Sterlco SF1000 Gravimetric Additive Feeder - Manual (Page 12)

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4.1.2 MB feeding modes:
There are two alternative MB feeding modes, depending on the wiring of the "sensor" cable
to the IMM (see Chap. 3.3.2):
 Alternative A (Standard): MB is fed only during the filling (backward motion of the
IMM screw) phase
 Alternative B (Optional): MB is fed mainly during the filling (backward motion)
phase; however, a certain quantity of MB will be fed during the injection (forward
motion) phase as well. This option enables better color dispersion.
Notes:
a)
Timing and time duration of each phase is identified by the Sterling SF-1000 controller
by the sensor input (when the relevant dry contacts in the injection machine are in
"Closed" state).
b) The initial feeding rate during the "filling" phase is determined by the controller
according to the entered parameters (part weight and MB percentage) and the
measured filling time, while the feeding rate during the "injection" phase (if selected), is
a constant percentage of the dosing rate during the "filling" phase (can't be controlled
by the operator).
c) Feeding during the "injection" phase, if applied, will be performed in all 4 operation
modes.
d) The start of the "constant time" in modes 1 and 3 is synchronized always with the start
of the "filling signal" (and not with the "injection signal").