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AX2550 Quick Start
20 AX2550 Motor Controller User’s Manual Version 1.9b. June 1, 2007
Powering On the Controller
Important reminder: There is no On-Off switch on the controller. You must insert a switch
on the controller’s power wire as described in section“Connecting to the Batteries and
Motors” on page 17.
To power the controller, center the joystick and trims on the R/C transmitter. In Analog
mode, center the command potentiomenter or joystick.Then turn on the switch that you
have placed on the on the Power Control input.
If the R/C transmitter and/or receiver is powered off, the display on the controller will alter-
nate the letters spelling “no ctrl” to indicate that it is On but is not receiving a control sig-
nal.
Turn the R/C transmitter On. The “no ctrl” scrolling message will disappear and the display
will show steady patterns depending on the motor’s selected direction.
Move the joystick on the transmitter to activate the motors to the desired speed and direc-
tion.
See “R/C Operation” on page 109 of the User’s Manual for a detailed description of the
many features and options available in the R/C mode.
Button Operation
The AX2550 has three buttons: Set, Program and Reset. These buttons are not needed
for normal operation, as the controller is immediately operational upon power up.
The Reset button will restart the controller. This button is recessed and you will need a
paper clip to press it. Reset is also accomplished by turning the controller’s power Off and
back On.
The Set and Program buttons have the following functions depending how and when they
are pressed:
TABLE 1. AX2550 Buttons Function
Prog and Set button status Function
Press and hold Program alone during reset or power up Enter the Programming Mode.
Press and hold Set alone during reset of power up Enter Self-Test mode. See “Self-Test
Mode” on page 53 of the User’s Manual
Press and hold Program and Set together during reset or
power up
Reset configuration parameters to factory
default
FIGURE 5. “no control” scroll message indicates no valid R/C signal is present