
B-65270EN/05 4.SERVO FUNCTION DETAILS
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- Notes on the position feedback switching function
• Reference position return operation and positioning are
performed with the main axis only. Note, however, that during
movement (command ≠ 0), position feedback on the driving side
is used for position control. (A switching time constant is to be
specified with the parameter.)
• Adjust the switching time constant if a shock is observed at the
time of position feedback switching.
• Basically, the position feedback switching function assumes
setting of semi-closed loop mode.
When the position feedback switching function is to be used with
full-closed loop mode, divide the scale signal into two to apply
the same signal to both the main and sub-sides.
Moreover, set full-closed loop mode for the main and sub-sides
as well.
NC
Separate main axis
Separate sub-axis
Feedback cable
Scale
Fig. 4.18.7 (b) Cable on the scale side when the position feedback
switching function is used (full-closed loop)
NC
Separate main axis
Separate sub-axis
Feedback cable
Scale
* It is unnecessary to branch out.
Enable the full-closed loop feedback sharing function.
Fig. 4.18.7 (c) Example of using the full-closed loop feedback sharing
function together with the position feedback switching function
• Full-closed loop feedback sharing function
For serial and other cables for which the feedback cable cannot
be separated into two, this function allows a single separate
feedback to be shared by the main axis and the sub-axis in a
software manner.
#7 #6 #5 #4 #3 #2 #1 #0
1940(FS15i)
FULLCP
2200(FS30i, 16i)
FULLCP(#1) 1: A separate position feedback is shared by the main axis and the
sub-axis.
(To be set for the sub-axis only.)