Graco PrecisionMix ii, Инструкция и перечень запасных частей

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System Configuration 8–29
PrecisionMix II 3K Robotic Interface
Pressure Test and Solvent Flush the
System
Before operating the system, perform the Pressure
Test and Solvent Flush procedures on page 3–36.
See system assembly drawings on electrical schemat-
ic 309138 for more specific details.
PrecisionMix II 3K Robotic Applications
The PrecisionMix II 3K software has been designed to
work in robotic applications. These types of applica-
tions use I/O to communicate with the system instead
of the standard operator stations and user interfaces.
I/O Timing
The I/O system on the PrecisionMix II 3K needs 200
ms to process and I/O change. For this reason, it is a
good idea to space out sequential commands to the
system by at least 200 ms. An example of this would
be if the robot wanted the system to go from purge to
mix. The best way to program this transition would be
turn off the purge signal, wait 200 ms and then turn on
the mix signal. This will prevent the situation where
the PrecisionMix II 3K sees a mix and purge signal
simultaneously.
Automatic Gun Selection from I/O
Use Gun Enabled Inputs 6111 (for Gun 1) and 6121
(for Gun 2) for gun use identification.
Gun Input 6111 Gun Input 6121 Gun Selected
+ 24 VDC 0 Gun 1
0 + 24 VDC Gun 2
0 0 Guns 1 and 2
+ 24 VDC + 24 VDC Guns 1 and 2
To remove an active gun, the PrecisionMix II 3K must
complete a purge cycle or a color change to recipe 0.
The second gun may be added at any time during
operation.
Integrated vs. Non–Integrated Color Changes
The integrated color change feature simplifies the
amount of robot programming needed to perform a
color change. The reason for this is that the color
change is performed automatically. The timing issues
related to this automatic color change are handled
internally by the PrecisionMix II 3K controller. The
robot program needs to select the new recipe and then
set the color change bit (wire #5091) high for at least
200 ms. The system will then automatically color
change to the new recipe. The mix input (wire #6061)
can remain high throughout the color change as long
as the new recipe is not recipe 0. If the mix signal is
high in recipe 0, an Invalid Recipe Alarm will occur
(recipe 0 is not a valid recipe for mixing).
NOTE: Some applications will not be able to take
advantage of the Integrated Color Change feature.
The following two examples show how a color change
would be programmed for a 1 gun flow control system,
with a gun flush box, for a recipe change from recipe 1
to 2. The color change has a five second purge.
The digital inputs are shaded dark and the outputs are
shaded gray. Also note, that some tasks that typically
take place during a color change are not shown in the
following examples for clarity. These tasks include
opening dump valves, opening solvent valves, and
changing color valves. All of these tasks are handled
automatically when using the Integrated Color Change
feature.