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4.3 .5 Current Limit - Although it will probably not be
necessary to make any adjustment in the factory-set cur -
rent limit value of 150% of rated load, it is possible to
change this governing value. (Individual application speed
changes or load changes on sustained overloads may
require readjustment . Also, applications requiring torque
limiting or accelerating of high inertia loads may require a
change from this value .)
To reduce the torque output of the drive, turn the Current
Limit Potentiometer CCW. Note , however , that turning
CCW too far may prevent the drive accelerating to the
desired speed .
4.3.6 IR Compensation - IR (voltage)Compensation is a
feature which makes up for the armature resistance of a
17
motor that causes a drop in speed as the load is increased .
The IR Compensation Potentiometer is factory-set at zero .
The IR Compensation feature can be adjusted between 0
and 12% of rated load and is used only for a voltage regula-
tion mode. When using a tachometer or CEMF feedback,
the IR Compensation Potentiometer must be turned com-
pletely CCW.
CAUTION : If the IR Compensation Potentiometer is
set too high, motor speed rising characteristics may
result. Instab ility and oscillation in motor speed will
result.
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