robotdude
Canada
Asked
— Edited
I'm trying to build a mid-size robot using the Thumper 4wd and two 2.5 Amp motor controllers and 12v/12Amp battery to run it but I don't have torque to turn it around (only to go forward/backwards). Actually I can easily stop the wheels with my hands. However if I will connect the motor directly to the battery I can't stop it from turning. So my guess is that the 2.5 amp is not enough or something is wrong. There is any quick fix for that on the 2.5 amp controller or should I get a new motor controller? Or. I'm pushing the unit to the limits Help..
Well I'm glad to hear you got it back up and running!
yep, thanks for you help
Great bit of fault finding I must say. However be careful as I would say you have burnt out a land somewhere on the EZ-B board and as DJ said it looks like the EZ-B was providing power to the motor controller not the batteries.
Can you post a diagram of your wiring?
Sure, I will make the wiring diagram. I still want to make this monster turn on a carpet.
Good in the meantime dont stall the motors with your hand you may overload something again. I take it they are geared motors on the wild thumper chassis?
yes, its the Thumper 4wd
This is my wiring diagram, I don't see how the EZB will be damaged by this setup unless I'm missing something here. It is functional. However, it's very weak and cannot turn on carpet even with new indoor wheels. If I will just connect the battery directly to the motors it will make it work very hard with plenty of torque, it's like the h bridge is not providing the required amps to the motors.
I didnt realise you had 2 H bridges? others can comment if they are wired correctly I only have 2 motors on my H bridge
I would disconnect the 5Volt supply from the EZB but make sure there is a ground wire back to the board and see what happens then. If its taking power from the EZB and not the 12 Volt supply nothing will happen. Then you can check the setup of the H bridges.
Also try just one H bridge by completely disconnecting the other one