Loma IQ3, User Manual

Page: 51 / 144

Installation
In order for the reject timing to work correctly, it must be supplied with information about how far the
contaminant has travelled between the head and point of reject. This is achieved via a shaft encoder
which supplies pulses to the CTB input of the micro control board.
The delay information, which is entered in the Product setup menu, then counts the CTB pulses out
to time the contaminated product to the reject point. For this reason the delay is measured in
distance, and should be set at the fastest conveyor speed in order for the reject device to actuate in
time.
The dwell, on the other hand, should be set at the slowest belt speed to guarantee accurate rejection
at all speeds. The dwell can be in units of time or distance depending upon the type of reject device.
Installing a Metal Detector System
This chapter provides generic information covering the installation of a Loma Metal Detector System
in a logical sequence. The system includes a detector head fitted to a European conveyor belt.
The following sub-sections provide more information:
■
Warnings
A list of applicable safety warnings to be observed when installing the metal detector system
is provided.
■
Receiving and Unpacking
Some basic checks should be carried out on receipt of the system to ensure that it has not
been damaged in transit.
■
Moving the Machine
Depending on the size and weight of the system, either a crane or a fork-lift truck will be
required to lift and move it into the final location. This section provides some guidance for
moving the system safely.
■
Adjusting / Levelling the Conveyor
For systems supplied that incorporate a conveyor the operating height may need to be
adjusted so that it can be integrated into your production line. This section provides some
guidance for levelling the system.
■
Clearance Requirements
From safety and operational viewpoints, it is important that sufficient free space is left around
the system, This section provides some guidance.
■
Connecting the Air Supply
Except where a metal detector head only has been supplied, all Loma inspection systems
require a clean and dry compressed air supply where optional automatic reject devices are
fitted. This section provides some guidance on connecting the air supply.
■
Connecting the Electrical Supplies
The system should have its own dedicated electrical supply, unless the line supply is known
to be clean. The earth should be robust, of low impedance and noise free. This section
provides some guidance on connecting an electrical supply.
■
Checking Guards
The system should have its own dedicated electrical supply, unless the line supply is known
to be clean. The earth should be robust, of low impedance and noise free. This section
provides some guidance on connecting an electrical supply.
■
Checking Belt Tracking
The system should have its own dedicated electrical supply, unless the line supply is known
to be clean. The earth should be robust, of low impedance and noise free. This section
provides some guidance on connecting an electrical supply.
41