Omron CJ1W-NC271 - 12-2009, Operation Manual

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Phase Z Margin
Section 8-5
8-5-3 Phase Z Margin for Specific Operation Patterns
Phase Z Margin Required
for Origin Search Settings Up to a maximum of two MECHATROLINK communications cycles plus 4 ms
may be required to start searching for the origin signal after detecting the ori-
gin proximity signal for the following origin search operation patterns.
• When the origin detection method is set to any setting other than 0 (Origin
proximity input signal reversal)
• When an absolute encoder zero point position offset is set for the origin
search
When performing an origin search with one of the above operation patterns,
the following margin must be provided in the phase Z signal after the origin
proximity input signal turns ON.
Phase Z Margin Required
for External Input Signals If the limit input signal in opposite direction from origin search direction and
the origin proximity signal are close or overlapping, up to a maximum of two
MECHATROLINK communications cycles plus 4 ms may be required to start
searching for the origin signal after detecting the origin proximity signal.
In this case, the following margin must be provided in the phase Z signal after
the limit input signal in opposite direction from origin search direction turns
OFF.
Time
Servomotor rotation
Phase Z signal
1
0
Origin search operation
Origin proximity
signal
Return using JOG
at low speed.
Motor rotation
Origin proximity
input signal
Phase Z signal
1
0
Provide a margin in the phase Z signal of at least two
MECHATROLINK communications cycles plus 4 ms.
Time