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T-REX 600 › Another Trex 600 glitching thread...
09-17-2007 05:31 AM  10 years agoPost 1
c130pilot

rrApprentice

Windsor, CO

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Well I got the Trex 600 airborne a couple days ago. Love the way it flies! Did have some problems with glitching, though. A little scary! It happened real fast 2 or three separate times... at first, I thought it was just me, then the last two a few minutes later made me realize it was definately a problem. It happens quickly, but basically feels like it just "skips" for a split second - motor cuts and everything.

After this, I read several posts on the issue and did the following:

Re-routed and cleaned up all wiring. Ensured motor and motor wiring are well separate from r/f components and wiring. Lightly sprayed belt with silicon spray. Re-routed antenna.

My setup is all stock Trex 600CF with 600L motor running TP 4900's. I'm using FM.. not PCM and not Spektrum! (And please don't tell me to go spektrum... I know lot of guys are using these with 72mhz and doing just fine... someday when I can switch out all my downlinks I'd love to try Spektrum! Smiley ).

After the re-work, I flew it through 2 battery packs. It flew much better, but I still got one glitch on each flight. Once in a hover, and once in mild forward flight during a turn.

Ideas?

Tim

Help! I'm umop apisdn

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09-17-2007 05:31 AM  10 years agoPost 2
c130pilot

rrApprentice

Windsor, CO

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Also, I do have a ferrite ring installed on the throttle channel lead.

Tim
.

Help! I'm umop apisdn

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09-17-2007 10:08 AM  10 years agoPost 3
Olivier31

rrApprentice

France

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Hello,

you should use PCM modulation.

Regards

Olivier

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09-17-2007 11:10 AM  10 years agoPost 4
i8urls6

rrApprentice

Troutman, NC

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What model reciever is it, and where is it located? Also how do you have your antenna routed? You should consider a mini antenna if your not already using one.

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09-17-2007 03:49 PM  10 years agoPost 5
murp

rrApprentice

Nova Scotia, Canada

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I second the mini-antenna, sometimes routing the long antenna can get you into trouble. The mini-antenna can easily be mounted so that it is away from the heli.

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09-17-2007 05:37 PM  10 years agoPost 6
pgoelz

rrVeteran

Rochester MI

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FWIW, I had the same trouble with a used Trex 450SE I bought and flew initially on 72MHz. Every minute or two the motor would cut for about 500mS. I think I had control during the motor cutout but I can't be positive. The motor always restarted and it never resulted in a crash. I could never find the problem so I took it as an excuse to switch to Spektrum. To my amazement, switching to Spektrum made it a lot better but it DID NOT cure it totally. I still had a very occasional motor cutout.

At about the same time, I sprayed the tail belt with silicon and discovered two moderately bad mainshaft bearings and replaced them. The motor cutouts vanished totally and have never returned.

Not sure if the bad bearings applies to your new heli and you say you sprayed the tail belt...... so not sure what else to say. Other than I feel your pain It sounds like something is injecting noise into the throttle signal to the ESC and confusing it sufficiently to cause it to shut down. It might be interesting to ask the ESC manufacturer exactly what could cause a short duration shutdown and restart without going through an initialization (which would likely leave the motor OFF until the throttle was lowered).

Paul

Paul Goelz
Rochester MI USA
http://www.pgoelz.com

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09-17-2007 08:44 PM  10 years agoPost 7
helimatt

rrElite Veteran

Lafayette, IN

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Need more info on the PPM receiver you are using. Basically, some RX's work better than others in these applications, and experimenting more with antenna location and type (base loaded).

In the end, I went PCM receivers on my Trex 450 and My 600. Until very recently, no problems at all.

Last Saturday had two lockouts (I think they were) on the 600- very alarming and almost caused a crash as the second one was sustained and I was inverted at the time.

Examining the heli, I found one of the carbon/metal ended boom supports with a screw slightly loose. Tightened them, and improved the antenna isolation from where it crosses near the boom support.

6 more flights no more lockout issues.

Never, ever, ever, ever give up.

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09-18-2007 02:10 AM  10 years agoPost 8
c130pilot

rrApprentice

Windsor, CO

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Thanks for the replies...

I want to avoid going PCM with a problem and then getting a lockout I can't recover from.... however, since it's almost entirely glitch free, I might go ahead and run with the PCM now.

The RX I am currently using is a Futaba FP-R168DP 8channel RX... brand new. No mini antenna, just the stock one - it's not touching anything anywhere except part of the skids.

Tim
.

Help! I'm umop apisdn

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