Instruction manual

Programming & Adjustments

4.1 Programming Jumpers

J1 Field Current (power board)

The unit has 5 ranges of current. They are 2,4,6,8,10 or 15, 20, 25, 30 & 35A. Set the

jumper appropriately for the motor used.

J2 Loop Response (control board)

This setting is a function of the motor size. Smaller motors have less inductance and may

need the FAST setting. Large motors may need the SLOW setting. The SOT terminals

are provided for use in special applications.

J3 Control Mode (control board)

AUTO setting is used with Crossover operation. MAN is used for Manual operation with

the TB1 pot.

J4 Arm Volts (control board)

Set this according to the armature voltage for the Crossover Mode.

J5 Tach Volts (control board)

Set this according to the maximum DC tachometer voltage expressed as follows:

Max Voltage = Max extended RPM x (Tachometer volts per 1000 RPM rating)

1000

4.2 Adjustment Pots

P1 TACH GAIN

This pot sets the scaling of the tach output relative to the voltage from the tachometer on

the motor.

P2 TACH OFFSET

This sets the output to zero with no voltage from the tachometer.

P3 MIN CUR

This sets the lowest level of field current (minimum current) when in the crossover mode

or when the TB1 pot is at full CCW in the variable mode.

P4 MAX CUR

This sets the highest level of field current (maximum current) when in the crossover

mode or when the TB1 pot is at full CW in the variable mode.

P5 CROSSOVER

This sets the armature voltage level at which the field current begins to reduce (begins

field weakening).

P6 FIELD CURRENT METER CALIBRATE

Factory set – do not adjust.