ESC

[david the newbeParticipant @davidthenewbe]

hi all

ive just been giving an ESC and it says on it dc input 2s – 3s lipo do i have to use lipo batterys or can i use any really

thanks dave

[david the newbeParticipant @davidthenewbe]

esc and battery

[hobbiesruzParticipant @hobbiesruz]

Hi David… The esc should also state 5-12 NIMH… Wat batteries were you thinking of using..

[david the newbeParticipant @davidthenewbe]

hi hobbiesruz

and thanks for your reply no it dont say 5-12 nimh as that is the battery type i would like to use

thanks dave

[hobbiesruzParticipant @hobbiesruz]

Hi Dave..what make esc is it… Gary

[hobbiesruzParticipant @hobbiesruz]

I think You can still use it the only thing is the cut off voltage is differant…

[david the newbeParticipant @davidthenewbe]

its a joysway 20A water cooled brushlees esc

dave

[ashley needhamParticipant @ashleyneedham69188]

David. Tricky, Tricky.

Most ESC (as far as I am aware) can be programmed to accept either battery types; OR be able to set the cutoff voltage to a higher value (so being more suitable for Nimh types) as Nimh dont mind being flattened,,unlike Lipo.

This means fiddling with the transmitter of purchasing a program card. This is best as it becomes easy then to program these things up.

Its not easy, you know…

Ashley

[david the newbeParticipant @davidthenewbe]

thanks ashley ill see if i can find a program card for it

dave

[hobbiesruzParticipant @hobbiesruz]

Hi Dave… They don’t seem todo a program card..most esc detect what voltage is being connected to them. The cut off voltage is proberbly set between 2.8 & 3volts per cell for lipo on that esc… A NIMH pack should be fine to use. as nimhs U can discharge to 1volt per cell and still take a charge. The problem U might have is duration being less as cut off voltage being high… Also that esc will not take more than 12.6volts… Gary

[david the newbeParticipant @davidthenewbe]

hi Gary

thanks for the info and as for the duration im not warried about that as i always have spare in my bag

thankyou again dave

[Malcolm FraryParticipant @malcolmfrary95515]

It might also be the case that NiMH batteries might not be able to deliver the same current as lithium. Under heavy load, the voltage might dip below the cut-off voltage and cause spluttery running.

[ashley needhamParticipant @ashleyneedham69188]

Dave what voltage Nimh are you using? Lipo in 2s form come in at 7.4V , so if the controller is set for Lipo operation, and you stick a 7.2V Nimh on it, it will see this as a slightly run down Lipo to start with !! I believe another forum member had this issue.

Ashley

[david the newbeParticipant @davidthenewbe]

im looking at useing a 8.4 nimh pack hopefully im going to put it to the test later today im the bath and see how long it lasts hopefully it dont go bang as its a water cooled esc but i dont have a boat to set that up but im looking at just some rubber pipe and cable tyes to hold all in place

dave

[david the newbeParticipant @davidthenewbe]

hi all

it worked ok for 30 mins but only 1 way it would not reverse but im not sure if brushless motors can be made to go 1 way as i was told the ESC is new

dave

[Diede van AbsParticipant @diedevanabs87670]

Brushless motors can run both ways, no problem. The problem is probably your ESC is a plane/heli one. Nice to use in speed boats (which you don't want to reverse anyways) but no good at all in scale models.

Read the manual to see if it can be programmed for running both ways, it might just be that the thing is capable of it.

[david the newbeParticipant @davidthenewbe]

no its not a plane or heli as its water cooled amd no manual with it as i was giving it by a mate who never whent brushless and he said it is new and never been used so maybe it was a bad 1

dave

[Diede van AbsParticipant @diedevanabs87670]

I searched the internet for the ESC – no real luck there, could not find the exact product and no manual either. What I did notice, is that Joysway seems to focus mainly on speedboats, so probably it's a speedboat ESC (which is essentially a plane ESC with watercooling…) so probably the bloody thing will not reverse.

If you connect the ESC with your throttle stick in full down position, and you start feeding the throttle… Do you have the whole stick travel for forwards only? Or does it only start running after you move the stick through the center? If you seem to "miss" half of the stick travel, you might still have some luck and you need to search harder for a manual to program it correctly.
If you can use the whole stick travel for forward only – tough luck to you, it's speedboat only.

What you can do however, is use a relay which you put on a different channel, with which you swap two of the three wires of the motor (only do that when it's not running!). Swapping two wires makes the motor run the opposite direction. Might be a bit fiddly, but could be worth trying.

Edited By Diede van Abs on 13/11/2012 22:03:46

Edited By Diede van Abs on 13/11/2012 22:07:28

[david the newbeParticipant @davidthenewbe]

hi Diede

thank you for looking .

it setsup with stick center and not like ones for planes where u have to move stick down to set it.

im thinking maybr the reverse side has gone

thanks for the advice i could have a boat with just forward like the swordsman im going to build

thanks again dave

[ashley needhamParticipant @ashleyneedham69188]

dave, Stick a big rudder on it right behind the prop with lots of throw and the lack of reverse will not be so bad !!

Ashley

[Diede van AbsParticipant @diedevanabs87670]

Posted by david the newbe on 14/11/2012 07:25:52:

im thinking maybr the reverse side has gone

Could be, however it is more likely that reverse is disabled or even that it's defaulting to braking. Maybe if you email Joysway (check http://www.joysway-hobby.com/Article_Show.asp?ArticleID=2) they can help you with a manual on how to set it up.

Brushless ESC's reverse by means of the order in which they activate the motor windings, very unlike brushed ESC's which use a separate set of FET's for the reverse. That means, simply said, that a on a brushless ESC a broken reverse is very unlikely as forward should be broken, too.

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