37mm DC motor problem

#1

So i recently purchased the ultimate robot kit from roboshop and was excited to get to work. I have noticed my 37mm DC Motor (the big boy) is unable to be turned free hand (no matter how hard I try to turn it) and when powered by the 6v battery pack it cannot even move and when I have a 12V AC adapter connected the motor is able to move slightly better than the 6v case.

I started with the robot arm tank and have been really disappointed my arm cannot even move since that motor does not seem to be functioning correctly.

Hopefully I can get a representative from Makeblock to contact me about this issue but I am just wondering from everyone else if they have been able to free hand turn the 37mm DC Motor or if it has been stuck for you as well?

#2

Hello

For the problem of 37mm DC motor, you can try 10V-12V external power source or battery to check whether it works, please pay attention to increase the speed of motor when you test it. The most important is DON’T connect the DC motor to 12 AC adapter, it may burned the board.

#3

Just to clarify the 12V adapter i used was AC to DC and looked to be in the correct ampage range for this motor. The adapter is normally used for my external harddrive…which brings me to the point that it seems kind of silly that Makeblock uses a 12v motor but only supplies a 6v battery pack…they should at least give you a second battery pack with a way to connect the packs in series together for 12v.

@peterlee, are you able to hand turn the shaft on your 37mm motor or is it unmovable to you as well? I just want to determine if my motor is functioning as intended or is defective.

#4

Hello

The shaft of 37mm motor can not be turned by hand, except you can turn the shaft adding a wheel on the shaft. I suggest you can test this motor using 12v power source and check whether it can rotate.

Thanks
Peter

#5