5955 "Stepping"  
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JR R2000, JRPR2000 10CH RX, and JR Synth TX Module
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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 >> 5955 "Stepping"
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5955 "Stepping" - 4/18/2006 3:59:56 AM   
sillyness



Posts: 2282
Joined: 1/1/2002
From: Demorestville, ON, CANADA
Status: offline 		I am doing my final setup prior to maidening my 35% Panzl and noticed an odd phenomenon on the elevators (I haven't gotten to the ailerons yet and the rudder being pull is like dampened).

It should be said that these are my first 5955s and my first Synth RXs. I have been flying Multiplex IPD crystalled in the past, and I have been flying 8611A servos... very smooth, though sloppy. Anyway...

If I go full stick very quickly the servo run from stop to stop just like it should.

If I take about 1/2 second from stop to stop it seems like the servos stops momentarily at each posistion in between the stops... the net result is that the surface looks like it is vibrating through the travel. Very strange. The transmitter makes other servos work smoothly.

Setup:
1 5955 per elevator half
Each servo plugged into a different RX
RXs are new Multiplex 9ch Synth IPD RXs (The say software 1.21 on them)
JR 10X TX
6.0V regulated power
ATVs at +/- 127% on both servos
Servos were not programmed at all, except to narrow the deadband to "1"

Thanks a lot

< Message edited by sillyness -- 4/18/2006 4:03:42 AM >

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RE: 5955 "Stepping" - 4/18/2006 4:14:27 AM   
sillyness



Posts: 2282
Joined: 1/1/2002
From: Demorestville, ON, CANADA
Status: offline 		UPDATE:

I plugged the programmer into the servo and ran it as the same speed I was using on the TX... the same "vibration" or "stepping" is there, though not quite as harsh. I am guessing it is not as harsh due to the lower voltage and speed? I guess I can rule out RX and TX and attribute the trait directly to the servo... normal???

Also... that 127% travel is getting me 35 degrees of throw... well better than 1:1.

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Don't Sweat the Petty Things, Pet the Sweaty Things.

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RE: 5955 "Stepping" - 4/19/2006 1:21:42 AM   
mglavin



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

I haven't noted the odd behavior you noted above.

FWIW: I always "RESET" all my servos when I program with the Programmer in play. I can't say weather or not this is your problem, but it’s worth a try.

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Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to sillyness)
       Post #: 3

RE: 5955 "Stepping" - 4/19/2006 3:36:17 AM   
sillyness



Posts: 2282
Joined: 1/1/2002
From: Demorestville, ON, CANADA
Status: offline 		I got the ailerons going too... they do the same thing. It's almost like the servos are too fast and they are gettting to their next position and starting to stop before they get the signal to go past that.

I flew the plane today for the first time. The 5955s and the IPD RXs felt great. Incredible range check (even with 2 RX )... I finally ran out of room to walk!!! Sweet!!!

Also... the tail didn't even vibrate when the motor was running... VERY tight servos!!! Sweet!

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Don't Sweat the Petty Things, Pet the Sweaty Things.

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RE: 5955 "Stepping" - 11/17/2006 2:05:37 AM   
aviti


 

Posts: 681
Joined: 12/3/2002
From: Ballwin, MO, USA
Status: offline 		I am seeing this exact same thing. When I move the stick for my elevators quickly through the full range of motion, the movement is smooth. When I slow down and give just one direction, either up or down, I get a pronounced stepping vibration. The ailerons will do it as well but not as noticeable. I flew the plane last week and everything was fine but like sillyness I am used to 8611's being smoother.

My elevators move freely and my mechanical set up is 1 to 1 with 130% travel. Do I have an issue?

(in reply to sillyness)
       Post #: 5

RE: 5955 "Stepping" - 11/17/2006 4:23:15 PM   
Panzlflyer



Posts: 1940
Joined: 2/28/2002
From: Goldsboro, NC, USA
Status: offline 		See my post on a new 5985, same thing

(in reply to aviti)
       Post #: 6

RE: 5955 "Stepping" - 11/22/2006 8:36:55 PM   
bob_nj


 

Posts: 3489
Joined: 12/3/2001
From: Vineland, NJ, USA
Status: offline 		Was this ever resolved?

(in reply to Panzlflyer)
       Post #: 7

RE: 5955 "Stepping" - 11/22/2006 8:41:55 PM   
aviti


 

Posts: 681
Joined: 12/3/2002
From: Ballwin, MO, USA
Status: offline
quote:

ORIGINAL: bob_nj

Was this ever resolved?



No, no one ever answered on here. I still would like to know if this is normal.

(in reply to bob_nj)
       Post #: 8

RE: 5955 "Stepping" - 11/28/2006 4:14:38 PM   
aviti


 

Posts: 681
Joined: 12/3/2002
From: Ballwin, MO, USA
Status: offline 		Mike - Any further ideas on this? I reset the servos with the programmer but no help. Do they need to be sent in?

(in reply to aviti)
       Post #: 9

RE: 5955 "Stepping" - 11/29/2006 5:57:50 AM   
mglavin



Posts: 5200
Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline 		I'm going to try and replicate the behavior described above, I'll advise ASAP.

I’ll utilize a MPX IPD and Futaba PCM RX together with a 9Z TX…

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Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

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       Post #: 10

RE: 5955 "Stepping" - 11/29/2006 8:49:26 AM   
XJet


 

Posts: 3451
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline 		Over on **** quite a few folks have also commented on the noticeable stepping apparent on their 5955TGs.

It's also been said that the effect of the stepping is not noticeable in the air.

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RE: 5955 "Stepping" - 12/5/2006 12:11:06 AM   
aviti


 

Posts: 681
Joined: 12/3/2002
From: Ballwin, MO, USA
Status: offline 		I was wondering if I got a couple of bad 5955's so I got 2 more from my LHS and installed them in my elevators. They also exhibit this "stepping". I again checked my surfaces for binding etc and found they move easily. They have not affected flying but if you were to listen to this noise it sounds loud and awful.

Mike - I'd like to know if you have been able to replicate this vibration or "stepping". I am running JR 945 receiver not Futaba by the way.

(in reply to XJet)
       Post #: 12

RE: 5955 "Stepping" - 12/5/2006 2:58:19 PM   
mglavin



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

I simply haven't had the time to perform my tests yet, maybe later today. I don't have any input on the possibility of your servos being ill, as others are suggesting similar behavior too without problematic behavior.

I don't recall this stepping syndrome in our models. Perhaps observing the servo(s) working on the bench, in a protractor jig and installed in a stab while affecting user specific parameters will reveal something.

_____________________________

Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to aviti)
       Post #: 13

RE: 5955 "Stepping" - 12/5/2006 11:13:01 PM   
SteveRoss


 

Posts: 28
Joined: 11/29/2004
From: Mesa, AZ, USA
Status: offline 		I have 2 5955's on my 50cc Yak elevators... -overkill!!!- each is on a separate channel of a Futaba 9 ch. pcm rx -slaved- . I have not noticed any stepping or slowing and both operate in perfect union. I will be duplicating this setup on a 50cc Extra... hope it still works as well.

(in reply to mglavin)
       Post #: 14

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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 >> 5955 "Stepping"
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