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INTELLIGENT ACTUATOR
Appendix
Synchro Function
1. Common Items (Applicable to both the absolute specification and incremental
specification)
Synchro axes consist of a master axis and a slave axis. The axis with the smaller axis number becomes
the master axis. A combination of master-axis and slave-axis numbers is set in axis-specific parameter No.
65. The mating synchro axis is set for each axis. (If the axis is not a synchro axis, “0” is set.)
Example) 2-axis controller
(The settings of other parameters vary partially between the absolute specification and the
incremental specification.)
Movement commands in the program are valid only for the master axis. The position data of the slave axis
will be ignored.
Only the master axis executes home return (including home return following an absolute reset).
Example)
HOME 1
(Do not perform home return on an absolute controller, except after an absolute reset.)
As a rule, the synchro function must be implemented by coupling the master-axis and slave-axis sliders
using a bracket, etc. Consider the relative positioning of the master-axis and slave-axis sliders so that the
slave slider will not contact the mechanical ends during home return or full-stroke movement.
2. Incremental Specification
With the incremental specification, the relative positioning of the master-axis and slave-axis sliders
remains fixed while the power is on. (If the sliders were moved while the power was turned off, synchro
movement will begin from the positions after the movement.)
Absolute reset is not performed on an incremental controller. Home return must be executed at software
reset after the power is turned on.
3. Absolute Specification (When both the master axis and slave axis are of the absolute
specification)
An absolute reset is performed after the relative positioning of the master axis and slave axis is
determined. Even when the sliders were moved while the power was turned off, the positions will be
corrected automatically when a servo ON (SVON) command is executed. (The slave slider will move to
the displayed coordinate position of the master slider in a fine-drive mode.)
If your controller is of the absolute specification, refer to “ Absolute Reset of A Synchro Controller” on
the next page.
Master axis (one with the smaller axis number) Slave axis
Axis number of mating axis
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