RoboteQ AX2850 user manual Thermal Considerations, Attaching the Controller Directly to a Chassis

Thermal Considerations

Mounting brackets on each end are provided for durable assembly of the controller onto any chassis.

Optional shock mount absorbers may be added for use in the most brutal environment.

Thermal Considerations

The AX2550 is built into a heat-sinking aluminum extrusion. The large fin area on the side of the extrusion ensures sufficient heat dissipation for operation without a fan in most applications.

For high current applications, it is possible that the controller may heat up faster and to a higher temperature than can be dissipated by the heatsink enclosure using natural convec- tion alone.

In these applications, you should ensure that air flow exists to remove the heat from the heat sink. In the most extreme use, you should consider using an external fan to circulate air around the controller.

Attaching the Controller Directly to a Chassis

The AX2550 can be attached to a metal chassis to improve heat dissipation.You may mount the controller so that its bottom area is in contact with large metallic parts of the robot’s body. This will allow some of the controller’s heat to dissipate through conduction to addi- tional metal mass, therefore remaining cooler for longer periods of time. Apply thermal grease between the controller’s bottom and the robot’s chassis to ensure the best thermal conduction.

Wire Dimensions

A total of eight heavy gauge wires, and two thin wires are present at the back of the con- troller. Their length and dimension is shown in Table 37 below.

TABLE 37. AX2550 wire identification and dimensions

Wire	Gauge	Outside Diameter	Color	Length
Motor1 Battery+	AWG8	0.26” (6.6mm)	Red	17”(43mm)
Motor1 Battery-	AWG8	0.26” (6.6mm)	Black	17”(43mm)
Motor2 Battery+	AWG8	0.26” (6.6mm)	Red	17”(43mm)
Motor2 Battery-	AWG8	0.26” (6.6mm)	Black	17”(43mm)
Motor1 Terminal+	AWG8	0.26” (6.6mm)	White	17”(43mm)
Motor1 Terminal-	AWG8	0.26” (6.6mm)	Green	17”(43mm)
Motor2 Terminal+	AWG8	0.26” (6.6mm)	White	17”(43mm)
Motor2 Terminal-	AWG8	0.26” (6.6mm)	Green	17”(43mm)

AX2550 Motor Controller User’s Manual 199