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-   -   Cut off on 37V lipo (https://www.rc-monster.com/forum/showthread.php?t=5140)

gizzmo79 01.04.2007 10:24 AM

Cut off on 37V lipo
 
i'm going to bulid a brushless fg, i'm going to run with 37v lipo (18.5Vx2)
But is there a way to get cut of on this setup
At maxamps i can find cut of for 5s lipo, but can i use to of them? One to each battery, is so how do i wire them?

nieles 01.04.2007 10:34 AM

http://www.dimensionengineering.com/LipoShield.htm

1-12S

gizzmo79 01.04.2007 10:40 AM

thanks that wil work

nieles 01.04.2007 10:43 AM

yea and its only $20

Nick 01.04.2007 11:42 AM

I have that one, it kept locking in to full throttle and shooting off, had to take it off.

BrianG 01.04.2007 11:56 AM

Quote:

Originally Posted by Nick
I have that one, it kept locking in to full throttle and shooting off, had to take it off.

Ouch! That could be bad if you're not expecting it! If you pull the label off, is there a little surface mount potentiometer on there? I'm thinking you can set the throttle position with this, kinda like you do with an external failsafe. Just a thought.

Nick 01.04.2007 12:10 PM

It was bad because you didn't know when it was going to do it, so I had to go really slow, lol.

Not seen anything under the label but it definatly feels like a malfunction/interference rather than programming.

Serum 01.04.2007 01:01 PM

Yeah, i contacted dimension engineering about it a few months back. They told me it would be fine to use it on a truck.

BP-Revo 01.04.2007 03:01 PM

What??? Shoot off? Thats horrible...not only bangs the truck up, but fries that pack too!

I know I was stating the obvious...but its fun sometimes lol...

BrianG 01.04.2007 03:44 PM

I'd like to get a hold of one of those to see if it could be easily modded (any donors? :)). Since it goes into full forward when triggered, it simply puts out 2ms signal pulses to the ESC telling to go full bore. If an adjustment was added to reduce this to 1.5ms, it would go to neutral instead. You could also set it to put out 1ms pulses instead so it goes full brake instead too...

jhautz 01.04.2007 06:09 PM

Quote:

Originally Posted by BrianG
You could also set it to put out 1ms pulses instead so it goes full brake instead too...

or full reverse :002: depending on how you have the ESC setup

BrianG 01.04.2007 07:14 PM

True. I guess my point is that it would be nice if it was adjustable to whatever application...

giftacrylic 01.04.2007 07:17 PM

Per Serum's suggestion, I got one of these and run it on my 5s Maxx. It works great, ONLY if you don't have reverse programmed.

Nick 01.04.2007 08:34 PM

Quote:

Originally Posted by giftacrylic
Per Serum's suggestion, I got one of these and run it on my 5s Maxx. It works great, ONLY if you don't have reverse programmed.

How do you mean reverse programmed? On the ESC? I have the 9920 in reverse, maybe that's what gave me the throttle problems.

BrianG 01.04.2007 09:01 PM

Yup, that would do it! Sounds like it would work great if you have reverse disabled.

jhautz 01.04.2007 09:36 PM

The LVC in the RCM store doesnt have this issue does it? I was planning on using one of those with my 12020. But that sounds like a big PITA to me.

This is the one Im taking about...
http://www.rc-monster.com/proddetail...rod=lisavercar

Nick 01.05.2007 06:10 AM

Quote:

Originally Posted by BrianG
Yup, that would do it! Sounds like it would work great if you have reverse disabled.

How do you disable reverse on the 9920?

BrianG 01.05.2007 11:05 AM

Various BK Warrior Programming Links:

Link 1
Link 2
Link 3

The part you're interested in is:

Quote:

Originally Posted by RC-Monster Mike
Now that we have the controller wired and the motor and controller installed, we may begin the initial programming sequence.
First, turn on your transmitter.
Next, remove the red programming bridge (little red jumper near the battery leads). While you are there, you should also remove the black BEC jumper if you are using a receiver pack or UBEC as recommended. This black tab is near the red jumper, but tucked under the heatshrink. Remove this to disable the BEC and utilize the receiver pack/UBEC.
Now plug in the receiver pack/UBEC and the main batteries and wait. After 5 seconds, you will here a beep from the motor. When you here this beep, move the throttle to full power and wait. after another 5 seconds, you will here another beep. When you here this, move your throttle control to full reverse and wait. After 5 seconds, you will here a double beep, indicating that set up is complete. Now replace the red programming jumper and turn off/unplug your main batteries and receiver pack.
Congratulations, you have just programmed your controller for Forwad/Brakes/Reverse operation and it will operate similar to a regular reversible speed controller. The controller can be set up as a forward/brakes controller, as well. This is done by returning the throttle position to neutral (instead of full reverse)before the final set of beeps (double beeps). For forward only operation, keep the throttle at full throttle (instead of neutral or reverse) before the final set of beeps. This is useful for setups using mechanical brakes.
Now, if the motor goes backwards when you want it to go forward, we can quickly fix that as well. Here goes:
Turn on your radio, plug in the main batteries and receiver battery(or UBEC). While the system is on, remove the red jumper. When you here a beep, put the red jumper back on the controller. That is it! You just reversed the motor direction!


neweuser 01.05.2007 12:54 PM

The Li Saver in the RCM is a car version and you should not have any issues with it.


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