RoboteQ AX2550/2850 user manual Power-On Safety, Under Voltage Safety, Data Logging in Analog Mode

Analog Control and Operation

TABLE 22. Analog deadband parameters and their effects

	Pot. Position resulting in		Pot. Position resulting in
Parameter Value	Motor Power at 0%		Motor Power at -/+100%
0	0%	2.5V	94%	0.15V and 4.85V
1	0% to 2.4%	2.44V to 2.56V	96%	0.10V and 4.90V
2	0% to 4.7%	2.38V to 2.62V	93%	0.18V and 4.83V
3 (default)	0% to 7.1%	2.32V to 2.68V	95%	0.13V to 4.88V
4	0% to 9.4%	2.27V to 2.74	93%	0.18V and 4.83V
5	0% to 11.8%	2.21V to 2.80V	95%	0.13V to 4.88V
6	0% to 14.2%	2.15V to 2.86V	94%	0.15V and 4.85V
7	0% to 16.5%	2.09V to 2.91V	96%	0.10V and 4.90V

Important Notice

Some analog joysticks do not cause the potentiometer to reach either extremes. This may cause the analog voltage range to be above 0V and below 5V when the stick is moved to the extremes, and therefore the controller will not be able to deliver full forward or reverse power.

Power-On Safety

When powering on the controller, power will not be applied to the motors until both the Channel 1 and Channel 2 potentiometers have been centered to their middle position (2.5V on each input). This is to prevent the robot or vehicle from moving in case the joystick was in an active position at the moment the controller was turned on. The “no ctrl” message will scroll on the LED display while the controller is disabled.

Under Voltage Safety

If the controller is powered through the Power Control input, and the motor battery voltage drops below 5V, then the controller will be disabled until the analog commands are cen- tered to the midpoint (2.5V on each input).

Data Logging in Analog Mode

While in Analog Mode, the AX2500/2850 will continuously send a string of characters on the RS232 output line. This string will contain 12 or 13 two-digits hexadecimal number rep- resenting the following operating parameters.

•Captured Analog Command 1 and 2

•Power Applied to Controller’s output stage

•Raw analog command values

•Amps on channel 1 and 2

112 AX2500/2850 Motor Controller User’s Manual Version 1.7. February 1, 2005