Sterlco SGBD Series Batch Gravimetric Blenders - Manual (Page 60)

BLN1-600 Chapter 4: Operation 60 of 110
Mixer Dump Time
The mixer dump time is the amount of time the knife gate below mixer’s valve remains open
to allow blended material to exit the blender.
To view and change the current mixer dump time settings, enter the Setup menu and select
the “Mixer and Dump Setup” screen. Press the field next to “Mixer Dump Time” to set the
operation of the Dump Valve.
The dump timer on the dump valve has a default time of six (6) seconds. This time can be
adjusted to optimize the blender cycle time.
The timer should be set to close the dump valve shortly after clearing the high-level sensor.
This time can vary due to material flow characteristics, and the size of the batch that is
programmed into the blender control. Experimentation with this setting can allow the
operator to determine the best cycle for the material being mixed.
Alarm Flags
An alarm message will be shown if any alarm condition occurs. A message will pop up on
the screen until the alarm condition is resolved. The operator can press “OK” on this pop-up
to hide the screen temporarily, but if the alarm condition is still unresolved, then the message
will reappear after a short delay. During an alarm condition, not only will a visual alarm
show up on the screen but also an audible alarm will sound. The audible alarm will sound for
10 seconds and reappear every 30 seconds until the cause of the alarm is resolved. The
following is a list of all alarm names and descriptions:
Hopper 1-6 Out of Material: This alarm indicates that a hopper is out of material and
signals the operator that they should check the resin system.
Figure 41: Typical “Out of Material” Alarm Screen
Max Hopper Weight Exceeded, check batch size: This alarm indicates that the weight in
the weigh hopper has exceeded the maximum allowed weight. This alarm can happen if the
operator changes material density and does not perform a feeder calibration, but will usually
be automatically fixed after the first batch. As long as this alarm doesn’t continue to
reappear, then the operator should not be concerned. If the alarm continues to occur, then the
operator should have maintenance check the blender.
Figure 42: Typical “Maximum Hopper Weight” Alarm Screen
Calibration Error, Clean out hopper and check calibration: This alarm indicates that the
maximum empty weight for the weigh hopper has been exceeded. The blender will
automatically tare up to 0.25 lbs of material, but if this weight is exceeded, then an alarm will
appear. This alarm is most commonly caused by a build up of sticky material in the weigh
MAX HOPPER
WEIGHT EXCEEDED
check batch size