Aerotech BAL LINEAR AMPLIFIER SERIES, Руководство пользователя

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BA Linear Series User’s Manual Installation and Operation
Version 1.5
Aerotech, Inc.
2-9
2.5.2. Setup – Velocity Command Mode
For this mode, a velocity feedback signal is required. This feedback signal can be derived
from two sources. From an analog DC tachometer that is connected to the +TACH pin or
from an incremental encoder that is connected to the sine and cosine pins (refer to Figure
2-2). To setup the pre-amplifier circuit for use in the velocity command mode, configure
the BAL amplifier as follows:
•
Place SW4 position 6 (mode) to open
•
Place SW4 position 5 (test) to open (default)
•
SW4 positions 1 through 4 selects current limit
•
Potentiometers “INPUT”, “GAIN”, “BALance”, and “TACH” adjust
pre-amplifier gain and offset.
For most applications under the velocity command mode, the preferred starting point for
setting the three gain pots is as follows:
INPUT pot - 1/3 CW from full CCW
TACH pot - full CW
GAIN pot - full CW
These initial settings will usually generate a stable system if it is assumed that the
tach feedback gain is around 6 volts/Krpm, or if an encoder is used and the line
resolution is between 1,000 and 1,500 per revolution.
•
JP7 set to 1-2 for encoder or 2-3 (default) for tachometer velocity feedback
•
JP9 and JP13 set to 1-2 (default)
•
JP3 set to 1-2 (default) for brushless motor operation or 2-3 for brush motor
operation
•
JP10, JP12 set to 2-3 and JP4 set to 1-2 for zero (0) degrees commutation
(default) or JP10, JP12 set to 1-2 and JP4 set to 2-3 for thirty (30) degrees
commutation (brushless motor operation only).
•
Set JP8 to 1-2 (default)