FIRST Global Building Guide Created by REV Robotics 2019, Licensed Under CC BY-SA
5
2.3
DC MOTORS
DC motors are used to power wheels and control moving robot parts, like arms. The Core Hex DC Motor (Figure 5)
included in the FIRST Global Kit has a 5mm hex socket drive shaft surrounded by six m3 mounting holes on both sides
called the Motion Interface Pattern. The back of the motor has a 2-pin connector for power and a 4-pin connector for an
encoder cable.
The normal rotation, the direction of spin when the motor is going “forward,” is marked with an arrow on
the front of the motor.
Figure 5: Core Hex DC Motor
Both sides of the Core Hex motor have a Motion Interface Pattern for bolting to any of our motion brackets (see Table 2).
The Motion Interface Pattern consists of six evenly spaced bolt holes. The bolt hole pattern on both sides of the motor
allow it to be mounted in multiple orientations (Figure 6).
Figure 6: Core Hex Motor Front and Back Mounting Plates
The offset between the front and back mounting plates shown in Figure 6 enables the motor to be mounted at 12 different
motor orientations, including vertical and horizontal when both sides of the motor are used. Figure 7 below shows a
horizontally mounted motor which is flipped from the vertical motor with the front facing out. Note that when the motor is
flipped, the direction that the shaft spins is also flipped.
Figure 7: Core Hex Motor Mounting Options
