IAI America ACON-CY - Manual (Page 82)

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5. Operation Using I/O Signals
5.3.7 Push-motion Operation
Just like you can with an air cylinder, you can maintain the actuator in a condition where the tip of the rod is
pushing a load.
Accordingly, the actuator can be used with systems that clamp, press-fit or otherwise push loads.
This function is enabled by entering a current-limiting value in the “Push” field of the position table.
* If the “Push” field contains “0,” positioning operation is applied. If the value in this field is other than “0,”
push-motion operation is applied.
The push torque [N] is determined by the current-limiting value [%] in the “Push” field.
[Basics of push-motion operation]
[1] Enter a current-limiting value in the “Push” field for the front end (Position No. 1) to define that a front end
command will be implemented as push-motion operation.
[2] In the “Positioning band” field, enter the maximum travel (relative distance) from the front end permitted
during push-motion operation.
(Consider a position error that may generate when the load is installed, as well as a possible depression if
the load is made of elastic material.)
[3] If it is possible for the system to miss the load, use the zone output signal to detect missed load. To do this,
enter appropriate values in the “Zone +” and “Zone –” fields to specify a range within which the load is
deemed to have been contacted successfully.
[4] Change the value of Parameter No. 6 (Push-motion completion judgment time), if necessary.
[5] Change the value of Parameter No. 34 (Push speed), if necessary.
(The factory setting is different in accordance with the actuator model.)
* For details on these parameters, refer to Chapter 6, “Parameter Settings.”
(Example) An example with a rod actuator with a 200-mm stroke, where the current-limiting value is set to
40%, maximum travel in push-motion operation to 20 mm, and successful contact range to
between 180 and 185 mm, is explained.
Under No. 1 in the position table, enter “160” (mm) in the “Position” field, “40” (%) in the “Push”
field, “30” mm in the “Positioning band” field, “185” (mm) in the “Zone +” field, and “180” (mm) in
the “Zone –” field.
Example of position table
Positioning
band [mm]
Position
[mm]
Push
[%]
Comment
Zone +
[mm]
Zone –
[mm]
Rear end (Standby position)
Front end
Intermediate point
For the relationship of push torque and current-limiting value, contact IAI.