Setup - Dual-Phase Command Mode - Aerotech BA10 SERIES User Manual

Installation and Operation
2-14
Starting with a zero input command signal, apply power to the amplifier. If the motor
spins uncontrollably, remove power and switch the polarity of the tach input signal. If an
encoder is being used, switch the sine and cosine input signals. Verify compliment signals
(sin & sin-N, cos & cos-N) are of correct phasing.
Again, apply power to the amplifier. If the motor begins to oscillate, turn the TACH pot
CCW until the oscillation stops. The GAIN and TACH potentiometers can be adjusted to
provide maximum stiffness on the motor shaft.
If the desired stiffness is unattainable, the components connected to personality
module RCN1 pins 8-9 and 7-10 may be need to be changed.
The BALance pot is used to cancel any bias in the internal or external control circuit that
would cause the motor to rotate when the input command signal is zero.
If the TEST switch is closed the effects of the BALance pot are greatly magnified. This is
useful when a test bias signal is desired (for velocity or torque modes) to be applied to the
amplifier without introducing an external command signal.

2.5.3. Setup - Dual-phase Command Mode

To setup the pre-amplifier circuit for use in the dual phase mode, configure the BA
amplifier as follows:
JP11 and JP13 are set to 2-3
JP3, JP5, JP15, and JP6 are set to 1-2 (default).
This mode is used with brushless motors only. Refer to Figure 2-9 for dual phase
command configuration.
Aerotech, Inc.
BA10/20/30 Series User's Manual
Version 1.6