Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 199)

Section
4C
4C-1
Connecting the 4-axis Servo Module
This section covers the integration of the 4-axis analog/1394 and digital
servo module components. A section is devoted to each of the following
drive components:
For Information: See Page:
How the Digital Servo Card Works 4C-1
Digital Servo Module (8520-ENC4) 4C-4
How the Analog/1394 Servo Card Works 4C-5
Analog/1394 Servo Module (8520-ENC4) 4C-8
Connecting Axes to the Servo Module 4C-9
Servo Module Connectors and Pin Assignments 4C-9
8520-ENC4 Servo Module Specifications 4C-15
8520-SM4 Servo Module Specifications 4C-16
Servo Module Battery Replacement 4C-17
Servo Module LED Indicators 4C-19
Servo Module Test Points 4C-19
Encoder Termination Panel 4C-20
Feedback Devices 4C-21
Wiring a Touch Probe to the Servo Module 4C-27
There are two typical digital servo drive configurations for the control.
The typical mill configuration has 3-axes, each having a servo motor and
feed back device, and a 1-axis analog open loop spindle motor. The typical
lathe configuration has 2-axes, each having a servo motor and feedback
device, and a 1-axis analog open loop spindle motor with position
feedback.
The servo module functions as a high speed servo processor. It is installed
in the component enclosure. The digital servo amplifier translates
low-level PWM signals from the servo module to the power levels
necessary to drive the servo motors.
Current feedback data is read from the current sensors in the digital servo
amplifier and returned to the servo module. This data is processed by the
servo module to maintain velocity and position control, according to
module, AMP, and part program constraints.
4C.0
Section Overview
4C.1
How the Digital Servo Card
Works