Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: [1] 2 3 4   Go Down

Author Topic: OK so what am i doing wrong???  (Read 15468 times)

whiskeyfrank

  • Guest
OK so what am i doing wrong???
« on: August 17, 2008, 01:39:53 AM »

Ive wired up my electrics as per the diagram so whats wrong??

There must be something wrong because ive gone through 2 ESCs without even getting 2 seconds on the motor.

Each time i switch it on i get 1/2  second movement from the motor then nothing else, the esc just wont move the motor, i am presuming im blowing the esc's but ive done 2 now. The esc is 110amp so should at least turn the motor.

Whats wrong with my wiring. Im not doing any more yet as its just too plain expensive to keep buying esc's.

Ans i thought nitro was expensive, if this is right then im going back to nitro!!!!!!!!!!

Any one want to buy some batteries chargers wiring and motor - never used????????????????
Logged

Proteus

  • Guest
Re: OK so what am i doing wrong???
« Reply #1 on: August 17, 2008, 01:48:24 AM »

what ESCs is it , and is it a 12v one  and has it got a bec?  Oh and the size of use.


Proteus
Logged

geoff p

  • Guest
Re: OK so what am i doing wrong???
« Reply #2 on: August 17, 2008, 02:24:20 AM »

Does your rudder servo work?
That's a quick way to find if the receiver is powered properly.

I had similar problem because of my lack-of-knowledge: the BEC was fighting against the receiver's battery supply.  Big Whoops!  Occasional twitches from motor but that was all.
The shop told me to remove the separate receiver battery pack, the BEC would do the job. That ended that problem.

I'd also suggest trying with a single battery - 6V rather than 12V - and work things out without risk of blowing ESC or anything else.  120 Amps is ample capacity (at 6V x 120 Amps = (nearly) 1 horsepower.)

Geoff
Logged

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 19,097
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: OK so what am i doing wrong???
« Reply #3 on: August 17, 2008, 06:31:56 AM »

Is there a smell of burning?
Can you take a photo of the setup?
Also, try it on one battery, 6volts first
.
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

barryfoote

  • Guest
Re: OK so what am i doing wrong???
« Reply #4 on: August 17, 2008, 09:05:57 AM »

Contact FLJ at ACTion. He will sort it for you. Personally, I am not sure about the motor wiring, but then I never use two batteries...

Barry
Logged

whiskeyfrank

  • Guest
Re: OK so what am i doing wrong???
« Reply #5 on: August 17, 2008, 01:32:53 PM »

the esc has a bec and im not using a seperate battery pack.

Ill try and get a picture.

Ive tried with one battery and the same happens.

There is no smell of burning.

who is FLJ and ACTion??

Thanks everyone
Logged

barryfoote

  • Guest
Re: OK so what am i doing wrong???
« Reply #6 on: August 17, 2008, 02:13:24 PM »

the esc has a bec and im not using a seperate battery pack.

Ill try and get a picture.

Ive tried with one battery and the same happens.

There is no smell of burning.

who is FLJ and ACTion??

Thanks everyone

FLJ is only the most famous elctronics chappy on the forum (Well he thinks so but we all credit Wombat with the real brains ha ha). Do a search for members on the forum and send him a Pm or look at his website and send him an email.  Very approachable, friendly guy..

This is the web page.

http://www.action-electronics.co.uk/
Logged

DickyD

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,497
  • www.srcmbc.org.uk
  • Location: Southampton UK
    • SRCMBC
Re: OK so what am i doing wrong???
« Reply #7 on: August 17, 2008, 02:17:00 PM »



FLJ is only the most famous elctronics chappy on the forum (Well he thinks so but we all credit Wombat with the real brains ha ha). Do a search for members on the forum and send him a Pm or look at his website and send him an email.  Very approachable, friendly guy..

This is the web page.

http://www.action-electronics.co.uk/
OK Barry, give, what electronic goody are you after now ?  ;)
Logged
Richard Solent Radio Controlled Model Boat Club http://www.srcmbc.org.uk

DickyD

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,497
  • www.srcmbc.org.uk
  • Location: Southampton UK
    • SRCMBC
Re: OK so what am i doing wrong???
« Reply #8 on: August 17, 2008, 02:20:55 PM »

Definitely could do with photo of all wiring including Rx. O0
Logged
Richard Solent Radio Controlled Model Boat Club http://www.srcmbc.org.uk

Bunkerbarge

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,359
  • Location: Halifax, UK
Re: OK so what am i doing wrong???
« Reply #9 on: August 17, 2008, 02:44:05 PM »

What size fuse is fitted and does the motor turn freely by hand?
Logged
"Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days"

whiskeyfrank

  • Guest
Re: OK so what am i doing wrong???
« Reply #10 on: August 17, 2008, 02:45:38 PM »

photo coming but ive taken all the wire out for now.

The motor turns fine its new and tested.

15 amp fuse - not blown tested
Logged

barryfoote

  • Guest
Re: OK so what am i doing wrong???
« Reply #11 on: August 17, 2008, 03:20:32 PM »



FLJ is only the most famous elctronics chappy on the forum (Well he thinks so but we all credit Wombat with the real brains ha ha). Do a search for members on the forum and send him a Pm or look at his website and send him an email.  Very approachable, friendly guy..

This is the web page.

http://www.action-electronics.co.uk/
OK Barry, give, what electronic goody are you after now ?  ;)

Dave,

What a suggestion.......I'm really hurt...Got all I need......FOR NOW!!!! O0 O0
Logged

DickyD

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,497
  • www.srcmbc.org.uk
  • Location: Southampton UK
    • SRCMBC
Re: OK so what am i doing wrong???
« Reply #12 on: August 17, 2008, 03:39:24 PM »

Dave who, too much sun is it Barry ?  :-\
Logged
Richard Solent Radio Controlled Model Boat Club http://www.srcmbc.org.uk

John W E

  • I see no ships !!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,504
  • Location: South shields
Re: OK so what am i doing wrong???
« Reply #13 on: August 17, 2008, 04:07:36 PM »

whiskeyfrank  hi there

May I enquire as to what make of speed controller you are using?

The other think I can only think of for the time being is; when you come to switch everything on, are you switching your transmitter on first?   Followed then by your receiver, and then, your main battery?   Or, if you are using BEC are you switching your main battery on.

The reason I am saying this is, a lot of speed controllers now use a PIC/or a processor and what this basically does is search for a signal - from the transmitter.   If it doesnt receive a signal, it may go into a 'shut down' mode.   

Dont know if that may help.

Aye
john e
bluebird
Logged

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 19,097
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: OK so what am i doing wrong???
« Reply #14 on: August 17, 2008, 04:52:16 PM »

Good point John, check the sequence for turning things on in the speed controller
instructions, we've ALL been caught by that old chestnut! Also, have you tried the
motor direct onto the batteries?
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

barryfoote

  • Guest
Re: OK so what am i doing wrong???
« Reply #15 on: August 17, 2008, 06:18:38 PM »

Dave who, too much sun is it Barry ?  :-\

Richard or Dave or whatever you are called. O0......Don't know where that came from!!!!!Maybe FLJ as in dave Milbourn........Mind must be going......Boy it is warm here... 8)
Logged

barry park

  • Guest
Re: OK so what am i doing wrong???
« Reply #16 on: August 17, 2008, 06:32:55 PM »

Nice picture.... I think you've enough to blow a 15 A fuse in 2 secs.
Long term........
Your running a 700 motor on 12 volt ?? What sort of prop and what reduction gear ratio?
Do you know what shaft revs you'll get with your prop at full throttle?
Do you know what current drain,power output,efficiency that will give?

Checklist........
Is the prop in water and the fuse still intact?
What does ESC instructions say about protection mechanisms ? (thermal ,current limiter,torque control)
What does setup do with a bulb instead of a motor?
Is it one of these stupid ESC's that you have to switch on in sequence?
What do ESC indicator lights do ?
Manufacturer and model of esc ? Same goes for receiver?
How long will your switch last and does the esc not have a bec enable loop for switch disabling?
Is switch suppressed?

Eliminate being plugged into a third channel with a two channel Tx.....
What does servo in ESC channel do if you plug ESC to rudder channel ?

Eliminate BEC cutout............
What is the allowable current load on the bec?
Can bec handle the (Vin - 5) x (load current) power ? i.e. is bec on a heatsink?
What is upper voltage limit?
What does servo in other channel do?
Logged

whiskeyfrank

  • Guest
Re: OK so what am i doing wrong???
« Reply #17 on: August 17, 2008, 07:02:58 PM »

ive took all the wiring out (hence ive mocked up what i had) so i can finish the hull.

wow so many questions. so little knowledge!!! (me that is)

yes the sequence is correct
fuse is intact
motor spins with battery direct
no idea about the esc, told it was suitable by mdel shop, came with little instructions, Model shop not helpful
futaba gear apart from esc
rudder servo works fine
checked the output using a meter and nothing from the esc (bulb check)
switch is rated much higher

i have attached a picture but only a mobile photo as the wife has taken the camera for the day!

sorry it looks adhoc but ive ripped it all out to do something useful to the hull (prob get it ready for an engine!!) and no my soldering is usually better and insulated its just for the picture.
Logged

barry park

  • Guest
Re: OK so what am i doing wrong???
« Reply #18 on: August 17, 2008, 09:24:20 PM »

Hi Whiskyfrank,
 I have doubts that you damaged an ESC....... I think it is down to a cutout mechanism of a modelflight forward only esc.
Powered glider ones cut out throttle deliberately.
Some require waggling throttle to arm them.

Forget pics of receiver....instructions and ESC would help.
Can't even tell from pic if you've paralleled the batteries......5-cells would trigger a low-battery cutout in electric flight.
I trust your diagram is correct?

I see you mention a meter and you have 10 NiMh cells.....That's not 12 volts.
Logged

barry park

  • Guest
Re: OK so what am i doing wrong???
« Reply #19 on: August 17, 2008, 09:29:26 PM »

Is esc in a purple ribbed anodised aluminium case?
Logged

DickyD

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 9,497
  • www.srcmbc.org.uk
  • Location: Southampton UK
    • SRCMBC
Re: OK so what am i doing wrong???
« Reply #20 on: August 17, 2008, 10:22:26 PM »

10 cells @ 1.2v = 12volts  O0
Logged
Richard Solent Radio Controlled Model Boat Club http://www.srcmbc.org.uk

warspite

  • Guest
Re: OK so what am i doing wrong???
« Reply #21 on: August 17, 2008, 10:57:51 PM »

Is esc in a purple ribbed anodised aluminium case?

Looks blue to me, like an Xtra by ripmax
Logged

Stavros

  • Guest
Re: OK so what am i doing wrong???
« Reply #22 on: August 17, 2008, 11:00:37 PM »

Hi Whiskyfrank,
 I have doubts that you damaged an ESC....... I think it is down to a cutout mechanism of a modelflight forward only esc.
Powered glider ones cut out throttle deliberately.
Some require waggling throttle to arm them.

Forget pics of receiver....instructions and ESC would help.
Can't even tell from pic if you've paralleled the batteries......5-cells would trigger a low-battery cutout in electric flight.
I trust your diagram is correct?

I see you mention a meter and you have 10 NiMh cells.....That's not 12 volts.

2x 1.2v equalls 6v so times 2 equals 12v got the same packs myself supplied if I am not mistaken from Component shop and when you connect them the way they are connected they give 12+ . When they are newly charged they show more or less 7v ish each


Stavros
Logged

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 19,097
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: OK so what am i doing wrong???
« Reply #23 on: August 17, 2008, 11:56:01 PM »

What information in on the speed controller?
What model is it?
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

barry park

  • Guest
Re: OK so what am i doing wrong???
« Reply #24 on: August 18, 2008, 01:06:06 AM »

OK dickyD........just try taking your electric flight model out for a spin after checking the pack is fully charged (6 volt) O0 

OK Stavros
Quote
2x 1.2v equalls 6v so times 2 equals 12v
.....I think not
Quote
When they are newly charged they show more or less 7v ish each
  slightly more than 14 (not 12).

You may find some speed controllers and servos will work with a 6 volt receiver supply but not a 5 cell Ni-mH pack or 4 new Duracell's......just an example where accuracy counts.
Logged
Pages: [1] 2 3 4   Go Up