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Alex P. HASD Bots
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PostSubject: robot electronic problems   Sun Mar 25, 2012 8:52 pm

Does anybody got any idea why our robot will run great with weapon on and drive system running smoothly, then all of the sudden the robot will become very sluggish hardly even able to drive, and at times the robot then will not even move or the weapon start, we are running a mamba monster 2200kv motor with the mamba max 1/8th scale esc, we are running banebot 550 motors with orange banebot escs (the esc's are 3 years old, we are only using them due to the fact that our new order of esc's have not yet come in) and we are running a123 2650 mah batteries in a 6s setup, we checked the batteries and they seem to be performing very well with no cell gaps and very high mah's, at this point my team is guessing that it could be the drive escs and we are ordering new ones this week, please help we are otherwise at a loss of ideas
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Mr. P

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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 8:57 pm

can the bane bots esc and motor handle 6 cells?

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Don Doerfler
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 8:59 pm

Mr. P wrote:
can the bane bots esc and motor handle 6 cells?

yes
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Mr. P

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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 9:03 pm

Don Doerfler wrote:
Mr. P wrote:
can the bane bots esc and motor handle 6 cells?

yes

esc 24
550 operating v 6v-14.4

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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 9:07 pm

the motors themselves usually dont feel to hot, probably cause were only running 30% power to them with how much current is pulled through that weapon motor, and the batteries are coming out at about 140 degrees sometimes
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Mr. P

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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 9:10 pm

can be but there are problems that occur. you know that. heat in the robot. look at propel last year without a weapon and the right volts was over heating. over volting anything and it can be an issue. banebots says you can run both BEC on the two esc in one robot and I know people on here disagree. they say not more that 14.4volts per motor. people disagree with that on here. regardless his electronics are bogging down. maybe a 4 cell test would rule out both my suggests.

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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 9:13 pm

battle pack.com
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Mr. P

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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 9:15 pm

Alex P. HASD Bots wrote:
battle pack.com

i retract my suggestions. alex take it from here

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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 9:19 pm

they are the green cells a123 cells, and 12 guage noodle wire, deans connectors or 6.5 mm bullet connectors dependent upon the wiring harness, team wyhachi switch one big enough to run with the current of the bot and bane bot 26:1 gear box with 3 inch wheels
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 10:09 pm

ok ill take a look at that thank you very much for the advice we appreciate it
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 10:16 pm

the voltage for the robot should be around the battery equivalency correct, and will any harm be done to the robot if we continue to run it in an attempt to figure out what the problem
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 10:26 pm

ok thats reassuring, hopefully we can figure out somethin, i also wondered if it could be in the transmitter it self, could be possible that something got bumped, and i also started to think it could be the throttle curve of the weapon we may need to make it a gradual linear at first so there isnt such a large pull on the batteris at first, does either of these two ideas sound plausible
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Sun Mar 25, 2012 10:33 pm

ok thank you for the help
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 1:12 pm

i started looking at what our controller was capable of doing, we have the dx6i, and i was wondering what the difference is between helicopter and airplane mode is
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 1:21 pm

ok thats what we have always used, i never realized what that controller could do until this mornin
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 1:26 pm

ok wow never even thought of those, all we use is the tank steering and gear switch for the weapon
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 1:35 pm

can you use the dual rates to help control power flow to the gear swithch?
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Koolaid64
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 3:03 pm

I love my tank drive. What you need is a rotary switch. All the channels on the controller work the same way, the sticks are just on rotary switches which gives them more range between the high and low positions.


Last edited by Koolaid64 on Mon Mar 26, 2012 4:44 pm; edited 1 time in total
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 3:49 pm

thatd work, cause rite now its either all or nothin
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Koolaid64
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 4:46 pm

with the right set up that's all you'll ever need
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rdubard
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 8:28 pm

Now, I have to disagree with the overvolting of BB12-45. We have had repeated trouble anytime we have run more than 3sLiPo with them. They work fine for a minute or two, then overheat and begin to run very slow or not at all (sometimes in just one direction). Wait 20 seconds (no commands to the ESCs to move) and then it will work right for 10 seconds or so and then back to sluggish or glitchy. Every time we have lowered the applied voltage the problem has gone away.

I must admit that we did not begin to have these problems with the BB12-45 until about 2 years ago, about the time we switched from NiMH to LiPo, so it could be more of a current than voltage issue--but the opposite of what Alex is saying--too much current available at the higher voltage caused the ESCs to overheat and shutdown.

I am not trying to be argumentative, but this really has been our experience (repeatedly).
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 8:31 pm

thank you for the advice i will most definitely look into it
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 8:45 pm

thats what we are usin do speed controllers wear out over time
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 8:49 pm

ok so there goes that hunch Laughing
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Alex P. HASD Bots
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PostSubject: Re: robot electronic problems   Mon Mar 26, 2012 8:51 pm

from what i can tell they did not heat up at all in our bot on saturday, and we have a piece of shim stock between the battery and weapon esc to keep that from heatin up
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