Defeating Axis
Point your gun directly at the face in the computer and hold [Fire] to lock your mecha in place. Try to equip the strongest weapon you have, such as the homing missiles. With your position locked, move forward and shoot at the face. Then as the computer fires the floating mines at you, just back away and strafe to the side to avoid them as they come at you. Never release [Fire]. Do this several times and you can defeat this Boss without taking damage.