Delta ASDA-A3 Series User Manual page 563

Motion Control
You can install a sensor on the packing machine to avoid empty packs or miscutting the content
when the content is in the wrong position. In the empty pack prevention mechanism, the empty
pack detection sensor is installed on the chain conveyor and sends signals to the controller.
Next, the controller counts and calculates the timings for triggering the empty pack PR path of
7
the two slave axes and enabling Macro #10, thus avoiding generating empty packs.
For the miscutting prevention mechanism, install the miscutting detection sensor on the cutting
device. By doing so, the sensor can directly return the signals to the servo drive controlling the
cutter through the digital input point. When detecting the packing content position error, the
sensor triggers the miscutting prevention PR path and enables Macro #F to avoid damages to
the machine or cutter caused by content position errors while cutting.
The electrical framework for empty pack prevention and miscutting prevention is as shown in
Figure 7.3.11.3. When an error occurs and causes the machine to stop and the slave axis actual
position is inconsistent with the E-Cam phase, use Macro #D to re-align the E-Cam phase.
Details about the error detection mechanisms are described in the following sections (Empty
pack prevention mechanism, Miscutting prevention mechanism, and Reset mechanism after
alarm stops).
Controller
Empty pack signal is sent to
the PLC for calculating the
proper timing to trigger the
empty pack prevention PR
command
7-160
Triggers empty pack prevention PR command by DI event trigger
Chain conveyor
Empty pack
sensor
Figure 7.3.11.3 Horizontal packing machine error detection framework
Wrap feeder
Triggers
miscutting
prevention PR
command by DI
event trigger
Miscutting prevention sensor
ASDA-A3
Cutter