Sterlco SGBD Series Batch Gravimetric Blenders - Manual (Page 63)

BLN1-600 Chapter 4: Operation 63 of 110
The dump valve opens as soon as the “Press to Open Feeder” key is pressed. This easy feeder
clean out option also serves as a means for emptying a batch that is held in the weigh hopper
if the “Press to Open Weigh Hopper” key is pressed when the blender is stopped. To
open/close feeder numbers 2, 3, 4, 5 & 6 press the number next to “Press to Open Feeder” to
select the feeder you desire to empty and the “Press to Close Feeder” key to close the dump
valve. Touch the “Done” key to return to the recipe menu. After entering a recipe, the
operator will restart the blending system, putting it back in normal operation.
Once the operator initiates the run mode of operation, the blending system controller will
begin monitoring the mixer high-level switch. Nothing will happen until the mixer high-level
switch is uncovered. This tells the controller that the mixing chamber is capable of holding
another batch of material.
Once the mixer high-level switch is uncovered, and the weigh hopper has dumped, the system
will meter the ingredients from the supply hoppers, through the metering units, into the weigh
hopper. Each component will be metered individually to allow accurate weighing of the
material.
Each component is metered in the order specified by the “Metering Order” setup. See the
Installation & Setup chapter for further details.
Once the final ingredient specified in the recipe has been metered into the weigh hopper, the
controller will take a final weight reading of the weigh hopper. This will start the “Dump
Delay” timer. (See Page 58). Once the dump delay timer has timed out, the controller will
activate the weigh hopper dump valve, initiating the weigh hopper dump cycle.
The open weigh hopper dump door will allow the material to drop into the mixer section of
the blender. If the dump delay is set, the mixer will start before the weigh hopper dump will
open for the selected time.
The blender will sit at rest until the high-level sensor in the mixing chamber is uncovered to
start another weigh cycle. (Unless the Re-Mix timer is set to a value other than 0 and times
out to restart the mixer to run for another mix cycle.)
The level sensor is located on the back wall of the mixer chamber. If the sensor is covered
with material, the indicator light on the back of the sensor will be lit.
Once this sensor is uncovered, the indicator lamp on the back of the level sensor will go out.
This level sensor must be uncovered for approximately 1 - 2 seconds to indicate to the
controller that there is room in the mixing section to accept a batch of material.
When the controller has determined that the mixer is ready for an additional batch of
material, the controller will begin metering material into the weigh hopper assembly.
Recipe Book
In many applications, it is favorable to hold several recipes in the memory of the blending
system. The Slide Gate/Auger blender has provided for this by incorporating the
manufacturer’s recipe book software.
The recipe book is capable of holding 20 different recipes. These may be stored and recalled
by number. During this section of the manual, the operator may wish to revert to the Menu
Tree Diagram in Section 3-5 of this manual.
• Before starting Slide Gate/Auger blending systems, each ingredient hopper
in the current recipe must contain material! Virgin material must be loaded
in hopper #1 and hopper #3 should only be used for regrind!!