IAI America ERC3 - Manual (Page 297)

Chapter 5 Power-saving Function (Automatic Servo-of
f and Full Servo Functions)
5.1 Positioner Mode 1 and 2
287
Chapter 5 Power-saving Function (Automatic Servo-off and
Full Servo Functions)
ERC3 actuator possesses the automatic servo OFF function and full servo function to reduce
the power consumption while the actuator is stopped. When using the power saving function,
read the explanation in this section narrowly to understand well so there is no trouble in safety
and operation. Automatic servo OFF function is not available in Pulse Train Mode.
5.1 Positioner Mode 1 and 2
Automatic Servo-off function automatically turns the servo OFF in certain time after positioning
process is finished. The next positioning command is issued to turn the servo ON automatically
and achieve the positioning. No holding current flows in the stop state to allow the power
consumption to be saved.
3 types of patterns can be set for the time since positioning complete till servo turned OFF, and
either one can be selected.
In the full servo function, the power consumption can be reduced by having a servo control to
save the current during a stop.
The power saving function applies the power saving method set in Parameter No.53 or “Stop
Mode” in the position table depending on the stop condition of the actuator.
Positioner Mode 1 PIO Pattern 0 PIO Pattern 1, 2
Positioner Mode 2 PIO Patterns 0 to 4 PIO Pattern 5
Servo-on complete after power
being supplied
(before positioning to target position)
Depends on setting in
Parameter No.53 (Stop
Mode setting in position
table is invalid)
Home return completion
(before positioning to target position)
Power saving function
executed with the setting
held in Parameter No.53
(Stop Mode setting in
position table is invalid)
St
op
Conditio
n
Positioning complete to target
position set in position table
Depends on setting of “Stop Mode” in each position
number (Setting of Parameter No.53 is invalid)
 
Caution:
(1) Do not use this function if the automatic servo OFF is followed by pitch feed
(relative movement).
Servo ON/OFF may cause slight position shift to occur. If position shift occurs due
to external force during servo OFF, positioning to the correct position is disabled. It
is because pitch feed is operated based on the position at start used as the base
point.
(2) Automatic Servo-off Function is not effective while in pressing operation. Do not
use. It becomes effective at completion of positioning. In pressing, the function
becomes effective only when miss-pressing occurs (the status at the completion of
operation without pressing is the same as that at the completion of positioning).
No retaining torque is provided in automatic servo-off. The actuator can move with
an external force. Pay attention to the interference to the peripherals and the
safety in the installation.