Sterlco SF1000 Gravimetric Additive Feeder - Manual (Page 19)

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4.5.4 Process Data parameters in Mode "3"
a) Work in Standard mode 3 (with screws 1-4)
 Enter Mode " 3" Main Screen:
 Press key to enter Time/Speed setting
screen
 Select Screw speed line and enter new screw
speed %
 Press to activate new time value
 Select Screw Feeding time line and enter
new screw feeding time
 Press key to activate new time value
 Press to return to Main screen
b) Work in Micro Mode 3 (with micro screw "0")
 Enter Mode " 3" Main Screen:
 Press
key to enter Rev/Speed setting
screen
 Select Screw cycles line and enter required
number of screw cycles/shot
 Press to activate new time value
 Select Screw speed line and enter new
desired screw speed %
 Press to activate new time value
 Press to return to Main screen
Notes:
1)
First “learning” cycle - The first injection cycle after changing process data (either part
weight or M asterbatch percentage) is designated for measuring the feeding time, “learning”
the new data and calculating the new required screw velocity (motor current) while working in
mode 0 and 2. Therefore, during the first injection cycle after any change of the data, the
controller will display the last value of the speed (before the change) and the screw will rotate
according this value. The current value will resume during the successive cycle, updated to
meet the new data requirements.
When updating the constant filling time parameter (when working in mode 1 or 3), or the
constant speed (in volumetric mode) the parameters value will take effect immediately during
the next cycle, without a learning cycle.
2) When working in Mode 0 and 2 (machine time), the actual feeding time will be always
identical to the machine time, as sensed by the Sensor input, even during the first learning
cycle.
3) If the process parameters and the installed screw type dictate very low current (less than
2.5%), the current value will be limited to 2.5%, and Alarm "Speed Under 2.5%" will be
initiated.
4) Entered values of the process data are memorized during system shut down and
displayed again, when the system is switched on again.