6. Operation of ELECYLINDER
343
Judging completion of pressing operation
The operation monitors the torque (current limit value) in percent in “Push force” of the position
data and turns LS0 or LS1 signal ON when the load current satisfies the condition shown
below during pressing. LS0 or LS1 signal is turned ON at satisfaction of the condition if the
work piece is not stopped.
(Accumulated time in which current reaches pressing value [%])
- (Accumulated time in which current is less than pressing value [%])
≧
255ms
Caution: (1) The pressing operation speed is 20mm/s.
(2) The work piece is pressed after the pressing is completed. The work piece may
moves backward or forward. An alarm should be generated and the actuator
stops when it gets pushed back to a position in front of the approaching position.
When the work piece gets moved in the pressing direction, LS0 and LS1 turn
OFF if the load current goes down to the set current limit (pressing [%]) or below.
It should be judged as a miss-pressing if the moving amount goes straight to the
stroke end.
(3) An error will occur when hitting to a work piece during approach operation.
Current
Time
Pressing [%]
Operation
start
Approach end
Pressing start
200ms 20ms 75ms
295ms
200ms + 75ms - 20ms ≧ 255ms
Pressing complete (LS0 or LS1 output)
Contactiong work piece
Decrease in current due to
movement of work piece
Forward End and
Backward End Signals
ST0 and ST1
(Controller → PLC)
Turned OFF by
turning LS* ON
Start Signal
ST*
(PLC → Controller)
Operation of Actuator
Not turned ON for
miss-pressing
Approach Operation
Pressing
operation
Pressing
completion
Pressing operation up to
pressing start position
Stop of
pressing
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