![background image](http://html1.mh-extra.com/html/omron/cs1w-mc221/cs1w-mc221_operation-manual_742361039.webp)
12
Control System Configuration and Principles
Section 1-4
1-4
Control System Configuration and Principles
1-4-1
Servo System
The servo system used by and the internal operations of the MC Unit are
briefly described below.
Semi-closed Loop System
The servo system of the MC Unit uses a semi-closed loop system. This sys-
tem is designed to detect actual machine movements by rotation of the motor
in relation to a target value. It computes the error between the target value
and actual movement, and zeroes the error through feedback.
Semi-closed loop systems occupy the mainstream in modern servo systems
applied to positioning devices for industrial applications.
Internal Operations of the
MC Unit
Commands to the MC Unit, speed control voltage to the servo driver, and the
feedback signals from the encoder are described in the next few pages.
1,2,3...
1.
The error counter receives a target position in units of encoder pulses. This
is called a pulse string.
2.
The error counter is directly connected to the D/A converter where the
pulses received by the error counter are converted to analog voltages.
These analog voltages are sent to the servo driver as the speed control
voltages.
Table
Ball screw
Decelerator
Actual
movement
Target value
Position controller
Encoder
Servomotor
Desired position
Pulse string
Error
counter
D/A
converter
Servo driver
Servomotor
Speed
feedback
Encoder
Position feedback
Feedback pulses
Speed
control
voltage
Содержание CS1W-MC221 -
Страница 1: ...Motion Control Units Cat No W359 E1 04 CS1W MC221 V1 421 V1 OPERATION MANUAL ...
Страница 2: ...CS1W MC221 V1 421 V1 Motion Control Units Operation Manual Revised February 2008 ...
Страница 3: ...iv ...
Страница 5: ...vi ...
Страница 11: ...xii ...
Страница 15: ...xvi ...
Страница 19: ...xx ...
Страница 27: ...xxviii Conformance to EC Directives 6 ...
Страница 133: ...106 Installation Section 2 2 2 2 4 Dimensions CS1W MC421 CS1W MC221 ...
Страница 173: ...146 Connecting Peripheral Devices Section 2 7 ...
Страница 227: ...200 Command Area Section 3 6 ...
Страница 351: ...324 Interface Specifics Section 5 4 ...
Страница 513: ...486 Absolute Encoder Interface Specifications Section 9 7 ...
Страница 575: ...548 Error Log Section 12 6 ...
Страница 589: ...562 Performance Appendix A ...
Страница 655: ...628 Control Bit Flag Timing Charts Appendix E ...
Страница 683: ...656 Origin Search Patterns Appendix F ...
Страница 685: ...658 Encoder Divider Rate and Rotation Speed for OMRON Servo Drivers Appendix G ...