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AX2500/2850 Motor Controller User’s Manual 21
SECTION 2 AX2500/2850
Motor Controller
Overview
Congratulations! By selecting Roboteq’s AX2500/2850 you have empowered your-
self with the industry’s most versatile and programmable DC Motor Controller for
mobile robots. This manual will guide you step by step through its many possibili-
ties.
Product Description
The AX2500/2850 is a highly configurable, microcomputer-based, dual-channel digi-
tal speed or position controller with built-in high power drivers. The controller is
designed to interface directly to high power DC motors in computer controlled or
remote controlled mobile robotics and automated vehicle applications.
The AX2500/2850 controller can accept speed or position commands in a variety of
ways: pulse-width based control from a standard Radio Control receiver, Analog
Voltage commands, or RS-232 commands from a microcontroller or wireless
modem.
The controller's two channels can be operated independently or can be combined to
set the forward/reverse direction and steering of a vehicle by coordinating the
motion on each side of the vehicle. In the speed control mode, the AX2500/2850
can operate in open loop or closed loop. In closed loop operation, actual speed mea-
surements from tachometers or optical encoders are used to verify that the motor is
rotating at the desired speed and direction and to adjust the power to the motors
accordingly.
The AX2500/2850 can also be configured to operate as a precision, high torque
servo controller. When connected to a potentiometer coupled to the motor assem-
bly, the controller will command the motor to rotate up to a desired angular position.
Depending on the DC motor's power and gear ratio, the AX2500/2850 can be used
to move or rotate steering columns or other physical objects with very high torque.
The AX2500/2850 is fitted with many safety features ensuring a secure power-on
start, automatic stop in case of command loss, over current protection on both
channels, and overheat protection.