Killer Max Version 2 Part II

Majority of the new chassis for the Killer Max ver 2 is finished. All the parts seems to fit as my design. However, I'm still unsure if the wheels in the front is in horizontal with the rear wheels. I plan to add shield surround my robot as well as a cannon just for a cooler looks.

The infrared sensor is installed and check with a camera for the blink light. I installed the sensor on the very front of my tank compare to others have installed in the middle of their robot.
All for motor is check and work fine. However, when i try to test it through the brain and the motor chip, i can hear a small engine sound but the wheels won't spin. I'm still wonder if it's the motor chip's problem or something else.

Saturday is the competition, which leaves only few days to fix the motor problem. I have finished majority of the programming code, what's left is to assign each of the 4 motors to the right part.

This is the 4th week, we almost finish building the robot and still working on the programming job. So far, my robot can move forward and backward as the program, it will also turnaround(move back for 2 second and then turn left) if the sensor reading is higher than 100.

Now my robot is facing two problems: first, the sensor is getting too far from the ground, it can hardly read the signal, the robot will keep moving forward and move out of the edge without stop or moving back, I need to consider to change the shape of the robot and move the sensor closer to the ground so it can read the signal better.

The other problem is that the robot moves way too slow, maybe it's just the battery running low; but I'm still considering to change another ratio of the gear wheel for the motors to make it move faster so that it won't be easily crushed by the other robot.