Baldor BSC 7107 DC Section 3 Adjustments

Section 3Adjustments

Adjustments 3-1

The current limit adjustment is factory set at 10 AMPS and you should

not have to increase this setting for the Series BSC 7107 control.

Rotating the I Limit potentiometer on the upper board CCW decreases

the current limit.

To calculate motor current, refer to Figure 2-2 and measure the voltage

(VTP) at the “Scaled motor current test point”. The voltage should be

770mV for a 7 AMP motor.

VTP

The correct setting of the I Limit potentiometer is 125% of the FLA rating

of the motor.

1. Preset the I Limit pot fully CW for maximum FLA.

2. Apply power and run the motor at full or normal running speed.

3. Load the motor to 125% of its FLA rating (or the desired maximum

load).

4. Rotate the I Limit pot CCW (clockwise) slowly until the measured

motor current begins to decrease.

5. Slowly rotate the I Limit pot CW to just obtain the 125% FLA

measurement.

Note: Do not use the Current Limit trimpot as a torque control or to

reduce the speed of a motor.

Caution: Keep the average continuous DC current draw

under 7 amperes, and make sure the motor is rotating. A

stalled brushless DC motor can quickly overheat the control

and/or the motor resulting in damage to either or both

devices.