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09-10-2006 11:16 PM  14 years ago
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loewermx

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Alexandria, La

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Maxi Joker Flies!
Well, after fighting with some serious ESC issues, it flies. I must say, this being my first big electric, it is kindof a weird feeling. I am so used to hearing an engine and seeing smoke. This thing has GOOBS of power. I never did any power climbouts but it feels very light and nimble. My setup as of now is:

Actro 24-5
Kontronik 55-10-32
Tanic 5s3p 7500's (pair)
TG800 semis

I do have one question also, When I tried to spool it up a 3rd time it started but then made a grinding noise. The motor stopped spinning and the pinion stopped also. What would cause this? I checked the bolts on the pinion and they are tight.

Scott
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09-11-2006 08:17 PM  14 years ago
Notar

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Taxachussetts

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Scott
If you are just starting the heli using the throttle stick, start it up by pushing up the trim lever instead until it catches, then move the trim to full, then fly. Sounds like you may be overamping the controller. glad to see it was the controller<G>
Joe
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09-11-2006 08:41 PM  14 years ago
loewermx

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Well, I was switching into idle 1 which is at 85% Normal is at 0 across.

What would cause the grinding sound? It sounds like a gear stripping. But both the motor and pinion stop turning, thats when the sound starts.

Any thoughts?
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09-12-2006 04:39 AM  14 years ago
BungeeMike

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Honolulu, Hawaii

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Thats a dishearting sound to hear when you are on your first job and have 3 left to go. What is happening is the motor is cutting out due to too much power then it makes that noise. Do as recommened above with the trim count your clicks its easy to over shoot,stop the minute you see movement or install the govenor board which is what we did although some dont like it it works well for us. Bring the stick to below half and listen to that beatiful spool up sound. My thoughts
Aloha
Bungee
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09-12-2006 07:29 AM  14 years ago
JohnC

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East Yorkshire, England

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I had a Kontronik 55-10-32 with an Actro 24-5 which would occasionally do the same thing. It worked fine the first time, but sometimes on a second spool up it would refuse and make this strange noise. If it does it again, look at the ESC and see if the status LED is flashing 6 times.

Eventually it went completely and wouldn't spool up at all.

I sent it back to Kontronik and they refused to honour the warranty. They said the ESC had been abused - but it only ever had an easy life on my Joker-2.

JohnC.
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09-12-2006 01:26 PM  14 years ago
Notar

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If that is how you are starting it, you are overamping it. Use the throttle trim, and it should work fine.
Joe
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09-12-2006 03:25 PM  14 years ago
JohnC

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Joe,

The kontronik has a very soft start - not like some of the Schulze controllers I've seen in the past. The motor spools up very gradually even if you switch straight into idle-up.

Are you sure this is an issue ? - if the motor was being overamped then I would expect some sort of violent movement ??.
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09-12-2006 03:35 PM  14 years ago
loewermx

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Alexandria, La

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Well, it does it just about everytime I try to spool up now. Even with the blades already spinning, the motor will start and then make the noise. I never know when it will work and when it won't. I am curious to know if I am using extra power while flying because of this.
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09-12-2006 04:00 PM  14 years ago
Notar

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I have always used the throttle trim to start the heli, then give full trim as this acts as sort of a mini idle up, so when i give full low throttle, the motor does not stop. I do not like flipping switches, and do not need idle up with my flying style. If you start the heli this way, then flip into idle up, it would work the same way without overamping the motor or controller.
Joe
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09-15-2006 07:15 AM  14 years ago
JohnC

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East Yorkshire, England

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loewermx,

I'm curious whether your ESC is having the same trouble mine did.

When it makes this noise, does it still spool up - or does it just stop ?.

Next time, can you look at your ESC straight afterwards and see if the red LED is flashing ?. If so, how many times ?.

Mine did it with increasing regularity then stopped working altogether.

JohnC.
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09-15-2006 09:35 AM  14 years ago
BungeeMike

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Honolulu, Hawaii

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john
if its the noise i think it is it starts to spool then cuts out, just starts to get spinning the weeezeee and stops. We had the actro 70-32 then upgraded to the 80-32 but both did the same thing unless you brought the trim up to the point, had to reset once in a while when it did it
Bungee
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09-15-2006 10:10 AM  14 years ago
JohnC

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Mike,

mmm - it sounds a bit different.

Mine wouldn't even start to spool - no matter how slow I ramped the throttle.

It kind of vibrated and made a noise a bit like a digital servo which is binding.

If I left it for an hour or two it would start to work again until it finally crapped out altogether.

Now I think about it, I have seen the symptoms you describe before too on my Logo-14. I figured it was the soft start thinking the blades were not rotating freely enough and cutting out for safety reasons.

JohnC.
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09-15-2006 02:02 PM  14 years ago
loewermx

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Alexandria, La

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Yes, it does stop when it makes the noise, almost like a gear stripping. I don't think the LED flashes but I will check to make sure. I am making a few changes to to the setup of the machine right now but I plan on flying it again this weekend. I will update when I get to fly it agian. I was going pretty quick with the trim so that was most likely the cause.

Scott
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11-08-2006 01:58 PM  14 years ago
phover

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Joliette, QC, Canada

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Hi Scott,

Have you solve the problem? I have the same setup as you (listed in your first post) and the same problem too My heli is a Maxi Joker 1.

I know someone that change his motor for a 34-2 on his maxi and that solved this issue.

I have an old Actronic 70-32 controler here somewhere... I was using it before the kontronic with no problems. I like the Jazz for it's simplicity, but just wondering if I won't broke my ESC and motor if I continue to let my motor "grind" at startup...

Let me know...

A+
Mart
photo-vertige.com
ps. Sorry for my poor english
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11-08-2006 02:42 PM  14 years ago
loewermx

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Alexandria, La

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Well, I sort of have it fixed. I have switched to using the throttle trim to get the motor going. Run the trim up VERY slowly until it sounds like the motor "switches gears"

Then its good to go.

Scott
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11-08-2006 03:04 PM  14 years ago
pyaresquared

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Central Arizona

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The grinding noise sounds like the same sound I was getting from my Pletti/Schulze after a pine tree landing (see previous post). I think the motor over-amped while it was twisting the flybar into a pretzel in the pine tree, and when I was ready to fly again, I couldn't get the motor to restart properly. I eventually decided that the grinding noise was caused by the magnets in the motor jerking the rotor to a stop. It was not a mechanical problem.
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11-08-2006 08:53 PM  14 years ago
cfranks

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Adelaide South Australia

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The same noise occured on my Joker. The fan on top of the Plettenberg HP370 came loose on the shaft and was rubbing on the underside of the motor shroud.

Charles
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