![background image](http://html1.mh-extra.com/html/omron/cj1w-ma-rev-10-2008/cj1w-ma-rev-10-2008_operation-manual_742343313.webp)
286
Origin Search Operation
Section 8-2
8-2-4
Origin Search Operation
Origin Search
Operation Summary
Basically, the PCU’s origin search operation consists of the following three
steps.
1,2,3...
1.
Search for origin proximity signal
2.
Search for origin signal after detection of origin proximity signal
3.
Positioning for final travel distance to return to zero point after detection of
origin signal
Each of these steps is executed using the operation direction and speed
according to the Axis Parameters, Servo Parameters, and speed command
value for origin search as shown in the following diagram.
The origin proximity signal is not always used in the origin search operation
pattern and an origin search can be started at the zero point return approach
speed. For details on origin search operation patterns, refer to
Origin Search
Operation Modes
on page 287.
Note
(1) The operation direction for origin search is determined by the setting in
Servo Parameter
Zero Point Return Direction
(Pn816).
(2) The parameters shown above are different for G-series Servo Drives.
(3) Make sure that the same direction is set for
Origin Search Direction
in the
Axis Parameters and
Zero Point Return Direction
(Pn816) in the Servo
Parameters. Setting different directions may result in a malfunction.
The override function is disabled during origin searches.
The parameter
Final Travel Distance to Return to Zero Point
(Pn819) sets the
amount of compensation positioning used after the origin input signal has
been detected. The value is set as the relative travel distance in the origin
search direction.
When
Final Travel Distance to Return to Zero Point
(Pn819) is set to a nega-
tive or small value, the axis will decelerate to a stop, and then reverse and per-
form the set positioning.
1
0
(1)
(2)
(3)
1
0
Origin proximity
input signal
Origin input signal
(Phase Z signal)
Speed
Speed command value
Zero point return approach speed 1 (Pn817)
Zero point return approach speed 2 (Pn818)
Final travel distance to return to zero point (Pn819)
Origin search direction
Stop
Start
Origin search direction
Zero point return direction (Pn816)
Origin search direction (See note.)
(Axis Parameters)
Summary of Contents for CJ1W-MA - REV 10-2008
Page 3: ...iv ...
Page 5: ...vi ...
Page 21: ...xxii ...
Page 57: ...30 Starting Operation Section 2 2 ...
Page 97: ...70 Wiring Section 3 4 ...
Page 247: ...220 Transferring Servo Parameters Section 5 3 ...
Page 281: ...254 Standard Settings for Servo Drives Using MECHATROLINK Section 6 4 ...
Page 343: ...316 Absolute Encoder Origin Section 8 6 ...
Page 375: ...348 Linear Interpolation Section 9 7 ...
Page 423: ...396 DEVIATION COUNTER RESET Section 10 10 ...
Page 631: ...604 Additional Functions for the CJ1W NCF71 MA Appendix F ...
Page 641: ...614 Index ...
Page 643: ...616 Revision History ...