Sterling AF-XXX specifications Extrusion Applications, Extruder Tracking Control

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4-4 Extrusion Applications

Discussed in this portion of the manual are the finer points of the additive feeder operation, programming the control, and installation notes and examples. If you are unfamiliar with this product or have never performed this type of installation, please read this section of the manual fully before installing the equipment.

Steps that must be completed before the additive feeder will perform properly:

-The proper control signal from the extrusion process -Accurate programming of the control

Extruder Tracking Control

The extruder tracking control option allows the additive feeder’s auger (follower) to turn in a precise ratio to the speed of your extruder screw (master). The speed control on the feeder can be set for any feed ratio from 10% to 200%.

The extruder tracking control detects the speed of the extruder screw and causes the feeder screw to rotate at the desired RPM. In effect, the extruder tracking control acts as an automatic speed control.

The extruder tracking control requires a 5 VDC TTL NPN RPM signal from the extruder. Use an existing RPM signal from the extruder; consult with the extruder’s manufacturer for the signal type and frequency.

You will need to know:

1.The signal voltage

2.The number of pulses per extruder screw revolution

A wide variety of sensors can be supplied by the manufacturer to suit your needs if the extruder control circuit does not provide a suitable signal.

These sensors include:

•Inductive proximity sensors to sense gear teeth.

•Magnetic pickups to sense affixed magnets.

•Optic sensors to sense affixed reflective tape. (Included with extrusion tracking control)

Consult your sales representative for additional information.

Control Relay Connection

To interlock the additive feeder operation to an extruder, remove jumper (J1) from the terminal block in the control enclosure and wire in the control relay signal from the processing machine. Connecting the additive feeder to the control relay simply ensures that when the extrusion process stops so does the additive feeder. (Without this control connection, the auger may continue feeding material for a short time).

Additive Feeders

Chapter 4: Operation

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Contents SF Series Additive Feeders Shipping Information Table of Contents Program Parameter Descriptions How to Use This Manual SafetySafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves Responsibility General ResponsibilityOperator Responsibility RememberAdditive Feeder Safety Tags Maintenance ResponsibilityReporting a Safety Defect Standard Features Mechanical FeaturesFunctional Description Models Covered in This ManualController Features Electrical FeaturesOptions Accessories Safety Devices and InterlocksSafety Device Lock-Outs Safety Circuit StandardsFail Safe Operation Installation Supply System InstallationUncrating the Equipment Rigging and Placing the Additive FeederElectrical Connections Main Power ConnectionControl Relay Connection Setup Procedures Determining the Desired Feed Rate110 100 Procedure Calibration ProcedureEquipment Needed Examples Observed Feed RatesInitial Start-up Pre-Startup ChecksStarting Up the Additive Feeder Shutting Down the Additive FeederTimer Module Used as a Cycle Override Safety TimerOperation Start-upCounter Module Elapsed Time ModuleInjection Molding Applications Injection MoldingControl Relay Connection Field Control ProgrammingJP1 Program Enable Jumper Resetting the Unit to Un-Programmed StateProgramming Step by Step Guide Additive Feeders Operation Injection Mode Application Notes Extrusion Applications Extruder Tracking ControlExtruder Tracking Installation and Setup Extruder Tracking EquationParameter-Selection Mode Running ModeValue Mode Resetting the Unit to Un-Programmed State Extruder Tracking Control Application Notes Input Pulse Signal RequirementsMinimum Input Pulse Rate Maximum Input Pulse Rate Minimum and Maximum Percent SetpointsProgram Parameter Descriptions Defining Program ParametersMode 1 Default to Zero Parameter 19 Power-up Value Parameter 35 Signal Input 2 S2 Input Configuration Parameter 36 Signal Input 2 S2 Setpoint Preventative Maintenance Schedule MaintenancePhotocopy this page for your maintenance records Preventative Maintenance Material Cleanout/ChangeoverCorrective Maintenance Auger Assembly ChangeoverRemoving Auger Assembly Installing Auger AssemblyMotor Brush Replacement Problem Possible cause Corrective action TroubleshootingIntroduction Problem Possible cause Corrective action Additive Feeders Troubleshooting Appendix Technical SpecificationsAnnex B Information Drawings and Diagrams Additive Feeder Specifications and Overall DimensionsTypical Additive Feeder Controllers Spare Parts List Exploded Assembly Drawing Parts ListDetail # Part number Part/assembly description One Component Control Enclosure Parts Identification Safety Tag Information Warranty ReturnsReturned Material Policy Credit ReturnsAdditive Feeder Identification Serial Number Tag Company LogoTechnical Assistance Sterling, Inc Th Street New Berlin, WIWorksheet for Charting Feed Rates