Maguire Products GRAVIMETRIC AUGER FEEDER MGF-ST, Оригинальное руководство пользователя

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M A G U I R E P R O D U C T S , I N C .
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G R A V I M E T R I C A U G E R F E E D E R
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Prime the MGF Auger / Calibrate
It may be necessary to prime the auger prior to running. Prime will allow the MGF to run without a
signal from the process machine. Run time is automatically limited to ONE minute. After one
minute the display will read “PRIME TIMED OUT”. During the Prime, the MGF automatically
calibrates the flow rate of the material. To Prime, follow these instructions:
Press 4 times to highlight PRIME FUNCTION
Press ENTER Display will show: PRIME ON
A 60-second counter will begin to count down. During this time the
MGF will self-calibrate and display CALIBRATED indicating that it has
learned the flow rate of your specific material and has adjusted the
motor factor accordingly. After CALIBRATED has displayed, the prime
function can be ended by pressing the BACK button, otherwise prime
will continue to run for 60 seconds, then timeout and alarm, displaying
“PRIME TIMED OUT”.
Press BACK To stop the prime function or any key on the keypad to silence the
alarm.
When the MGF settings are adjusted and the MGF is primed
with material, it is ready for operation.
Switch to RUN using the paddle switch on the left side if the
controller, located next to the power switch.
What happens during NORMAL OPERATION
The software uses the information you have entered, lbs/hr (or shot wt) and Let Down Ratio, plus
the motor factor, to determine a correct percentage off-time between steps for the motor to control
speed.
Two 10K load cells detect the loss of weight after each dispense. Based on this feedback,
adjustments are made to the percentage off-time to maintain the correct metering rate.
In the CONTINUOUS mode the percentage off-time, (motor speed) is adjusted to hold the correct
loss in weight of the hopper.
In the CYCLE mode the speed is adjusted to meter the correct amount over the full screw signal
cycle time. A change in process screw signal time will result in an adjustment to motor speed.
Speed adjustment is based on the previous screw return time. If screw return time is SHORTER
then the PREVIOUS time, the auger motor will continue past the end of the run signal for 1
additional second. It will run faster on the next dispense to end in time.