MAGUIRE Gravimetric Gateway LineMaster Installation Operation & Maintenance page 10

Maguire Products, Inc.
LineMaster
®
Overview - XC-1 LineMaster Throughput Control (lb/hr or kg/hr)
Monitors throughput - Adjusts extruder drive speed to maintain product weight per hour
aspc0910
LIW w/ XCC
EXTRUDER
M
XCD-X
Product
Drive Speed Control
Component Installation
The system is comprised of a mass flow hopper assembly, a controller with operator interface and
a drive speed control package.
The mass flow hopper assembly is mounted on the throat of the extruder. A weigh hopper
suspended from a set of load cells provides the material flow data to the LIW controller. The
extruder drive control package, which includes a digital potentiometer to replace the existing
analog extruder speed pot, is mounted in the control cabinet and monitors and controls the signal
to the extruder drive.
Principal of Operation
The XC-1 Extrusion Throughput Control System is designed to maintain a products weight over
time by monitoring the material consumption of the process through the mass flow hopper on the
throat of the extruder in pounds or kilos per hour, and adjusts the extruder speed to maintain the
desired throughput. The actual throughput is compared to a desired target throughput of the
product entered on the LIW controller. The LIW controller communicates to the XCD-X Extruder
Drive Control, which adjusts the voltage or reference signal to the extruder drive, which will
increase, or decrease to maintain the desired throughput.
A digital potentiometer replaces the existing rotary drive speed control on the extruder drive panel
and communicates with the XCD-X Extruder Drive Control which is mounted in or on the control
cabinet and is connected to the LIW controller.
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