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T-REX 450 › align 45 amp speed control question
02-23-2014 04:30 AM  3 years agoPost 1
onebigjunker

rrKey Veteran

Wellsville, Ks

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is there anything special I need to do to this 45 amp speed control to work on 3S instead of 6S?
My motor and speed control are getting hot and shutting off on my!

work hard, play even harder!!!!
Team Empire Hobby/GAUI USA

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02-23-2014 04:56 AM  3 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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This speed controller from the 450L Dominator kit?

No, there is nothing you need to do if you want to run 3S instead of 6S...but what motor are you running with it, how many teeth on the pinion, and in which helicopter?

What are your throttle curve settings?

-----
Dave

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

Team Heliproz

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02-23-2014 05:24 AM  3 years agoPost 3
onebigjunker

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Wellsville, Ks

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i have a 3500 kv motor wtih 12 tooth pinion, and it is in an gaui X3, my throtle curve it 0,70,75, spins up and run for a bit, seem to get hot and shuts off making a wierd noise

work hard, play even harder!!!!
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02-23-2014 05:32 AM  3 years agoPost 4
drdot

rrElite Veteran

So. California, Orange County.

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fwiw..

3500 Kv is a 3s motor...Go to 3s, 11 t pinion, run 100% throttle . Work fine, last long time....

John.

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02-23-2014 01:57 PM  3 years agoPost 5
onebigjunker

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Wellsville, Ks

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I am running a 3S 2200 battery now!

work hard, play even harder!!!!
Team Empire Hobby/GAUI USA

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02-24-2014 03:08 PM  3 years agoPost 6
Richardmid1

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Leeds, England

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Could be a faulty motor. Dead li-po maybe?

60% of the time, it works every time!

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02-25-2014 04:41 AM  3 years agoPost 7
drdot

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So. California, Orange County.

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Fwiw...

The 75% throttle may be the culprit....drop a tooth on the pinion, go to 90-100% throttle.....

John.

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02-25-2014 04:48 AM  3 years agoPost 8
dkshema

rrMaster

Cedar Rapids, IA

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and shuts off making a wierd noise
Figure out where THAT's coming from...bad motor bearing perhaps?

-----

OK -- what speed control are you using, and how do you have it set up?

-----
Dave

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

Team Heliproz

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02-25-2014 10:28 AM  3 years agoPost 9
Richardmid1

rrProfessor

Leeds, England

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70-75% throttle is kind of low but it sounds like hes just trying to hover the thing so it should be fine at that. However if he isn't going to be doing 3D anyway he would benefit from dropping to a 11T pinion just to keep things cooler and get longer flight times.

I'm with Dave on the bad motor bearings maybe or even gear mesh being too tight?

60% of the time, it works every time!

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02-25-2014 11:25 AM  3 years agoPost 10
onebigjunker

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Wellsville, Ks

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it is a align 45 amp dominator esc, motor was brand new(doesn't mean anything), just was trying to hover and check my tail setup on my vbar, I have ordered new ecs and another moter, should be here in a couple of days we will see

stock setup, why it come from factory

work hard, play even harder!!!!
Team Empire Hobby/GAUI USA

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02-25-2014 11:36 AM  3 years agoPost 11
Richardmid1

rrProfessor

Leeds, England

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It could be the bec over heating causing it to shut down. This could be caused by a faulty servo drawing too much current. You could try adding a separate bec and disconnecting the middle red wire from the esc to the rx/fbl unit to eliminate the onboard bec.

60% of the time, it works every time!

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02-25-2014 05:52 PM  3 years agoPost 12
helicoptermike

rrNovice

ontario,ca-usa

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Check the timing. Incorrect timing can make things heat up.

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03-02-2014 04:48 PM  3 years agoPost 13
es1co2bar3

rrKey Veteran

winnetka california

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Kinda impossible that your running hot with that low of rpm, but my Dominator cut out twice with the same ESC but my rpm was crazy chicken power 6s setup, and i was thinking the timing was off so I reprogram
the esc, and it was fine after that.

I was waiting on some honey but there aren't no Queen bee,

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03-02-2014 11:23 PM  3 years agoPost 14
wc_wickedclown (RIP)

rrProfessor

long beach calif

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make sure the pinion is not to tight up against the main gear

good thing to check recommended from my buddy esco if this is the case you can thank not me

Insha Allah made in america

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03-03-2014 12:22 AM  3 years agoPost 15
RudeRebel

rrNovice

Whitby, Ontario - Canada

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So the 3500 kv motor is not a dominator motor, just a 450 motor rated for 400 watts so at 3S would be 400/11.1=36A continuous.

The dominator come in old and new versions for 6S and 3S.
6S old is 1700kv for 650w continuous for 30A
6S new is 1800kv also for 650w continuous for 30A
3S old is 3400kv for 500w continuous for 45A
3S new is 3200kv also for 500w continuous for 45A

The 3S max wattage is 730 which would mean the motor is capable of drawing 65A.

As you can see, at 3S using the dominator 3S motor, you are right up against it if you are using the Align 45A ESC.

Onebigjunker, out of curiosity, are you using the built in governor on the ESC? Also, are you using the built in BEC?

As Richardmid1 mentioned, if you are using the internal BEC on that ESC, depending on the servos you are using, the internal BEC is not really that powerful and could be contributing to your issue.

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03-03-2014 12:34 AM  3 years agoPost 16
RudeRebel

rrNovice

Whitby, Ontario - Canada

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onebigjunker... One other thing you may want to check... I watched a video some time back where a guy demonstrated that if the screws used to mount the motor to the motor mount are too long, it can cause a short in the motor which causes a huge current draw. Just a shot in the dark but you may as well check it as your ESC/motor/pinion combination in theory should have been okay.

And as others here have mentioned, you need to check the timing set on the ESC. Too high and you will definitely generate heat.

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03-03-2014 12:46 AM  3 years agoPost 17
knightofcarnage

rrElite Veteran

chicago

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You are talking about MrMel videos.

http://heli.dacsa.net/MrMelSite/index.html

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03-03-2014 02:05 AM  3 years agoPost 18
RudeRebel

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Whitby, Ontario - Canada

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Thanks, knightofcarnage, that is exactly the one.

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03-03-2014 03:56 AM  3 years agoPost 19
onebigjunker

rrKey Veteran

Wellsville, Ks

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motor screws are fine not draging, 3500kv motor is not align ecs says 2-6S 45 amp align don't know how to tell if it is oldor new, I am running ds410m align servos

work hard, play even harder!!!!
Team Empire Hobby/GAUI USA

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03-03-2014 04:19 AM  3 years agoPost 20
RudeRebel

rrNovice

Whitby, Ontario - Canada

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My reference to new and old was referring to the motor choices for dominator motor. The math provided was just to show what the current draw would be for the different motors. As you can see, at 6S, using one of the 6S motors, the Align 45A ESC should have been ok. At 3S, your running at the limit if using one of the dominator 3S motors. What brand and model is the 3500kv motor you were using?

Be sure to check gear mesh and timing. May be too late if you've already dis-assembled but I like debugging electronic mysteries.

If you have a multimeter handy, I would be curious to know what resistance of the motor measures. May provide a clue into whether or not the motor was bad.

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T-REX 450 › align 45 amp speed control question
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