MAGUIRE MPA-6 Series Owner's manual

MAGUIRE PRODUCTS INC.
Pumps –Series MPA-6
MAGUIRE
Series MPA-6
Six Roller Liquid Color Metering Pump
with Automatic Speed Control
INSTALLATION •OPERATION •MAINTENANCE
Original Instructions Manual
Revision Date: March 26, 2019
Copyright ©Maguire Products, Inc. 2019

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Maguire Products Inc.
Model MPA-6
LIQUID COLOR METERING PUMP
With AUTOMATIC SPEED CONTROL
Table of Contents
Start-up Procedure ___________________________________________5
Principle of Controller Operation _______________________________7
Controller Operation in Conjunction with Regrind Feeder Operation__7
Start-up Procedure ___________________________________________5
Principles of Pump Operation __________________________________9
Pump Tubing_______________________________________________10
Description of Controls ______________________________________11
Formulas for Setting the Counter ______________________________13
Changing Colors____________________________________________15
Disassembly and Cleaning ___________________________________16
Troubleshooting Controller Problems __________________________17
Normal Operation ___________________________________________18
In-House Repairs ___________________________________________21
Troubleshooting Loss of Color ________________________________23
Output Specifications________________________________________24
Three-Tiered Stand Instructions _______________________________25
Warranty __________________________________________________26
Technical Support and Contact Information _____________________27

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Copyright
©2019 Maguire Products Inc.
The information contained within this manual including any translations thereof, is the property of
Maguire Products Inc. and may not be reproduced, or transmitted in any form or by any means
without the express written consent of Maguire Products Inc.
To every person concerned with use and maintenance of the Model MPA-6 Liquid Color Metering
Pump with Automatic Speed Control it is recommended to read thoroughly these operating
instructions. Maguire Products Inc. accepts no responsibility or liability for damage or malfunction of
the equipment arising from non-observance of these operating instructions.
To avoid errors and to ensure trouble-free operation, it is essential that these operating instructions
are read and understood by all personnel who are to use the equipment.
Should you have problems or difficulties with the equipment, please contact Maguire Products Inc. or
your local Maguire distributor.
These operating instructions only apply to the equipment described within this manual.
For the latest revision of this manual, visit www.maguire.com
Manufacturer’s Contact Information
Maguire Products Inc.
11 Crozerville Road
Aston, PA. 19014
Phone: [phone]
Fax: [phone]
Website: http://www.maguire.com
Email: [e-mail]

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START-UP PROCEDURE
1. Place color drum next to process machine.
2. Install pickup lance into liquid container for suction pickup of liquid, or attach
tubing assembly in accordance with color manufacturer's recommendations.
3. There should be provision for attaching the poly-tubing to the process machine
so as to allow color to be metered in directly over the feed section of the
screw, or into a premixer if one is installed. Assuming provisions have been
made, attach or install the poly-tubing to the process machine as required.
(The best color mixing without color contamination of the feed throat of your
machine is obtained when the color delivery tube is positioned approximately
1/2-inch over the screw at the forward edge of the feed throat toward the side
of the screw that is turning downward.)
NOTE: Adaptor Plates are available from MAGUIRE PRODUCTS that mount
between the hopper and feed throat. This will allow easy insertion and removal
of the color delivery tube into the feed throat of the process machine.
4. Connect the power cords as follows:
Plug the "CONTINUOUS POWER" cord into a standard 110 volt continuous
power source. Plug "SIGNAL" cord into outlet that is energized only when the
screw is turning. The signal can be as low as 24 volts, as high as 240 volts,
either AC or DC.
The "screw return" time and associated "SIGNAL ON" time must be at least
one (1) second. If you are not sure that this is always the case, then it is
advisable to select another source of power for the signal. INJECTION time
would be an excellent choice for a signal. For very short overall cycle times,
the CLAMP CLOSE time is usually the longest signal time available. When
screw return times are shorter than 1 second, use the INJECTION circuit or
CLAMP CLOSE circuit to provide power to the SIGNAL cord.
5. Set Counter to 20 and switch pump to 'CONTINUOUS'. Rollers should now be
turning slowly.
Lay the pump tube into the slot across the top of the pump head running front
to back in a straight path across the top of the dowel pin rollers, positioning the
brass tube-inlet fitting against the machined recess of the pump head. Draw
the tube into position under the overhanging portion of the pump body and
maintain tension while the turning of the rollers draws the tube into place.

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The tube, properly installed, will be in contact with only the uppermost two
rollers. The inlet end of the tube will be resting against the small recess that is
machined into the side of the pump head that faces front. The tube will pass
through the pump body in a nearly straight line and reappear out the other
side of the pump head.
6. Assuming pump is not already primed, set counter to 60 and run pump in the
'CONTINUOUS' mode until color line is primed.
7. Using the formula provided in this manual, set the counter to the proper setting
for the particular part you are molding.
8. The main switch should now be set on "CYCLE". Your pump will now cycle on
and off each time the process machine screw is cycled.
Pump speed will automatically adjust to match screw return time.
REMEMBER: Experience may show that a somewhat higher or lower counter
setting is required to produce the exact depth of color desired. Once the
proper setting is determined, it should be recorded for future reference.

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PRINCIPLE OF CONTROLLER OPERATION
The MAGUIRE Digital Controller provides the precise speed regulation and metering control
necessary to assure absolute accuracy over color usage. The Controller signal cord is plugged
into an outlet that is energized only when the process machine screw runs. During each screw
return cycle, the motor runs and color is metered into the throat of the process machine.
Since metering rate is directly related to motor output shaft rotation, accuracy is obtained by
controlling the exact degree of rotation of the drive motor. The unique Maguire Products Digital
Controller is designed to do this with precision. Our standard Model divides each full motor
rotation into 159 increments; each increment representing a small fraction of a gram of color being
carefully measured out.
The digital counter located on the face of the controller provides the means for predetermining the
exact degree of rotation and, therefore, the precise amount of color that will be added during each
cycle. When the pre-set count is reached, the motor will automatically shut off, ensuring that no
excess color is metered. To determine the proper setting for the counter, a simple formula is used
based on percent of color required and total shot weight in grams (or pounds per hour for
extrusion applications).
Motor speed is automatically controlled by the internal microprocessor to allow color metering to
occur uniformly over the entire screw return cycle. The operator need not concern himself with
motor speed adjustment. Changing cycle times or fluctuations in plant voltage are automatically
detected and compensated for and, therefore, will have no effect on metering accuracy.
The controller contains a 1/27 HP D.C. Permanent Magnet motor with variable speed control of
from approximately 50 to 3000 RPMs. In the standard configuration, the motor is close coupled to
a heavy-duty gearbox with a reduction ratio of 53:1. Final output speed of the motor is, therefore,
approximately 1 to 56 RPMs. As the motor turns, a "hall effect" pickup device on the motor sends
3 pulses per revolution to the microprocessor controlling it. The gearbox ratio of 53:1 means that
159 pulses (3x53) are received for every single revolution of the motor output shaft.
The purpose of the thumbwheel switch is to pre-set the exact number of pulses that the motor is
going to run before stopping. The microprocessor in the controller automatically multiplies the
counter setting by a factor of 10. A setting of 16 on the counter will allow the controller to receive
160 pulses or run approximately 1 revolution before stopping. Regardless of how fast or how slow
the motor runs, color metering will stop after 1 turn.
In addition to this precise control of color quantity being metered, the microprocessor also controls
motor speed using the same pulses for digital tachometer feedback. This ensures that motor
speed is precisely regulated regardless of changing torque requirements or variations in plant
voltage.

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CONTROLLER OPERATION IN CONJUNCTION WITH OUR REGRIND FEEDER
All MAGUIRE Color Feeders are designed to work in conjunction with our REGRIND Feeder
which may be purchased separately at some later date if the handling of REGRIND at-the-throat
becomes a concern.
This Regrind Feeder is installed on the process machine at the base of the material hopper just
above the throat. Liquid Color is introduced directly into the regrind flow chamber. The regrind
enters the flow of virgin resin at the same height above the process feed screw as the color feed.
When REGRIND metering starts, COLOR metering is reduced accordingly. For this reason, both
components must enter the material flow near each other.
REGRIND Controllers are equipped with 2 standard grounded 110V outlets in the rear that provide
both a continuous 110V power source and a "signal" power source to operate a color feeder. Your
Maguire Products COLOR Controller, when plugged into these outlets, receives messages from
the REGRIND Controller telling it when to reduce coloring and by what %. In this way, the regrind
that is added is not "colored twice".
Instructions provided with our REGRIND Controllers explain proper operation of both units when
they are working together.

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PRINCIPLE OF PUMP OPERATION
The MAGUIRE six roller peristaltic pumps are designed for years of rugged industrial service with
little or no maintenance. Only the inexpensive pumping tube needs to be replaced from time to
time to keep these units performing like new.
Metering is accomplished by the compression and release of a flexible pumping tube. These
peristaltic pumps are true positive displacement pumps. Unlike other positive displacement pumps
such as piston, gear, diaphragm, and rotary screw pumps, a peristaltic pump has no seals, check
valves or clearances to allow even the slightest internal leakage. Liquid is retained within a flexible
tube at all times and never comes into contact with any surfaces of the pumping mechanism.
There are no check valves used at all.
Where tubing passes through the pump head, rollers alternately close off a portion of the tube and
squeeze the liquid inside the tube forward by rolling over the tube in the forward direction. As the
tube behind the roller springs back to its original round shape, the expanding inside cavity creates
a vacuum that draws liquid into the tube. At least one roller is always in the position of closing off
the tube completely, thereby assuring that no liquid can "leak" backwards.
Pumping is so complete that this type of pump can pump air as effectively as liquid and can
develop a near full vacuum of 30 inches of mercury. These pumps are self-priming and will pass
any entrapped air bubbles in the liquid through the pump without loss of prime.
Six hardened dowel pins retained by a plastic cage are held firmly out against the inside surface of
the pump head housing by a flexible polyurethane center drive roller. A tube compression slot is
machined into the pump head housing and tube compression tolerances will not change over time.
In this design there are no bearings and the dowel pins will not wear out.
The rollers are driven by a variable speed motor and, as they move over the tube, they cause the
liquid inside the tube to be squeezed forward in small uniform increments. The accuracy of these
pumps for metering small amounts of viscous liquids is unmatched.

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PUMP TUBING
The pump tube that is continually compressed by the rotating rollers is the heart of the pump.
Many materials are available for this tube; resiliency and chemical compatibility being the primary
considerations in selection of this material. Virtually all liquid color applications use polyurethane
tubing.
Conditions that affect tube life are resiliency of the tube material selected--urethane being the
best, chemical compatibility, and tubing diameter--smaller diameters having a longer life than
larger diameters.
Three different diameter pump tubes are available for use in the Maguire Six Roller Pump; 1/8",
3/16", and 1/4" I.D. tubes. Theoretical maximum pumping rates of the pump are as follows:
Using 1/8" I.D. pump tube -- 37 CCs/minute @ 56 RPMs.
Using 3/16" I.D. pump tube -- 74 CCs/minute @ 56 RPMs.
Using 1/4" I.D. pump tube -- 123 CCs/minute @ 56 RPMs.
These maximum pumping rates are achievable only for liquids having viscosities similar to, or
lower than, latex paint or easy pouring syrup. Viscosities so high that they do not readily pour can
also be pumped, but at considerably reduced maximum rates.
While the pump is a positive displacement pump and can produce a full vacuum, the liquid flowing
to the pump is pushed only by atmospheric pressure, about 15 PSI. Since high viscosity liquids
flow poorly through small diameter tubes, these two conditions should be observed:
1. Always use as large a diameter supply tube to the inlet side of the pump as is practical and
do not reduce this diameter except upon entering the pump head.
2. Keep the distance to the liquid supply as short as possible.
In selecting tube sizes, keep these factors in mind:
Larger diameter tubes offer higher pumping rates and are generally recommended when coloring
very large parts. They are also better suited for pumping thicker materials.
Smaller diameter tubes always last longer and also pump more accurately for a longer period of
time.
Generally, presses with less than a 500-ton capacity use 1/8" I.D. green tube. Nearly all larger
presses use 3/16" I.D. red tube. Only large extrusion applications use 1/4" I.D. tube.

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DESCRIPTION OF CONTROLS
1. CYCLE-OFF-CONTINUOUS SWITCH
CYCLE: The controller will meter a given quantity of color and will shut off for the remainder
of the cycle. Quantity metered is controlled by the setting of the thumbwheel switch. In this
mode, motor speed is automatically adjusted by the internal microprocessor based on the
time length of the previous cycle and the setting of the counter. A speed is selected that will
allow the feeder to stop approximately 1/2 second before the cycle ends.
OFF: Will prevent the controller from running and will remove power to the computer
controls.
CONTINUOUS: The controller will run continuously as long as 110-volt power is present at
the controller power cord. Speed is controlled by and directly follows the setting of the
thumbwheel switch. Energizing the "cycle" cord has no effect -with one exception; if the
RANGE switch is in the LOW resolution position (turned to the right) the motor will ONLY
run when the SIGNAL cord is energized.
2. MOTOR FORWARD/REVERSE SWITCH
This switch should be in the FORWARD position for all normal operation. Holding the
switch down in the REVERSE position will cause the controller motor to run backwards.
In LIQUID COLOR pumps, this will cause the liquid color in the tubing to be returned to its
source.
3. THUMBWHEEL SWITCHES
In the CYCLE mode, the thumbwheel switch setting controls the amount of color metered
per cycle. In the CONTINUOUS mode, the setting determines the RPMs of the motor
output shaft.
4. MODE SWITCH
The Mode Switch allows several SPECIAL functions. Located in the upper right corner of
the control panel, it can be turned with a small screwdriver.
NORMAL (mid position)
All functions work as described elsewhere. Approximately 1/16 turn of the motor can be
expected for every count on the counter or 63 turns of the motor for the maximum setting of
999. (This relationship may vary with non-standard models).
FRACTIONAL (left position)

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CYCLE MODE:
If very small metered amounts are required and calculated settings are 10 or less, these
settings may not give you the fine resolution of control that you desire. Turning the Range
Switch to the FRACTIONAL position will shift the display left one dig it with a decimal point
appearing between the middle and last digit.
Display format will be (##.#) so that fractional numbers can be set on the counter. A
maximum of about 6 turns will result from the maximum setting of 99.9. Thus, to accomplish
the same output as before, you would use a setting such as 030 instead of 003, resulting in
a display of "03.0" instead of "003".
CONTINUOUS MODE: no effect
CALIBRATION (right position)
CYCLE MODE:
This position will force ONE cycle to run for 100 counts at a speed of about 20 RPMs. The
SIGNAL cord need not be energized. When calculating METERING RATES for each color
you run, this switch will force the controller to run a proper CALIBRATED output. This
output in grams is used in the SETTING formula.
CONTINUOUS MODE:
The motor will ONLY run when the SIGNAL cord is energized. In the other positions,
NORMAL and FRACTIONAL, CONTINUOUS mode will run the motor WITHOUT the
SIGNAL cord being energized.
5. DISPLAY WINDOW
In the CYCLE mode, the window will display a numerical countdown beginning with the
three digit counter setting and proceeding to zero. In the CONTINUOUS mode, the window
will display motor RPMs. Flashing of this display at half second intervals indicates that the
motor is not running at the speed necessary to deliver all the color in the time allotted (See
TROUBLESHOOTING section for more information). The presence of a decimal point in
the display means the range switch is turned to the FRACTIONAL position.
6. SIGNAL LIGHT
The Signal Light indicates power is present at the signal cord; in other words, the process
machine screw is turning.
7. MOTOR LIGHT
The Motor Light indicates the computer processor is outputting a D.C. voltage to the
controller motor; in other words, the motor is turning.

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FORMULAS FOR SETTING THE COUNTER - MPA LIQUID COLOR PUMP
INJECTION MOLDING (Cycle Mode):
1. Determine the WEIGHT of the entire shot IN GRAMS.
2. Determine the LBS. of COLOR per 100 LBS. of natural required, or KILOS of COLOR per
100 KILOS of natural.
3. Determine the METERING RATE for each color in grams/100 counts.
4. Set the digital counter using the following formula:
(Shot wt) x (lbs/100) / (grams/100ct) = Setting
Example: Shot weight = 400 grams
4 lbs color per 100 lbs of product
Metering rate = 52 grams/100ct
400 x 4 / 52 = 30.76 Set Counter on 31
EXTRUSION (Continuous Mode):
1. Determine the extruder output in pounds per hour.
2. Determine the LBS. of COLOR per 100 LBS. of natural required. or KILOS of COLOR per
100 KILOS of natural.
3. Determine the METERING RATE in grams/100 counts.
4. Set the digital counter using the following formula:
(lbs/hr) x (lbs/100) / (grams/100ct) x .71 = Setting
Example: Extruder Output = 900 pounds per hour
lbs/100 required = 5.5
Metering Rate = 42 grams/100ct
900 x 5.5 / 42 x .71 = 83.68 -- Set Counter on 84.
DETERMINING METERING RATE
To insure ACCURACY a METERING RATE must be determined for EACH COLOR.
1. Switch to CYCLE.
2. Turn CALIBRATION knob (upper right corner) to "CALIBRATE". This will force one cycle of
100 counts to be dispensed.
OR: Set counter to 100 and switch from OFF to CYCLE.
Plug in SIGNAL cord to force cycle of 100 counts.
3. Run several cycles and record GRAM WEIGHT metered each cycle.
The average of these weights is the METERING RATE in grams/100ct.
Example: Each CALIBRATION cycle produces 55 grams output.
Your METERING RATE is 55 grams/100ct.

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ALTERNATE FORMULA METHOD
This method does not require calibration, but instead relies on an accurate knowledge of the
weight of the liquid (lbs/gal) and accurate tube sizes.
INJECTION MOLDING (Cycle Mode):
1. Determine the WEIGHT of the entire shot in GRAMS.
2. Determine the PERCENT color let-down desired.
3. Determine the weight of the liquid color in POUNDS per GALLON.
or GRAMS per LITER (G/L).
4. Set the digital counter using the following formula:
(Shot Weight) x (% let-down) x ('C' factor) / (lbs/gal) = Setting
or (Shot Wt) x (% let-down) x ('C' factor) x 120 / (G/L) = Setting
Example: Shot Weight = 400 grams
% color = 1.2%
Weight of liquid color = 12 lbs. per gallon
Green tube; 'C' factor = 1.3
400 x 1.2 x 1.3 / 12 = 52 -- Set Counter on 52
EXTRUSION (Continuous Mode):
1. Determine the extruder output in pounds per hour.
2. Determine the percent color let-down desired.
3. Determine the weight of the liquid color in pounds per gallon.
or GRAMS per LITER (G/L).
4. Set the digital counter using the following formula:
(lbs/hr) x (% let-down) x ('E' factor) / (lbs/gal) = Setting
(lbs/hr) x (% let-down) x ('E' factor) x 120 / (G/L) = Setting
Example: Extruder output = 900 pounds per hour
% color = 2%
Weight of liquid color = 16 lbs. per gallon
Red tube; 'E' factor = .47
900 x 2 x .47 / 16 = 52.875 -- Set Counter on 53
CHART OF 'C' and 'E' FACTORS:
Tube Size
'C' factor
'E' factor
1/8" I.D. (green)
1.3
.93
3/16" I.D. (red)
.66
.47
1/4" I.D. (clear)
.39
.28
NOTE: If you have Model MPA-6-18 (which uses an 18 RPM motor) then multiply these
factors by six, i.e. (6 x C factor).

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CHANGING COLORS
1. Run the pump in REVERSE to empty the tube of color.
2. Remove pump tube from pump head.
3. Remove poly-tubing from process machine and coil entire tube onto top of drum. Do not
disconnect any other fittings. Tape up the open end of the poly-tubing to prevent dripping of
color.
4. Bring in next color drum and repeat Steps 5 through 8 of "Start Up Procedure".
PICKUP ASSEMBLY
An inexpensive pickup assembly is fitted to the drum of color to be used. If one pump is going to
run more than one color, each color drum should be equipped with its own pickup assembly. Each
pickup assembly consists of several components. All are connected together and should never be
disassembled except in the case of a tube blockage caused by contaminants in the liquid color.
The lance and threaded adaptor are installed directly into the lid of the drum. The other end of the
tubing assembly is connected to the feed throat of the process machine.
A common source of problems comes from contaminants, such as plastic pellets entering the
liquid. When opening a new drum or replacing an empty one, be certain that no openings are left
uncovered where contaminants could accidentally enter the liquid.
Tubing assemblies for 30 and 55 gallon drums are fitted with a High Capacity Filter that reduces
the possibility of plastic pellets clogging the pump tube. It is easily cleaned by back flushing with
water.
If a pickup assembly is available for every color, operators should never need to come in contact
with the liquid color except when replacing an empty drum. The REVERSE switch allows the
operator to momentarily run the pump in reverse to drain liquid from the tube assembly back into
the liquid container. Since there is no cleanup required for a color change and no color is
discarded or lost, a considerable amount of coloring is saved over a period of time.

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DISASSEMBLY AND CLEANING
CLEANING THE PICK-UP ASSEMBLY
If a pickup tube assembly must be used for a different color or if,
for some other reason, it becomes necessary to clean the coloring from
the inside of a pickup assembly, the following steps will make this
potentially messy job easier.
1. Disconnect tubing from the process machine.
2. With the pump tube still installed in the pump head, run the pump in reverse until no more
color flows from the tubing assembly.
3. Once this is done and you are assured of a continuous air passage through the tubing, the
tubing assembly should be removed from the pump head and color container and placed
in a large utility sink. Place one end of the tubing assembly into the spigot opening and
turn on the hot water SLOWLY. Once you can see water flowing from the other end of the
tubing assembly, leave the water running for about 10 minutes. This should be sufficient
time to clean all remaining traces of liquid color from the tube. BE PATIENT. HOT WATER
AND TIME WILL DO THE JOB FOR YOU.
4. A copper pickup lance can be cleaned in the same manner.
SIX (6) ROLLER PUMP HEAD
1. Remove the clear cover disk.
2. Using an Allen wrench, remove the two recessed screws holding the pump head to the
control housing. The pump head may now be removed by simply pulling it away from the
motor shaft.
3. To remove the roller set, simply push it out of the outer pump head housing.
4. Once disassembled, clean all parts if necessary with soap and water. Reassemble and re-
install in reverse order.
NOTE: DO NOT LUBRICATE ANY PUMP HEAD PARTS. The pump works best when
totally DRY with NO lubrication. Since the center drive roller relies on friction to drive the 6
tube compression rollers, any lubrication such as Liquid Color contamination will interfere
with proper operation.

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TROUBLESHOOTING CONTROLLER PROBLEMS
IF YOUR MAGUIRE PRODUCTS CONTROLLER DOES NOT WORK PROPERLY:
1. READ below about NORMAL OPERATION and compare to your problem.
2. The QUESTIONS that follow may assist you in solving your problem.
3. If you are unable to remedy the problem:
a. ANSWER in writing as many of the QUESTIONS that apply.
b. DESCRIBE the PROBLEM in your own words as carefully as you can.
c. RETURN this information with the unit for repair.

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NORMAL OPERATION
With MAIN POWER cord plugged in, NO power to the SIGNAL cord, Switch on CYCLE:
The display should read zero ( 0)
The motor light and signal lights are OFF
The motor is NOT running.
IN CYCLE:
Nothing will run until the SIGNAL cord gets power. The first time the signal cord gets power,
the unit will start running at about 10 RPMs and will count down from whatever number is
set on the counter.
When the count reaches zero ( 0), the motor will stop.
On all successive cycles, the motor will run at whatever speed is required to finish counting
in the time period of the PREVIOUS cycle. If a cycle is SHORTER than the PREVIOUS
cycle, the motor will stop before it has counted down to zero ( 0). The lowest number
reached during the countdown will be displayed.
AT NO TIME will the display be COMPLETELY BLANK.
If you try to simulate machine cycles by turning the CYCLE switch on and off, the controller
will consider every cycle as a FIRST cycle and will always run at 10 RPMs.
To simulate machine cycles, plug the signal cord in and out of a wall outlet. Shortening of
the 'on time' will result in the motor running faster. Lengthening of the 'on time' will result in
a slow down of the motor speed.
BLINKING of the display is a WARNING that the actual motor speed is not up to "target"
speed.
If the motor FORWARD - REVERSE switch is switched to OFF, the motor will stop and the
display will hold at whatever number it reached in its countdown.
Switching to OFF and then to FORWARD again during a countdown will cause a
momentary increase in motor speed as the unit tries to 'catch up'.
CYCLE TIME:
The motor will start to run about 1/3 (.3) second after a signal is received.
If the Signal is less than about 2/3 (.6) seconds long, then the motor will stop and the
processor will not consider this as a valid cycle. No recalculation of motor speed will occur.
If the signal is over 2/3 (.6) seconds long, then the motor will run for at least 2 seconds
even if the signal goes away. This allows time for speed adjustments to occur.
On longer cycles, over 2 seconds, the counter should count down to zero and the motor
should stop within the 1/2 second before the end of the signal.

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If you are simulating cycles by plugging and unplugging the signal cord, it will be difficult to
produce uniform motor speed and count down rates unless you carefully use a watch to
produce uniform cycle times.
If power to the signal cord ends before countdown is complete, the motor stops immediately
and the number of counts remaining is held on the display.
IN CONTINUOUS:
The signal cord has no effect. The motor runs at a speed equal to the counter setting. If the
setting is above the maximum speed possible, then the motor just runs at full speed and the
display BLINKS.
Full speed will display about '65' for 2 magnet models (most 3 and 6
roller pumps) and about '90' for all other models (Extrusion Following
models display about 180 at full speed).
BLINKING of the display is NOT NORMAL except during speed changes.
If the FORWARD - REVERSE switch is turned OFF, a display of one [1] will result and the
motor will not run.
ALL UNITS:
If, at any time, the processor becomes confused and fails to run the motor properly or
display the proper numbers, the unit will 'restart' itself after a delay of about 4 seconds.
BLINKING of the display means that actual motor speed is not up to "target" speed. This
occurs normally when the motor is "ramping up" to speed or when you set too high a
number on the counter, resulting in a demand for a speed that the motor cannot achieve.

M A G U I R E P R O D U C T S , I N C.
20
S e r i e s M P A 
ANSWER QUESTIONS as they apply
YOUR COMPANY NAME:_______________________________ DATE:_______________
NAME of PERSON who saw or knows the problem:__________________________
CONTROLLER SERIAL NUMBER: ____________
Time in service: (new, 1 hour, 1 week, years, etc.) ____________
IF PROBLEM IS WITH OUTPUT
SPECIFICATIONS as they apply:
Injection molding, Shot weight: ____________
Extrusion, lbs/hour: ____________
Liquid color lbs/gal: ____________
Desired output (%): ____________
Viscosity of liquid color (thin, thick, etc.): ____________
Supply and delivery tube sizes and lengths,
if not standard: ____________
IF PROBLEM IS ELECTRONIC FAILURE
CIRCUMSTANCES of failure:
During storm: ____________
On Monday morning start up: ____________
Same time as another malfunction in plant such as
a fuse blowing on a nearby piece of equipment: ____________
Possibility of incorrect voltage (220): ____________
Possibility of low voltage condition (below 100): ____________
On power-up: ____________
OR after running for how many hours: ____________
Is problem intermittent: ____________
How often: ____________
TESTING results:
Do other controllers fail under same circumstances: ____________
Does controller work when tested in another location: ____________
Does problem come and go: ____________
After how much time: ____________
IF PROBLEM IS ERRATIC OR INCORRECT OPERATION
If running in CYCLE:
What is the COUNTER SETTING: ____________
SCREW RETURN (signal) TIME in seconds: ____________
Are screw return times consistent from cycle to cycle: ____________
If not, list some consecutive screw return times:
________________________________________________
Is the problem only at certain settings: ____________
Does display start at the full counter setting
at the start of each cycle (it should): ____________
Does the display BLINK during count down: ____________
Does it reach zero ( 0) before end of cycle: ____________
How long before: ____________
Does display ever go completely blank (it shouldn't): ____________
(it should always show a number or a zero except when blinking)