Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026
SMA5005 & SMA5015 MANUAL
PROCEDURE:
1. Apply the main power and fan power. Visually confirm an “O” on the display. Depending on
the configuration of the Inhibit, Reset and +/-Limits, it may be necessary to make appropriate
connections to those terminals before the amplifier will be enabled and energize the motor.
2. Slowly turn the Loop Gain (RV7) pot CW. The Motor should be stopped or turning slowly. Set
the Balance (RV3) for 0V at J1-6 (MTR I).
3. Connect an oscilloscope to J1-6 (MTR I) and a battery box to J1-3 (J1-4 is common for both).
The voltage on J1-6 is a function of motor current: 1V = 10A. While applying a step input
voltage, adjust the Current Limit (RV6) for the desired peak current. If the desired peak
current cannot be achieved with the Current Limit pot full CW, increase either the input signal,
Aux Gain (RV2) for single-ended input or Differential Gain (RV1) for differential input.
4. With the battery box still connected at J1-3 and J1-4 for single-ended input (or if your system
uses the Differential input, move battery box to J1-1 and J1-2), set the battery box for a known
DC voltage. Apply ±input signal pulses and adjust the AUX (signal gain) (RV2) pot or (RV1 for
differential input) to obtain the desired current gain of the amplifier.
5. If the motor is rotating in the wrong direction for a given input polarity, remove the power and
reverse the motor leads.
6. Remove the battery box, and repeat step 2.
7. Calibration complete. Reconnect signal wires.
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F. Calibration of the Current Mode Amplifier (SMA5015 Series):
The amplifier in this configuration, receives an analog, bi-polar input command which is
proportional to the required motor current (motor torque). The following potentiometers (pots) will
be set during calibration: (Note: RV7 is a single turn pot and RV1-RV6, RV8-RV10 are 10-turn
pots.)
Pots
Name of Pot
Notes
RV1
Differential Gain,
SIG
Sets the input voltage to velocity ratio for differential signal input.
RV4
Tach Gain,
TACH
Sets the DC tachometer gain.
RV7
Loop Gain,
LOOP GAIN
Used to shut off uncalibrated amplifiers. When the loop gain is fully
CCW, no current is delivered to the motor.
RV2
Signal Gain,
AUX
Sets the input voltage to velocity ratio for single-ended signal input.
RV3
Balance,
BAL
Used to null any offset in system.
RV5
Compensation,
COMP
Used in conjunction with tach. gain to set the system bandwidth.
RV6 Current Limit,
I LIMIT
Sets the maximum motor current. Shipped set CCW (min. current).
Note: RV9 and RV10 are factory set and should not be adjusted. Adjusting these pots voids
warranty.
