ASDA Series Application Note Application Examples
March, 2015 3-101
3.8 Application Example of Packing Machine with Phase
Alignment Function
3.8.1 Instruction
This chapter aims at the application of horizontal packing machine which uses the material
feeding axis as master axis and film feeding axis and cutter axis as slave axes. With cam
positioning and synchronous capture axis, it fulfills the function of modification by mark tracking.
In addition, this chapter also introduces the function of empty pack skip and cutting skip by
macro. The application examples of ASDA-A2 on horizontal packing machine has already been
described in Chapter 3.6. In Chapter 3.6, the film feeding axis is the master axis and the cutter
axis and material feeding axis are regarded as slave axes. In production line, packing machine
connects to the other devices via the material feeding axis. Therefore, when the speed changes,
the packing machine can still work easily.
3.8.2 System Configuration
The packing system includes three parts, the master axis and two slave axes. See Figure 3.8.1
below, the material feeding axis is the master axis. When delivering the package, it will transmit
pulse and command the slaves. Film feeding axis is one of the slaves and delivering the
wrapping film is its main task. Another slave is the cutter axis, which controls the cutting time.
Four sensors are used in this application. Synchronous capture axis sensor detects the chain of
the master axis and the signal will be sent back to DI7 of the two slaves. The purpose is to
monitor the operation of the master axis via slaves. When problems occur such as skid, pulse
leaking or the different distances among chains, slaves can fix it in time. Cam positioning sensor
is used for detecting the mark of the wrapping film. The detected signal can be sent back to any
DI (except DI7) on film feeding axis. It is used for adjusting the position automatically according
to the relationship between the read signal and cam curve. Cutting skip sensor is installed in
front of the cutter axis. The purpose is to check the package position in order to prevent the
cutting knife cutting the content in the package when operating. Empty pack skip sensor is
installed in front of the packing area in order to check if there is any unpacked item. If yes, before
the unpacked item reaches the packing position, the slave will stop operating for a cycle. Thus, it
can reduce the waste of materials.
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