EKOS clone and upgrade questions.

[JPriami]

it says the lvc for 4S is 12v. and after my 3min of runtime on my 3s packs i come in and the packs are at 12v. kinda blows cause 9v should be the cutoff for 3s. but since my esc's wont do 3s and the lowest they will do is 4s im screwed.

[FighterCat57]

sounds like a good idea thanks
are they cheap and in the usa so i dont have to wait weeks to get? I ordered my first thing from hobbyking over 2 weeks ago now. still waiting for it. i really like things in the states bought and sold here type deal.

I see the link you poasted thanks.
What do you think about this one?tesla voltage alarm

Oh, I don't know anything about them, just posted a random search link for reference. I use the same kind as the one I linked to. I think all the ones from china come from the same factory... It's a simple circuit, so I'm sure just about any will do OK.

[FighterCat57]

it says the lvc for 4S is 12v. and after my 3min of runtime on my 3s packs i come in and the packs are at 12v. kinda blows cause 9v should be the cutoff for 3s. but since my esc's wont do 3s and the lowest they will do is 4s im screwed.

Can you turn off the LVC?

They also make external LVC circuits that you can put in place between your ESC and Rx.

[Brushless55]

it says the lvc for 4S is 12v. and after my 3min of runtime on my 3s packs i come in and the packs are at 12v. kinda blows cause 9v should be the cutoff for 3s. but since my esc's wont do 3s and the lowest they will do is 4s im screwed.

The 12v is at rest
when under a load they will be well under 12v and shut the sytem off completely
it could be possible the esc is set to 2.8v per cell (under load).. 11.2v on 4s and that could be the issue
and a reason you come back with 12v in your 3s packs

[Brushless55]

Can you turn off the LVC?

They also make external LVC circuits that you can put in place between your ESC and Rx.

Should be a way to do this..

[JPriami]

The 12v is at rest
when under a load they will be well under 12v and shut the sytem off completely

I smell what your cooking. But im about 99% sure that the esc's are not what they say they are in being 2-6 cell ones. because even in the programming menu when you listen to the tone and following beeps there is a area missing to turn the 2 cell option on. it completely skips that part. and i found a data sheet for programming another esc that we think is the same one but has a marine heatsink on it with identical programming menus and it says the 70amp esc's are 4-8 cell and according to the tones its sending out and looking at the decode sheet its apparant that it isnt the esc its supposed to be (2-6 cell). i wish i could explain that a little better it would be easier if one where here to hear what its doing and looking at the decode sheets.

[JPriami]

found this LVC lvc on the bay but for $25 and i would need 2. i would rather put that $ towards new esc's

[Brushless55]

I smell what your cooking. But im about 99% sure that the esc's are not what they say they are in being 2-6 cell ones. because even in the programming menu when you listen to the tone and following beeps there is a area missing to turn the 2 cell option on. it completely skips that part. and i found a data sheet for programming another esc that we think is the same one but has a marine heatsink on it with identical programming menus and it says the 70amp esc's are 4-8 cell and according to the tones its sending out and looking at the decode sheet its apparant that it isnt the esc its supposed to be (2-6 cell). i wish i could explain that a little better it would be easier if one where here to hear what its doing and looking at the decode sheets.

see if there is an option to remove the lvc
I use a watt meter on my 3D planes all the time to see what prop gives awesome 3D power
I've found that some of my packs will go to 10.8v when I run a static test with big props and this is on 3s
but when I let off and the packs are at rest they come back up in volts to 12v+
all depends on amp load and how much your packs can put out to maintain good volts
so far my Turnigy 2200mah 25c packs maintain higher volts that gives me more watts and rpm for faster and more aggressive 3D flying

[JPriami]

I understand that when under a load the volatge will drop more than when the system is at rest. I wish I had a logging system to read what its doing. then i could prove it other than people taking my word cause apparently thats not enough lol (i can relate tho because there is a bunch of bad info to be found online and im just another screen name in the sea). but being a whole selection is missing in the esc's programming menu thats pretty suspicious. and thats why i am really leaning towards it thinks im running 4S and cutting it off when the packs hit under 12v.
they are nice new packs hyperions 3s 5000mAh 45C they should be kicking butt

[Brushless55]

The 12v is at rest
when under a load they will be well under 12v and shut the sytem off completely
it could be possible the esc is set to 2.8v per cell (under load).. 11.2v on 4s and that could be the issue
and a reason you come back with 12v in your 3s packs

take off the lvc

[JPriami]

i dont think it can be turned off completely. there is nothing in the menu saying it can be turned off. I think the best that can be done is turn on the nicad/nimh mode at 0.7v per cell lvc

[FighterCat57]

i dont think it can be turned off completely. there is nothing in the menu saying it can be turned off. I think the best that can be done is turn on the nicad/nimh mode at 0.7v per cell lvc

Yeah, that would essentially turn it off. Then use an external LVC or Low Voltage Buzzer.

Alternatively you could replace the motors with a lower KV and run 4 -5s.

[JPriami]

I plan on running 4S in the boat on my next lipo purchase. the motors are good up to 4S. honeslty i wish i would have just ordered 4S packs off the bat and this wouldnt have been a problem.
I ordered some low voltage buzzers just now. I will run the boat in the nicad mode and use those for now. will sell my bigger heli and use that $ towards new esc's. then later more lipos so i have 2 sets of lipos i can use. then later new motors. then props. then onto a new boat project.

[Brushless55]

i dont think it can be turned off completely. there is nothing in the menu saying it can be turned off. I think the best that can be done is turn on the nicad/nimh mode at 0.7v per cell lvc

That's it, Perfect!
now go give it a whirl!

[Team Jericho]

Looks sweet! Might as well take out the engines and use them as paper weights if you are planning to run 4Ss :) Feigao 380 9XLs are great for this boat. Where did you order it?