AEC OFC Series - Manual (Page 21)

OFC Series Extrusion Control Units Page 21
4 Operation
4-1 Setup
General Setup and Installation
; Install the OFC unit on the machine throat. Ensure that the unit is mounted
horizontally and is level. Check the installation to ensure that the hopper can
easily be emptied, and that the material supply hopper drop tube is not touching
the weighed colorant hopper. Support or isolate the upper material supply hopper
or blending unit so that it, or the vacuum loading equipment, is not shaking the
weigh hopper so it will not effect the accuracy of the unit.
; Connect the 110 V power to the panel. Ensure that the circuit powering the
control is clean, and does not power other equipment that draws high current
loads that will cause the voltage to fluctuate. Excessive voltage fluctuation can
cause the control to drop out. If this is not possible, install a UPS (uninterrupted
power supply) or Sola Isolation transformer.
; Install the Haul off speed sensing proximity switch on the upper nip roll drive
shaft, provided extruder or haul-off weight per length control or dual control is
selected. This should be done, if possible at the reducer, reading the keyway of
the drive shaft.
; Install the extruder speed sensing proximity switch on the extruder drive motor
shaft, reading the motor shaft keyway, if possible. The proximity switch can be
mounted on the extruder screw; however, it will be less accurate due to less
resolution/revolution.
; Install and wire the remote 5K, 10K or 20K motorized pot to the control panel
terminals, and to the appropriate haul off or extruder speed motor control. An
optional 4-20 ma or 0 to 10 VDC speed control interface is available in lieu of
the motorized pot, if necessary. Consult the factory for additional details.
; Install the appropriate vacuum loading equipment on the virgin supply hopper.
This can be provided at additional charge by AEC or an existing system can be
used. If the OFC unit is to be gravity loaded from an existing upper supply bin or
blender, simply connect a flex hose from the upper discharge to the stub on the
upper loading valve (if ordered with this configuration).