleast 20 in the past 2-1/2 years. I haven't had any trouble with the servo's ,but I can't afford to do thier testing on my plane.

(in reply to flyme2dmoon)
       Post #: 57

RE: Hitec 5955 problems - 1/30/2005 9:32:35 PM   
russian


 

Posts: 57
Joined: 5/15/2002
From: Ravena, NY, USA
Status: offline 		Just forget about programmer and use them with match box if nessessary. That's all.
JR 8611 don't have programmable features and it's OK! Just use your Hitec 5955, because it is still 330 oz. and JR8611 just 260oz.
I'm going this way.

_____________________________

Born to fly!

(in reply to deweyd)
       Post #: 58

RE: Hitec 5955 problems - 2/1/2005 5:05:53 PM   
wind junkie



Posts: 964
Joined: 11/16/2002
From: N. Syracuse, NY, USA
Status: offline
quote:

ORIGINAL: russian

Just forget about programmer and use them with match box if nessessary. That's all.
JR 8611 don't have programmable features and it's OK! Just use your Hitec 5955, because it is still 330 oz. and JR8611 just 260oz.
I'm going this way.


Well said.

I soon will be outfitting my Comp Arf 2.6 Extra with 5955s. If the specs are correct, they're too good NOT to use, even if I can't program them.

_____________________________

Arguing with an engineer is like wrestling a pig. Everyone gets dirty and the pig likes it.

(in reply to russian)
       Post #: 59

RE: Hitec 5955 problems - 2/2/2005 6:32:28 PM   
P-51B



Posts: 6173
Joined: 10/11/2002
From: An Iceburg in, ANTARCTICA
Status: offline 		So, still no resolution on the BETA release of the 5955's?

_____________________________

In order to think "outside the box", one must first accept there IS a box.

(in reply to wind junkie)
       Post #: 60

RE: Hitec 5955 problems - 2/2/2005 7:16:38 PM   
3D Joy



Posts: 1061
Joined: 12/21/2002
From: , QC, CANADA
Status: offline 		The new version 1.04 is also loaded into the 5945s.

(in reply to P-51B)
       Post #: 61

RE: Hitec 5955 problems - 2/3/2005 3:02:28 AM   
mglavin



Posts: 5200
Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline 		Thus far, the FIX is not available. Hitec is still working out the problem. No word on a timetable to date.

The servos are useable in any event as shipped, even with the deviation from programmed parameters bug once introduced to the programmer.

_____________________________

Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to 3D Joy)
       Post #: 62

RE: Hitec 5955 problems - 2/6/2005 12:24:27 PM   
Slyder



Posts: 527
Joined: 8/25/2003
From: North Vernon, IN, USA
Status: offline

_____________________________

Eric H

(in reply to mglavin)
       Post #: 63

RE: Hitec 5955 problems - 2/6/2005 12:55:57 PM   
mrbigg



Posts: 2793
Joined: 10/30/2004
From: Streator, IL, USA
Status: offline 		so these servos work fine right out of the box? the problems occur when trying to program them? i would like to use a couple of these myself.

_____________________________

PROVERBS 15:22 - Plans go wrong for lack of advice; many counselors bring success.

(in reply to Slyder)
       Post #: 64

RE: Hitec 5955 problems - 2/7/2005 5:45:46 PM   
tobytorkn


 

Posts: 123
Joined: 3/14/2003
From: peebles, OH,
Status: offline 		mr. glavin, i've purchased several of these 5955 servos and have a question about programming them. as i understand it, when you set center and the endpoints on the programmer and then remove it, the servo deviates around 2 degrees. my question is does this happen each time and all in the same direction, and is it repeatable. if so, i can still match the servos using the programmer and use the transmitter to set center. if i remember correctly all of my 5945's did this and i just compensated and set each servo with no problem. thanks again. toby silhavy
www.silhavyaerosports.net

(in reply to mrbigg)
       Post #: 65

RE: Hitec 5955 problems - 2/7/2005 8:49:31 PM   
mglavin



Posts: 5200
Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline
quote:

ORIGINAL: tobytorkn

mr. glavin, i've purchased several of these 5955 servos and have a question about programming them. as i understand it, when you set center and the endpoints on the programmer and then remove it, the servo deviates around 2 degrees. my question is does this happen each time and all in the same direction, and is it repeatable. if so, i can still match the servos using the programmer and use the transmitter to set center. if i remember correctly all of my 5945's did this and i just compensated and set each servo with no problem. thanks again. toby silhavy
www.silhavyaerosports.net



While each servo may differ slightly, the offset deviation is consistent of each servo. It simply becomes the programmed center and end-point parameter. There's no need to use the TX trims to set center or end-points, utilize the programmable features of the servos to match the TX. With an iteration method you can and should be doing this anyway.

_____________________________

Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to tobytorkn)
       Post #: 66

RE: Hitec 5955 problems - 2/7/2005 9:38:47 PM