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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsV-Bar › Help Help Help.. I think I have a Sensor Problem!!
12-26-2010 04:24 PM  9 years ago
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Tolly

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Derby, UK

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Help Help Help.. I think I have a Sensor Problem!!
Hi Guys

Had the full size V5 Pro blueline fitted to my nitro aurora since its released earlier this year. My problem started earlier this week when on spool up the heli started to jump a little so stripped it down to check all connections and wires for chafing and found no problems. Went out today to test it again and as soon it reached a good head speed it jumped and smashed into the ground . So I connected it to my laptop to read the log and found I have been getting Aileron Sensor Value out of Range! Could this be a defective sensor?

Any help here would be appreciated

Thanks
John
Avant Aurora....
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12-26-2010 04:27 PM  9 years ago
MrMel

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Gotland

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You get sensor out of range if heli moves too fast.

Faulty sensor would render other things if memory serves me correct.

Post a copy of the full event log.

Is the sensor cable going into the VBar secured?
Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more
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12-26-2010 05:06 PM  9 years ago
Tolly

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Derby, UK

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Thanks MrMel

The cable from the sensor into the main unit is secure I use hot melt glue to secure it

Below is the description of the error message, that's what made me think of a fault sensor...

The Sensor delivers Values that are not trustful. Rotational rates, that will create this values are
usually not possible in air. The Sensor may be defective. This can happen in certain cases if the heli is
handleled on ground, or on very hard landings or very extreme Vibrations.

Do you have an email address so I can send you the event log

Thanks again
John
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12-26-2010 05:56 PM  9 years ago
Tolly

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Derby, UK

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log file sent...

Cheers
John
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12-26-2010 06:06 PM  9 years ago
MrMel

rrProfessor

Gotland

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Nothing in the log really except sign of the extreme movement.
If I would have guess I would have guessed a bad RX cable giving bad input when vibration raises.

Other than that it can of course be a bad solder in the unit somewhere, only way to detect that is to send it in for a checkup, you can refer this thread but do Email before you send it in to get a RMA ok.

I would try different RX cables first though, especially if you use Spektrum satellites, in a thread over at HF many (way too many to feel good) had experienced satellite cable failures, most did not know it since Vbar switched automatically but when tested on the bench (wiggle) they found it.
Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more
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12-26-2010 06:53 PM  9 years ago
Tolly

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Derby, UK

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I can't seem to simulate the problem on the bench by wiggling satellite wires so I will send the unit back for inspection.

Thanks again MrMel

Cheers
John
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12-27-2010 10:13 PM  9 years ago
Jeff polisena

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westpalmbeachflorida usa

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If you get any loose connections with any component on heli this could happen . I had a bad sensor do this ,I dont want to jump to sensor but if you wiggle all connections on bench and nothing jumps or moves erratically then my bet is sensor .I have sensors get hyper sensitive sometimes so when I'm flying heli unstable feels like I have gains turned to max.I stole it ,flew it and gave it back ;)
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12-28-2010 12:20 AM  9 years ago
Mojave

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Palos Verdes, Ca. USA

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I had a bad satellite connection earlier this year. Luckily I was running 2 sats. I swapped out the sat cable and the problem went away, but since then I hot glue all cables to the unit as a fail safe. Just my .002All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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02-08-2011 05:07 AM  9 years ago
Tolly

rrApprentice

Derby, UK

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Just a little update.. I sent the vbar back to mikado and they reported no problems with the sensor or the main unit, so out with all the servo's to double check wire for chafing and again all fine. On the rebuild I started the engine just to check the tick over and then raised the rpm to create a little vibration, I found that one of the servo's started to jump about like mad. Replaced the servo and normal flying has resumed.

so no problem with the vbar just a bad servo..

I would like to thank MrMel for your help and mikado for a top class customer service.

Cheers
John
Avant Aurora....
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