KHR-1 problem

[Shinji]

hi guys
I just need some help here xD am new to this forum and to robots in general. and I recently got a KHR-1 ...successfully assembled it, but am facing problems with the batter. I kept it charging for 12 hours ( as it says in the manual) but the Robot only worked for 1 minute or so. I tried recharging the battery several times for about 12 to 24 hours, and the result was approximately the same (functioning for 1 or 2 minutes or so) I wonder if the battery has a problem, or probably the charger...I dont really know T__T plz help guys T_T
I also have another question about using a power supply (7 V and 10 amps...how do I connect it to the Robot xD Sorry am newbie XD lol
thanks in advance ^_^

[inaki]

Check if your battery gets too hot when running. You may have some servo that is draining the battery. Check that all servos can move by hand smoothly. The 600mA battery lasts for about 10 minutes in my experience. The power supply must be connected in the same plug you connect the battery.

[Guest]

thanks for the reply...I will be working on the servos and double check everything before my next post, thanks for telling me about that issue.

about the power supply, how can i actually connect it to RCB (the batery requires a special connector to connect it to RCB-1. if I have a power supply, do i use the power cable that connects the 2 RCB's to connect the power supply to RCB ? or there is another way of doing it...cuz the regular connector of the power supply wont fit in RCB.


thanks alot for the help ^_^..

[inaki]

The obvious way to connect an external power supply to the RCB1 connector is precisely replacing the power supply output connector with a female connector identical to the one in the Kondo battery. I found one of these in an electronics store. The reason to have an identical connector for both, battery and power supply is that you may want to work with or without the power supply so using a different connector is not a good idea.

[Shinji]

thanks for the reply, Iv been testing servos and double checking all connections. Everything seems to be working fine, except for the fact that I have to change channels in the 2 RCB boards. other than that the battery didnt get hot, and the servos move smoothly with no problems. The battery lasted for about 1 minute, which means the problem still exists. I still cant locate the exact problem, thus I think am gonna go get the power supply ...

thanks Inaki for the reply, I guess am gonna ge search for the female connector for the power supply. Will 7V and 10 Amp work fine on the Robot ?

guys plz if you have any suggestions regarding the battery problem, you are more than welcome ^_^

[Toukisarchu]

I would think its some kind of short. either that or the battery isnt charging properly. check the voltage of the battery before and after you charge it. The fact that the battery isnt gettting hot when you use it would imply that it has little intial charge. for a 600mha battery to be drained in 1 minute would mean your drawing some insane current. Get a mulitmeter and check the current and voltage.

[Shinji]

thanks guys for everything...I will be checking the voltage of the battery in 2 hours..and I will post the results.

thanks again ^_^

[Shinji]

hi guys ...
Iv tested the battery with a multimeter and the battery produces about 6.5 V. but..the problem still exist. Iv plugged the battery again to the robot after charging it for about 14 hours, but still.. the same problem, the Robot only worked for one minute and then it stopped T_T. I dont really know where the problem is located, is it the battery or the charger...both of them work just fine, and I didnt face any problems charging or using the battery ( no heat is produced by the battery when used T_T) ... so guys....do you have any suggestions ?

thanks agian (Y)

[Toukisarchu]

Prehaps connect a multimeter between the battary and the robot and check the current when you power it on. If all your power is been drained in 1 minute that you should be drawing 36Amps (I think thats right). I dont think the small wires on khr-1 can handle that kind of current. I believe it is either that your battery has died or isnt been charged properly. Check and se if there is any current and voltage when you charge the battery. If there is then i would suggest the battery is stuffed and you will need to replace it.

[Ray]

I wish the following is of help to you:

To check for bad battery,

1) measure the battery voltage while making several servo moving,
if it drop quickly it may has problem

2) If you charge the battery, the battery voltage rise very quickly
within, say, 1 minute for (1~2volt) the battery may fail

3) if you put a 18 ~22 ohm (5W) resistor across the charge output, if the voltage of the charger can still gives, say, 7 volt or more, then the charge is ok.