Hello! Me and my team are working on a two-wheel simple robot having two motors and 12v 1.5amps supply for a small intra-college robo-race. The wheels are 10cm diam. and we have a cylindrical body between the two wheels with 8cm diam. The setup is all wired, nothing wireless( with the remote ). We have less time and no money(india), so we went wired. Anyways the problem is, when we turn on the motors, the entire cylindrical body moves but not the wheels. Note that the wheels are little heavier than the main body. We made the cylindrical body out of PVC and other two bowl shaped PVC structures to cover the motors.The axis of the motors is screwed with the wheel. In short, the torque is not being transferred to the wheels but the motor itself. Any help would be appreciated. Thanks!