RoboteQ AX500 Command Control Curves, Effect of deadband on joystick position vs. motor speed

Command Control Curves

The deadband is measured as a percentage of total normal joystick travel. For example, a 16% deadband means that the first 16% of joystick motion in either direction will have no effect on the motors.

TABLE 13. Selectable deadband values

Deadband Parameter Value	Deadband as Percent of full Joystick Travel
d = 0	No deadband
d = 1	8%
d = 2	16% - default value
d = 3	24%
d = 4	32%
d = 5	40%
d = 6	46%
d =7	54%

Note that the deadband only affects the start position at which the joystick begins to take effect. The motor will still reach 100% when the joystick is at its full position. An exagger- ated illustration of the effect of the deadband on the joystick action is shown in the Figure 58 below.

	Deadband
Min	(no action)	Min
Reverse		Forward
Max		Max
Reverse		Forward

Centered

Position

FIGURE 58. Effect of deadband on joystick position vs. motor speed

Command Control Curves

The AX500 can also be set to translate the joystick motor commands so that the motors respond differently depending on whether the joystick is near the center or near the extremes. Five different exponential or logarithmic translation curves may be applied. Since this feature applies to the R/C, Analog and RS232 modes, it is described in detail in “Command Control Curves” on page 42, in the General Operation section of this manual.

AX500 Motor Controller User’s Manual 89