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HelicopterMain Discussion › SERVO GLITCHING
01-28-2017 11:42 PM  9 months agoPost 1
ch53jay

rrNovice

Capitol City, Cali

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I have RJX XTREME 90 GASSER and have brand new spektrum ar8000 receiver with satellite, futaba gy401 gyro,all hitec hs645mg servos and spektrum dx7 transmitter, a brand new 5 cell 1800 ma nimh battery pack and I am having a glitch problem one one channel at half collective and higher only.I just got my dx7 tx back from spektrum and they tested it and had no problems. I just bought a hitec x1 pro pack charger with powerbox.I have been flying this package for a long time and just recently after buying the new receiver and battery still having glitch only on one servo and have checked the condition of the wires and the wire sheathing, I switched the aileron servo with elevator servo and still only having glitch on the one channel.I have never balanced the batteries and am hoping that this could be the problem. Does anyone have any opinions or suggestions. Thanks ch53jay

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01-29-2017 12:10 AM  9 months agoPost 2
Heli_Splatter

rrElite Veteran

USA

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Try creating a new model, binding and doing the swash setup on the new model. Does it continue to have the glitching?

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01-29-2017 12:39 AM  9 months agoPost 3
BeltFedBrowning

rrKey Veteran

Kansas City

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Since it is half collective and higher, is it notchy mainshaft bearings? Had it happen to me once. Ruined two sets of blades before I figured it out.

perfer et obdura; dolor hic tibi proderit olim

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01-29-2017 12:53 AM  9 months agoPost 4
ch53jay

rrNovice

Capitol City, Cali

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The RJX is brand new and i only have about 1 hour of flight and 2 hours of spool up. I will try creating a new model.I have not spooled up or flown since new battery and have not charged or balanced old or new batteries yet either. Thanks for the suggestions....Anyone else have some recommedations???

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01-29-2017 11:51 AM  9 months agoPost 5
ICUR1-2

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Ottawa, Ontario

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Try it with a fully charged battery made that mistake once thinking it was the RX plus try another RX if it persists after trying a new TX model

spending time, paying attention

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01-29-2017 12:34 PM  9 months agoPost 6
JuanRodriguez

rrProfessor

The Villages,​Florida

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You can cycle your new battery to make sure it's ok , even if new......

I'm not aware of any way to "balance" a NiMh and unless I missed something over the years. I've not heard of the need to balance that battery chemistry......

Aside from what has been suggested, the next easiest thing to try is to swap out the receiver with another known good receiver......

Been there, done that and old enough to know better.....

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01-29-2017 04:34 PM  9 months agoPost 7
Four Stroker

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Atlanta

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Not enough information. What is glitching to you ? On the bench or flying ? Is this 1800 mAh NiMH pack made out of AA cells ?

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01-29-2017 04:45 PM  9 months agoPost 8
dkshema

rrMaster

Cedar Rapids, IA

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One servo, at limited positions. Most likely a bad servo, could be a dirty pot inside. Swap it with one of the other two, see if the problem follows the servo.

Uh oh. You already did that

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-29-2017 06:02 PM  9 months agoPost 9
MOZENZ

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Denby Dale UK

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Not sure but I think those servo's are not Digital. CCP heli must have Digital servos. Been there when I built one for somebody who supplied the servos.

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01-29-2017 06:09 PM  9 months agoPost 10
BeltFedBrowning

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Kansas City

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I have built and flown dozens of helis on CCPM with non-digital servos. Running my Eco 8 on 120 degree CCPM with HS-81s. Been fine for the last 12 years. Perhaps you are thnking FBL? Is it just a Spectrum thing?

perfer et obdura; dolor hic tibi proderit olim

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01-29-2017 06:12 PM  9 months agoPost 11
heliraptor10

rrKey Veteran

kokomo, in-US

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You do not have to have digital servos.

Dozens of people on here using analog servos on ccpm helis.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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01-29-2017 08:23 PM  9 months agoPost 12
ch53jay

rrNovice

Capitol City, Cali

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Hey everyone thanks for your suggestions, i have flown analog servos foe 12+ years in my predator never any issues and reciever is brand new and the battery is also 0 hours on both now im just waiting to get my pro charger to charge the battery because the charger i have is very old so hopefully this is a voltage or power issue. One other question i might have will carbon fiber effect the signal to the servo causing a glitch. Thanks for all your help, Jarrid

HERE TO POLLUTE THE LIBERAL AIR WITH MY GASSER

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01-29-2017 08:29 PM  9 months agoPost 13
dkshema

rrMaster

Cedar Rapids, IA

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CCP heli must have Digital servos.
Don't let all of us who flew CCPM helis with analog servos before digital servos were invented tell you you're wrong, but you are.

The majority of flybarless controllers, however, expect digital servos, regardless of swashplate configuration. This fellow isn't flying flybarless.

And, no, it's not just a "Spektrum thing" -- whatever that means.

Back to the OP. Disconnect your servo linkages from the servos. See if the glitch us still present.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-29-2017 09:26 PM  9 months agoPost 14
ch53jay

rrNovice

Capitol City, Cali

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Ok i will try that but may i ask what this will help me notice or recognize.

HERE TO POLLUTE THE LIBERAL AIR WITH MY GASSER

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01-29-2017 09:54 PM  9 months agoPost 15
ch53jay

rrNovice

Capitol City, Cali

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Glitch happens after spool up and just before takeoff and it happens intermittently and not on the bench. Again thanks for all your help and suggestions, Jarrid

HERE TO POLLUTE THE LIBERAL AIR WITH MY GASSER

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01-29-2017 09:57 PM  9 months agoPost 16
Heli_Splatter

rrElite Veteran

USA

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It will help to see if there is a mechanical problem preventing the servo from moving freely. I would also say that battery voltage can cause glitching. It does not take a fancy charger to charge these batteries and a volt meter will quickly tell you if there is a problem. If you don't have one of those Harbor Freight has some inexpensive ones for sale. This is a basic tool needed to fly anything with batteries.

I suggested to set it up as a new model to make sure that there was not a programming issue causing the problem.

Yes carbon fiber can block RF signals, that is why we usually have two antennas on the aircraft.

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01-29-2017 10:04 PM  9 months agoPost 17
ch53jay

rrNovice

Capitol City, Cali

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Ok i will do what you have suggested. In regards to my RJ X where is the best place to put the satellite receiver I currently have it mounted in the front underneath the battery holder and I will take a picture later and post it so you may see or have any suggestions of where to move it to or its proper placement

HERE TO POLLUTE THE LIBERAL AIR WITH MY GASSER

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01-30-2017 03:00 PM  9 months agoPost 18
Heli_Splatter

rrElite Veteran

USA

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Think of it this way, what is the best position for the receiver/remote so that the antenna is not blocked when the aircraft is flying? I install the remote low on the aircraft so that it is exposed to the radio waves from beneath. The instruction's state that one set of antennas should be 90 degrees offset from the other.

You can buy a Spektrum frame loss recording device rather cheaply that will tell you if you are having reception problems. Not sure what radio you are flying.

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02-08-2017 12:54 PM  9 months agoPost 19
dkshema

rrMaster

Cedar Rapids, IA

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This is a gasser, I am surprised no one has told you to look into making sure your ignition system isn't acting up.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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02-08-2017 02:14 PM  9 months agoPost 20
Richardmid1

rrProfessor

Leeds, England

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I had a similar thing on a 450, swapped servos 3 times but was always the same servo/channel! It would also only do it on spool up just at take off rpm!

Unfortunately I never figured out what it was! However it could have only been static electric discharge going to the RX which must be hitting the same channel (shortest path) every time.

As Dave said check your ignition system, tail belt (you may need to add an anti static wire), and check for loose, dry or notchy bearings.

60% of the time, it works every time!

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