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HARSFEN0602
The software command to the roller is set as point to point, to correct the roller position for the next arriving
box.
That way the printing is synchronized to the box.
Figure 31: Print On A Moving Box Application
At the time of auxiliary homing (when a new box arrives at the sensor), the external reference jumps by
PY*FR[3]. The software command to the roller jumps in parallel by –PY*FR[3], so that the roller continues
to move normally.
Programming the ##AUTO_HM routine as
function AUTO_HM()
PA=0;BG;
return
Will position the roller phased correctly with respect to the next coming box.
12.3 The Stop management
12.3.1 General description
The "Stop Manager" block has the following functions:
Stop the motion upon sensing a "Stop" switch, or upon sensing a limit switch (RLS
or FLS).
Protect against discontinuity it the controller's command. A discontinuity can occur
due to:
o A switch stops the motion abruptly.
o An application error (An absolute motion mode like PVT is started with bad
initial conditions, or PVT generates position command out of the modulo
range of the feedback sensor)
Limit the magnitude of the controller's command to the maximum allowed range.
This is necessary since even if the software command is generated within the
permitted limits, and the external command is within the permitted limits also, their
some may be out of the permitted limits.
The Stop Manager prevents the position reference generator from driving the motor to
undesired places. The stop manager does not affect the reference generator.
While this feature enable
Next box box
Conveyer speed encoder
Painting roller
Amplifier
Auxiliary
encoder
input
Feedback encoder input
Motor
Sensor
Auxiliary
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