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7-4 Origin Search Patterns
This section provides basic examples of origin search patterns with the Origin
Search Method set to Reverse mode or One Direction mode. Operation will vary
depending on the position of the workpiece when the origin search is executed.
7-4-1 Basic Origin Search Pattern
These origin searches are performed with an origin proximity switch and the ini-
tial search direction set to CW. Operation will vary and errors might occur with
different limit switch, origin proximity switch, and Z-phase input timing. Refer to
Appendix B Additional Origin Search Patterns for more examples.
Limit switches
Origin proximity switch
Z-phase signal
Speed
Origin search high-
speed feed rate
Origin search low-
speed feed rate
Origin search start Machine origin
(1)
(2)
(3)
CWCCW
Description There are three steps involved in this origin search.
1, 2, 3... 1. When the origin search is executed, the axis is moved in the specified direc-
tion at the origin search high-speed feed rate.
2. When the origin proximity switch input is received, the search speed is
reduced to the origin search low-speed feed rate.
3. After the origin proximity switch input goes OFF, the machine origin is fixed
at the position where the Z-phase signal goes ON. The control voltage drops
to zero at this point.
The axis is then moved by the Reference Origin Offset amount with PTP
control and the resulting position is fixed as the reference origin.
Origin Search Patterns
Section 7-4
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