Delta ASDA-A3 Series User Manual page 566

ASDA-A3 Motion Control
 Empty pack prevention mechanism
In packing machine applications, when the slave axes (wrap feeder and cutter) operate one
cycle, the master axis (chain conveyor) travels one fixed packing distance. Use the two sets of
E-Cam DO, [0x18]CAM_AREA1 and [0x1A]CAM_AREA2, to set the empty pack detection
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position and the slave axis pause position.
First set of DO: [0x18]CAM_AREA1:
When DO.CAM_AREA1 signal is on, the controller has to read the signal from the empty pack
prevention sensor. If the sensor sends a signal, it means there is a packing content on the chain
conveyor within this packing distance. If the sensor sends no signal, it means there is no
packing content within this packing distance and requires to enable the empty pack prevention
mechanism. Set the distance between the detection spot and the cutting spot for the controller.
If the detection spot is 5 fixed packing distances away from the cutting spot, then the controller
needs to complete the packing for the previous five packs. After DO.CAM_AREA2 is on, the
controller calls the PR command to execute Macro #10 to enable the empty pack prevention
mechanism.
Second set of DO: [0x1A]CAM_AREA2:
It is for setting the slave axis pause position. Generally, this setting should not affect the master
axis motion. It is suggested that the slave axis pauses at the 0° position in the E-Cam curve.
Since the slave axis requires to accelerate from a stop to the operation stage, you can use the
acceleration curve to have the slave axis follow the E-Cam curve closely after the slave axis
resumes operation.
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