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RETRIES: (DATA line 3 and 1, FIRST and FINAL dispense)
When FIRST time dispense, (DATA line 3), does not equal FINAL dispense,
(DATA line 1), one or more retries have occurred. Retries are evidence
of a problem that will also cause percentage errors.
Retries may indicate possible problems; perhaps the hopper ran out of
material, or the flow rate is so erratic that the first dispense was
short for no good reason. Parameters _RT and _RP determine what
shortage error is necessary to force a retry.
FLOW RATE NUMBERS: (DATA line 2)
Check the RATE numbers, (DATA line 2), to determine each dispense
device.
In the example above:
In the component 1 column, 18224 and 976 translates to 1822.4 grams in
4 seconds (244 interrupts = 1 sec). This is 455.6 grams per second,
typical for a regrind flowing through 3" round or 2"x3" dispense
valves.
In the component 2 column, 19993 and 488 indicate 1999.3 grams in 2
seconds, or 999.6 grams per second flow rate. This is a heavy natural
material, not polyethylene. Perhaps lexan or a glass filled material.
In the component 3 column, 12973 and 31232 indicate 1297.3 grams per
31232 interrupts, or 128 seconds, for a flow rate of 9.99 grams per
second. This is a 1 inch auger feeder, from which we would typically
expect about 8 grams per second. More recent auger feeders use faster
motors delivering about 16 grams per second.
In the component 4 column, 10240 and 31232 indicate a flow rate of 8
grams per second EXACTLY. Since it is exact, and since these two
numbers are, in fact, the "default" settings from when the blender was
first installed, we know that "component 4" has never been run on this
blender, or at least not since the last "CLEAR ALL" was performed.
DATA line 3 dispense weight of 0.0 for component 4, and the TOP-OF-PAGE
heading showing component 4 set to 00.0 percent also confirm that
component 4 is not being run.
The following information will help you determine what devices are in
place on a blender.
Device: Approximate grams per second:
1/2 inch augers, micro pulse valves 1/2 to 2
1 inch augers, 60 RPM motors 6 to 10
1 inch augers, 120 RPM motors 12 to 20
100 series valves dispense 250 to 450
3" round and 2x3 inch valves 500 to 900
900 and 1800 series large 3x6 valves 3000 to 5000
3" round and 2x3 valves with flow restrictors 50 to 100
Regrinds are always lower then naturals. Bulk density will also cause
wide variations in flow rates.
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