Saika METARIDDER MC Series User manual

User’s Manual
Metal Detector
METARIDDER MC Series
Saika Technological Institute Foundation
MC
-
E (0
1
) / 201
805

Introduction
Thank you for purchasing METARIDDER MC Series (hereinafter referred to as the machine).
Read this manual before and during the operation to use the machine properly.

Symbols used in this manual ·········· 1
Safety Precautions························ 1
Notes on the Operation·················· 2
Warning Labels···························· 3
1 Before Using the Machine
1.1 Detection Principle and Features····· 1-2
1.1.1 Detection Principle ···············1-2
1.1.2 Features·····························1-3
1.2 Names and Functions of Parts ········ 1-4
1.2.1 Names and Functions of
Various Sections of the
Machine·····························1-4
1.2.2 Detection Sensitivity ·············1-6
2 Basic Operations
2.1 Running & Stopping ······················ 2-2
2.1.1 Running ·····························2-2
2.1.2 Stopping·····························2-3
3 Maintenance
3.1 Routine Inspection························ 3-2
3.2 Routine Cleaning·························· 3-3
3.2.1 Routine Cleaning ·················3-3
3.2.2 Points of Cleaning················3-4
3.3 Sensor Sensitivity (threshold) and
Sensor Signal (white noise)
Adjustment”. ································ 3-6
4 Errors and Troubleshooting
4.1 Errors········································· 4-2
4.2 Troubleshooting ··························· 4-2
4.2.1 Troubleshooting···················4-2
4.2.2 Troubleshooting for other
errors·································4-2
5 Specifications
5.1 Specifications······························· 5-2
5.2 Dimensions ································· 5-3
6 Warranty and Customer
Support
6.1 Warranty Information····················· 6-2
6.2 Inquiries & Consultations on the
Product······································· 6-2

1
Metal Detector
METARIDDER
Symbols used in this manual
Following symbols are used in this manual. Please understand the meaning of each symbol in
using the machine.
Indication
Significance
WARNING
Neglect of warnings may result in the death or serious injury of the operator.
CAUTION
Neglect of cautions may result in a minor injury of the operator or a property damage.
Important
Things to be observed and precautions in handling the machine.
Supplementary information and hints.
Part number and other memos.
Safety Precautions
<Warnings>
WARNING
Do not disassemble or modify the machine.
May result in an injury or a machine failure.
Stop the use if a smoke, abnormal smell or noise is detected.
Continued use may cause a fire. Turn OFF the main circuit breaker immediately and
then turn OFF the primary power supply as well. If a power plug is provided, pull out
the plug from the outlet.
Contact SAIKA or the place of purchase for assistance.
Always use the machine at the rated voltage.
Using the machine at an improper voltage may cause a fire or the operator to suffer
an electrical shock.
Be careful in handling the power cable.
Do not pull the cable, put heavy objects on the cable or place heat source near the
cable. Doing so may damage the cable, causing a fire or electric shock to the
operator.
In servicing and/or inspecting the machine, always turn OFF the Operation
Switch and the main circuit breaker.
If a plug is provided, pull out the plug from the power outlet.
Unexpected operation of the machine may cause an injury or electric shock.
Do not touch the power plug with a wet hand. (For a machine with a plug)
The operator is susceptible to an electric shock due to the moisture on the hand.
Do not open the damper door and reach inside with the power ON.
Unexpected operation of the machine may lead to an injury.

2
Metal Detector
METARIDDER
<Cautions>
CAUTION
The machine is assembled with precision. Do not expose it to excessive
vibrations and/or mechanical impacts.
Install the machine on a level floor without a vibration.
Avoid using the machine under a high temperature and humidity.
The operating temperature for the machine is 5Cto 40C. * Dew formation must be
avoided.
With high-temperature type LV1, the operating ambient temperature shall be 5C
to 45C.
If the machine is not going to be used for a prolonged period, always turn OFF
the main circuit breaker and the power supply.
If a plug is provided, pull out the plug from the power outlet.
Notes on the Operation
[1] The machine has been adjusted to detect and remove metal pieces contained in virgin plastic
pellets and pulverized plastic pellets. To use this equipment for any material other than plastic
pellets or for other purposes, consult us.
[2] Install the machine on a level so that the materials subject to inspection will fall freely through the
metal detector unit.
[3] Although sufficient care is taken to make the machine resists vibrations and environmental
conditions, the user may be requested to adjust the sensitivity to a weaker level depending on the
environment to avoid malfunctions due to vibrations and/or noise. If such an adjustment is
required, note that metal detection as described in the specifications may not be possible.
[4] Always clean the machine before changing the materials to be loaded. Materials remaining in the
machine may contaminate the material to be loaded next. (Flushing the machine with water is
strictly prohibited.)
[5] The ceramic materials used for the section coming in contact with pellets within the sensor may
break due to an impact. In cleaning the machine, be extra careful not to apply impacts to the
ceramic material by poking or rubbing it with a metal rod.
[6] Do not disassemble the metal detector since it is enclosed in a metallic housing and assembled
with precision to eliminate effects of noises. Disassembling the metal detector will void the product
warranty and SAIKA may refuse to perform maintenance services thereafter.
[7] Use the machine at the rated voltage. Using it at a voltage other than the rated voltage may result
in a machine failure, damage on the machine or electric shock to the operator.
[8] Supply the power to the machine from a dedicated power supply. Supplying the power from other
devices (such as a molding machine) may cause a malfunction due to the introduction of noises.
[9] The operating temperature of the machine is 5C to 40C and the material temperature is 5C to
40C. (* Dew formation must be avoided.)
With the high-temperature type, the operating ambient temperature shall be 5C to 45C, and the
material temperature shall be 5C to 70C. (* Dew formation must be avoided.)
[10]In installing the machine, ensure to provide a grounding (Class D grounding). Otherwise,
malfunctions may occur.

3
Metal Detector
METARIDDER
Note that SAIKAwill not be held responsible for secondary accidents and/or troubles other than
those caused directly by the machine.
Warning Labels
Rear side of frame, Transformer housing, Optional box
Maintenance door
Maintenance door (with safety switch)
1
2
3
4
4

4
Metal Detector
METARIDDER
Inside the control panel (Main unit)
Inside the control panel (Door)
No.
WARNING
1.4
Pinching fingers
When opening and closing the rear side of
the frame and the maintenance door, use
thorough caution.
2.3.5
Electric shock
Be extra careful not to suffer an electric
shock.
6
Electric shock
Be extra careful not to suffer an electric
shock.
[Table 1: List of warning labels]
5
6

1-1
Metal Detector
METARIDDER
1
Before Using the Machine
1.1 Detection Principle and Features·····················1-2
1.1.1 Detection Principle·······································1-2
1.1.2 Features····················································1-3
1.2 Names and Functions of Parts························1-4
1.2.1 Names and Functions of Various Sections of
the Machine ···············································1-4
1.2.2 Detection Sensitivity·····································1-6

1-2
Metal Detector
METARIDDER
1.1 Detection Principle and Features
1.1.1 Detection Principle
The machine is designed to make a highly accurate metal detection by the adoption of Dielectric
Loss Isolated High Frequency Oscillation method sensor, which was developed by SAIKA.
If a metal piece approaches the magnetic fieldAgenerated by the sensor, an eddy current runs on
the metal surface and the magnetic field B will be generated to cancel the magnetic field A. The
machine detects the disturbance caused by the generation of magnetic field B and determines if it
is caused by a metal from the level of response.
Metal piece
Material
Magnetic field A
generated by the sensor
Sensor coil
Magnetic field B generated
by the approaching metal
piece
(opposite to A)
Internal tube of the sensor
(ceramic)
Sensing area

1-3
Metal Detector
METARIDDER
1.1.2 Features
The machine is capable of detecting and removing metal pieces mixed in the material using a
highly sensitive metal detector.
Four types of sensor calibers (20 mm, 24 mm, 30 mm and 40 mm) are available, which
can be selected according to intended application, by sensitivity, the volume to be treated and
shape of material.
* For the detection capability according to the caliber, refer to Table 8: Machine
Specifications in Section 5-1.
The MC series is designed to be more compact than the conventional PLN series.
With the optional attachment, the MC series becomes compatible with the PLN series.
With the anti-static structure (standard feature), malfunction caused by static electricity of
materials can be reduced.
With the detection history acquisition function (optionally available), date/time of detection can
be saved in a SD card (.CSV). Detection date/time can be checked via the SD card.
All types of metals, including stainless steel, aluminum, brass and copper that cannot be
eliminated by the magnetic detection, can be detected and removed.
* However, iron oxide, of which the property has changed, is excluded.

1-4
Metal Detector
METARIDDER
1.2 Names and Functions of Parts
1.2.1 Names and Functions of Various Sections of the Machine
4
5
7
3
2
1
6
9
10
8
11
12
13
14
15

1-5
Metal Detector
METARIDDER
No.
Name
Function
1
Counter (optional)
Displays a metal piece (foreign object) detection count.
2
Top hopper (optional)
The hopper to load the material.
3
PLC unit (optional)
Detection history data can be stored in a SD card.
4
Buzzer/reset switch
(optional)
At occurrence of an error, the buzzer sounds. This switch is used to turn off the buzzer.
5
Cooling fan (optional)
For cooling inside the sensor housing.
6
Transformer (optional)
Converts the voltage of primary power supply. (For the use of primary power supplies other
than 100 VAC.)
7
Discharge chute
Discharge port for metal pieces.
8
Operation switch
Turns ON/OFF the power supply to the controller
(for operation). * For user operation
9
Louver (optional)
A louver for ventilation. (Available in combination with the cooling fan)
10
Discharge damper
Transfers detected metal pieces and the material (pellets) to the discharge chute.
11
Light tower (optional)
Indicates the status of the machine.
Green: normal operation, Yellow: metal detected, Red: error
12
Adjustment volume and
coaxial connector
This connector is used to connect the sensor output signal and sensor sensitivity (threshold)
adjusting dials and the oscilloscope. For details, refer to “Sensor Sensitivity and Sensor
Signal Adjustment” in Section 3-3.
* For user operation
13
Control board
Used to control the equipment.
14
Circuit protector
Provides a protection against an overcurrent on the solenoid
for operating the discharge damper.
* For user operation
15
Main circuit breaker
Turns ON/OFF the power supply to the machine.
[Table 2: Names of parts]
Internal view
内部
15
12

1-6
Metal Detector
METARIDDER
• Control unit door front view
1.2.2 Detection Sensitivity
In using the machine, note that there is a difference in the sensor signal depending on the path of
the detected metal inside the sensor even if the same metal piece is used.
Center of the sensor
(the distance to the sensor coil is big)
The detection response is the smallest.
(= lowest detection sensitivity)
Near the sensor wall
(the distance to the sensor coil is small)
The detection response is the largest.
(= highest detection sensitivity)
Important
The detection sensitivity of the machine is set by assuming the metal pieces to
pass the center of the sensor.
Center of the sensor
Sensor coil
Near the sensor wall
Sensor
Sensor unit
POWER lamp:
When the power switch is ON, this lamp lights.
LEVEL lamp:
Used for maintenance (gain adjustment)
Internal buzzer:
At occurrence of an error, the buzzer
sounds.
OUT lamp:
At detection of a foreign object, this lamp lights.

2-1
Metal Detector
METARIDDER
2
Basic Operations
2.1 Running & Stopping······································2-2
2.1.1 Running·····················································2-2
2.1.2 Stopping····················································2-3

2-2
Metal Detector
METARIDDER
2.1 Running & Stopping
2.1.1 Running
1. Turn ON the Main circuit breaker.
(See Table 2, No. 15 in Section 1.2.1 Names and Functions of Various Sections of the
Machine.)
2. Press the Operation Switch on the left side of the door.
(See Table 2, No. 8 in Section 1.2.1 Names and Functions of Various Sections of the
Machine.)
3. The Operation Switch lights up in green.
* If the light tower is included in the option, the green indicator lights up.
Important
This machine is stabilized in approx. 60 seconds after the start-up. Supply the
material after elapse of at least 60 seconds.
When the sensor normally detects a metal piece (foreign object), the machine executes the
following operations:
The discharge damper starts its discharging operation.
When a detection is made, the yellow light on the light tower turns ON. (Only for the
machine with this option.)
The detection count value is incremented. (Only for the machine with this option.)
STOP
Running
During stabilization
(approx. 60 sec)
* Metal detection not
possible
Turn ON the circuit breaker
Light tower (optional)
OFF
Green light blinks
Green light ON
Machine state
Press the
Operation
Switch

2-3
Metal Detector
METARIDDER
* The detection count value is a conceptual image.
2.1.2 Stopping
1. Press the Operation Switch while the machine is in operation.
(See Table 2, No. 8 in Section 1.2.1 Names and Functions of Various Sections of the
Machine.)
2. The Operation Switch illumination goes OFF and the machine stops.
Home
Discharge position
Detection count
(Optional)
Light tower
(Optional)
Metal piece detection
Yellow light ON
Green light ON
Green light ON
Discharge damper operation
Home
0
1

3-1
Metal Detector
METARIDDER
3
Maintenance
3.1 Routine Inspection ·······································3-2
3.2 Routine Cleaning ·········································3-3
3.2.1 Routine Cleaning·········································3-3
3.2.2 Points of Cleaning ·······································3-4
3.3 Sensor Sensitivity (threshold) and Sensor Signal
(white noise) Adjustment”.······························3-6

3-2
Metal Detector
METARIDDER
3.1 Routine Inspection
In order to use the machine in the optimum condition, it is recommended to perform routine
inspections before loading and changing the material.
Read this section for determining the points and types of inspection.
Checking the operation of discharge damper
Move the discharge damper in the direction indicated by arrow, to make sure that the damper
returns to the original position.
Make sure that the circuit protector is not activated. (Refer to Section 1.2.1, Table 2 No. 14.)
If the circuit protector is activated,
discharge operation is disabled. (Refer
to Section 4.2.2 Troubleshooting B.)
Normal status When the circuit protector is
activated
Checking operation with a test piece (*1)
To check the detection sensitivity, confirm that a test piece will be discharged to the discharge
chute properly.
If the test piece cannot be discharged properly, contact SAIKA.
(*1): Test pieces are optional.
Important
In order to prevent the test piece being lost in the line or mixed with the
material, provide a protection to the discharge port.
Checking the cooling fan operation
Ensure that air flows out from the cooling fan.
If the cooling fan does not blow air, or if the fan abnormally sounds, it needs replacement.
If cooling fan replacement is required, contact us.

3-3
Metal Detector
METARIDDER
The cooling fan turns ON if the ambient temperature rises above 30C and turns OFF if
the temperature drops to 15C.
It may not be running depending on the ambient temperature.
The cooling fan service life (*1) is approx. 4 years and 6 months (approx. 40,000 hours),
assuming that it runs for 24 hours.
(*1) When the fan is used at 25C. * When the operating ambient temperature is 35C, the service life is reduced to
half.
3.2 Routine Cleaning
3.2.1 Routine Cleaning
Pay attention to the followings in cleaning the machine.
WARNING
Before cleaning, ensure that the Operation Switch and the Main Circuit
Breaker are turned OFF.
CAUTION
Do not wash with water.
CAUTION
The machine is assembled with precision. Do not remove parts that need not
be removed.
Items to be prepared:
Prepare following items before cleaning.
Vacuum cleaner
Dry rag
Air blowing device
CAUTION
In order to prevent foreign matter and dusts on the machine from
contaminating the production line at the time of cleaning, take necessary
measures such as providing a protection.

3-4
Metal Detector
METARIDDER
3.2.2 Points of Cleaning
Clean the area on which the material may be adhered (the area in the yellow dotted line) with a
vacuum cleaner or an air blowing device.
Important
Be careful not to let materials infiltrate the machine while cleaning.
Sensor unit
Lead tube
Cooling fan (Inside of cover)
Maintenance
door
Discharge
damper
Inside the frame
Around the
discharge chute
Air filter (Inside of cover)
Discharge chute (outside)