22
BD SERVO DRIVES USER GUIDE
Setting Up the Drive
Application Types
There are two basic types of applications (described below) for the BD servo drive. Each type of
application requires a different type of tuning.
Velocity Following
For this application, it is required that the axis follows programmed velocities as accurately as
possible. A high amplifier gain is needed so that the small signals resulting from small velocity
errors will produce large correcting torques.
Torque Amplifier
In this type of application, the torque produced is required to be proportional to the input voltage.
Low amplifier gain is needed in this case. The torque produced directly relates to the motor
current. For example, a gain of 1A/Volt would produce 1A of motor current for each volt at the
input (
±
10V at the input would produce
±
10A of motor current).
Initial Precaution
Before starting to tune the drive ensure that the motor mechanism is clear of obstructions.
Position the mechanical system at the mid-position of its total travel. Do not allow the motor to
remain unstable for more than a second or two.
Setting the Drive Bit Switches
Depending on how you want to use the drive, you may need to change some of the factory-set
bit switches. The factory settings shown in Figure 3-5 are suitable for the MD motor only.
Curr. Limit
Reset Pull-up/down
Vel./Torque Amp
Enc. Resolution
Comm. Enc. Pull-up
Motor Pole No.
12
3
4
5
6
78
ON
Figure 3-5. Bit Switch Settings
Summary of Contents for BD-E Series
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