RoboteQ AX500 manual Left/Right Tuning Adjustment, Joystick Calibration

R/C Operation

Left/Right Tuning Adjustment

When operating in mixed mode with one motor on each side of the robot, it may happen that one motor is spinning faster than the other one at identically applied power, causing the vehicle to pull to the left or to the right.

To compensate for this, the AX500 can be made to give one side up to 10% more power than the other at the same settings. This capability is described in detail in “Left / Right Tuning Adjustment” on page 43, in the General Operation section of this manual.

Joystick Calibration

This feature allows you to program the precise minimum, maximum and center joystick positions of your R/C transmitter into the controller’s memory. This feature will allow you to use the full travel of your joystick (i.e. minimum = 100% reverse, maximum = 100% for- ward). It also ensures that the joystick’s center position does indeed correspond to a “0” motor command value.

Joystick calibration is also useful for modifying the active joystick travel area. For example, the figure below shows a transmitter whose joystick’s center position has been moved back so that the operator has a finer control of the speed in the forward direction than in the reverse position.

The joystick timing values can be entered directly in the controllers flash memory using your PC running the Roborun configuration utility. This method is described in “Loading, Changing Controller Parameters” on page 134

New Desired

Center Position

Min Min

Reverse Forward

Max	Max
Reverse	Forward

FIGURE 59. Calibration example where more travel is dedicated to forward motion

90 AX500 Motor Controller User’s Manual Version 1.9b. June 1, 2007