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Gravimetric Batch Blenders w/Mitsubishi Control Chapter 3: Installation 49
the feeder. To perform a feeder calibration, the operator must enter the “Feeder
Calibration” screen (see menu structure), select a feeder number, then touch “Press Here.”
The feeder calibration will start automatically and will notify the operator when complete. If
the operator so desires, they can repeat the process by entering in a new feeder number and
touching the “Press Here”button.
If the blender does not see enough weight gain during the calibration process or if the weigh
hopper reaches maximum weight, then an error is given and the calibration is a failure.
Another useful feature on the “Feeder Calibration” screen is the ability to manually enter in
the “weight per second” values. This increases the blender learning process and the values
can be recorded for future blending.
Mix Timer
The mix timer is the amount of time that the mix motor will mix the material after it has
entered the mixing section of the Slide Gate/Auger blender. The timer has a range of 1 to 999
seconds.
To set the value of the mix timer, the user must gain access to the Setup Menu. After entering
the Setup menu, the user must select “Mixer and Dump Setup.”
Selecting “Mixing Time” from the “Mixer and Dump Setup” menu will allow the operator to
view the current time setting for the mix timer and to adjust it as needed.
The mix timer is set to a default time of 10 seconds. This time can be adjusted up or down
depending on the amount of mixing needed for the materials being blended.
It is recommended that the mix time be held to the minimum, as segregation can occur from
over-mixing if the material bulk density and pellet configuration varies with materials in the
particular blend being processed.
Re-Mix Timer
In some applications, the Slide Gate/Auger blender will require the use of the re-mix timer.
Some materials tend to separate if they are mixed too long. This is possible when a
processing machine is running at a rate significantly below the capacity of the blender.
With external vibration, the heavier pellets will tend to flow to the bottom of the mix chamber
before the lighter material. This will occur even though the mixer is in a static mode. By re-
mixing occasionally, this situation will be prevented.
The re-mix timer will start another mixing cycle if the blender has been idling long enough
for the re-mix timer to time out. The re-mix timer may be set on the “Mixer and Dump Setup”
screen from 1 to 999 seconds. Setting the re-mix timer to zero will disable this function.
Go Back to Setup
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