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General Operation
38 AX2500/2850 Motor Controller User’s Manual Version 1.7. February 1, 2005
Current Limit Settings
The AX2500/2850 has current sensors at each of its two output stages. Every 16 ms, this
current is measured and a correction to the output power level is applied if higher than the
user preset value.
The current limit may be set using the controller’s switches or the supplied PC utility. Using
the switches, 7 limits may be selected as shown in the table below.
Using the PC utility is it possible to set the limit with a 1A granularity from 15A to 120A
During normal operation, current limiting is further enhance by the techniques described in
the following sections.
Continuous and Extended Current Limitation
The AX2500/2850 features active current limitation with a Smart Amps control algorithm.
This capability ensures that the controller will be able to work safely with practically all
motor types and will adjust itself automatically for the various load conditions.
TABLE 6. Current limit settings using the switches
Setting Continuous High Amps
030A
145A
260A
375A
490A
5 - default 105A
6120A
Position Sensor
Gear box
Position Feedback
FIGURE 15. Motor with potentiometer assembly for Position operation