MAGUIRE WEIGH SCALE BLENDER Installation Operation & Maintenance page 70

B L E N D E R 
W E I G H S C A L E
is added, 20 percent of this amount will be added to the Natural amounts before a color
calculation is made.
Regrind dispense = 600 grams, Natural portions = 1400 grams.
At 4 percent, if ROC=00000, Color would be 56 grams.
If ROC=01020; increase Natural by 20 % of 600, (120 grams).
Color is now 4 % of 1520 grams (1400+120), or 61 grams.
In some cases, the addition of pre-colored regrind tends to produce overall better coloring
because of an initial more uniform dispersion of pigment. In this case you may want to add
LESS color to the Natural portions when Regrind is present. Placing a 1 in the first digit of
the ROC parameter (ROC 10000), will cause a portion of this Regrind component to be
SUBTRACTED from the Natural portions, instead of added.
EXAMPLE: ROC set to (ROC 11020).
The first 1 means subtract. The second 1 selects component 1.
This means take 20 % of component 1, a Regrind, and reduce the NATURAL portions by
this amount. Whatever amount of component 1 is added, 20 percent of this amount will be
subtracted from the Natural amounts before a color calculation is made.
Component 1 dispense = 600 grams, Natural portions = 1400 grams.
At 4 percent, if ROC=00000, Color would be 56 grams.
If ROC=11020; reduce Naturals by 20 % of 600, (120 grams).
Color is now 4 % of 1280 grams (1400-120), or 51 grams.
ROV is a parameter that will allow your unit to AUTOMATICALLY change to a higher
ROV
REGRIND USAGE in the event that the amount of regrind being produced exceeds the
usage rate.
NO LEVEL SENSORS are required for this parameter to work.
The first two digits of the parameter number represent a CYCLE COUNT, the last three
digits represent a PERCENT. When EITHER number equals zero, the parameter has no
effect.
If your system dispenses the full requested amount of regrind for the number of
consecutive cycles specified by the CYCLE count, it automatically jumps to the
PERCENTAGE indicated by the last 3 digits.
This parameter is useful if your process is one where a runner is molded, ground up, and
loaded back into the regrind hopper immediately and continuously every cycle.
For example: Say your runner represents 20 percent of your shot weight. You set your
controller to 25 percent regrind. Under normal conditions your system adds back the 20
percent of scrap that is produced each cycle, only occasionally dispensing up to the
maximum 25 percent that the setting calls for. Since supply is limited to 20 percent, you
never dispense a full 25 percent more then once or twice in a row.
Now say you start producing all bad parts and the entire shot is being feed into the grinder
as scrap. Dispenses will now be a full 25 percent every cycle. The regrind hopper will also
begin to fill.
With this parameter set to (ROV 10100) (10 cycles and increase setting by 100 percent),
after 10 cycles have occurred at the full 25 percent, the unit will automatically start using
regrind at 50 percent.
M A G U I R E P R O D U C T S , I N C .
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