465
SECTION 9
Establishing the Origin
This section explains how to search for and establish the origin using either an incremental encoder or an absolute
encoder, and gives a general overview of absolute encoders.
9-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
466
9-1-1
Using Incremental Encoders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
466
9-1-2
Using Absolute Encoders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
467
9-2
Input Signals Required for an Origin Search . . . . . . . . . . . . . . . . . . . . . . . . .
468
9-3
Origin Search Methods and Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
468
9-3-1
Origin Search Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
468
9-3-2
System Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
469
9-4
Origin Search Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
470
9-4-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
470
9-4-2
CW/CCW Deceleration Method and the Initial Origin
Search Direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
471
9-4-3
Origin Search Patterns Set by Origin Search Method . . . . . . . . . . .
472
9-5
Absolute Encoders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
479
9-6
Setting the Origin With an Absolute Encoder . . . . . . . . . . . . . . . . . . . . . . . .
480
9-6-1
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
480
9-6-2
Setting Up the Absolute Encoder. . . . . . . . . . . . . . . . . . . . . . . . . . .
480
9-6-3
Moving to the Origin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
481
9-6-4
Setting the MC Unit Absolute Origin . . . . . . . . . . . . . . . . . . . . . . .
482
9-7
Absolute Encoder Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . .
483
Summary of Contents for CS1W-MC221 -
Page 1: ...Motion Control Units Cat No W359 E1 04 CS1W MC221 V1 421 V1 OPERATION MANUAL ...
Page 2: ...CS1W MC221 V1 421 V1 Motion Control Units Operation Manual Revised February 2008 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 11: ...xii ...
Page 15: ...xvi ...
Page 19: ...xx ...
Page 27: ...xxviii Conformance to EC Directives 6 ...
Page 133: ...106 Installation Section 2 2 2 2 4 Dimensions CS1W MC421 CS1W MC221 ...
Page 173: ...146 Connecting Peripheral Devices Section 2 7 ...
Page 227: ...200 Command Area Section 3 6 ...
Page 351: ...324 Interface Specifics Section 5 4 ...
Page 513: ...486 Absolute Encoder Interface Specifications Section 9 7 ...
Page 575: ...548 Error Log Section 12 6 ...
Page 589: ...562 Performance Appendix A ...
Page 655: ...628 Control Bit Flag Timing Charts Appendix E ...
Page 683: ...656 Origin Search Patterns Appendix F ...
Page 685: ...658 Encoder Divider Rate and Rotation Speed for OMRON Servo Drivers Appendix G ...