Problem

[psycho_fling]

im running 4 12v drill mootors on 2x 8.4volts with electronize speedos, but its not working

all i get is a groaning sound and no movement, the batteries are charged and i tried othe packs in there (lower volts) and it worked fine

Any ideas?

alex

[dragonmaster_1]

It is your batterys you should try cycling them a few times discharge them then recharge them a couple of times.

should this work then?

[RogueTwoRobots]

The only problem is, if you cant discharge the packs because they dont work in the robot, then you wont be able to cycle them properly.

Even if the batteries do need cycled, they should have enough power in them to turn the wheels, especially if youve charged them once already.

If youve got a multimeter handy, check the voltage across the terminals of the batteries to make sure there isnt a fault in the battery packs first of all.

[psycho_fling]

no didnt seem to do it, ill take it along tomorrow to run on 7.2v packs and the new packs perpahaps some expierence people could have a look

[woody]

Try each 8.4v pack by itself in the bot .. you should be able to tell if you have one that is dead.

i havent had chance yet to try each battery on its own yet, but if the was a bad connection or lose tage within the pack, would i be getting a voltage reading? because i am

alex

[typhoon_driver]

removed the speed controllers from the equation completely and connect the motors directly to the batteries. You will be able to guage if its the batteries by how long the motors run unloaded for.

If they run fine for a good 10minutes unloaded then it will probably be the controllers.

[psycho_fling]

i try it but i have had it running with lower voltage packs, so wouldnt that rule out the speedos?

[typhoon_driver]

It may or it may not rule out the speedos. The important thing is that you will have a better idea of where the problem lies.