Loma IQ2 User Manual page 22

5
About the metal
detector range
Two sizes of reject bins are available with pneumatic reject mechanisms – small and large.
The size of the bin is determined by the conveyor length and the product to be rejected. The
reject bin is fitted with a hood as standard.
Stop-On-Detect reject
The Stop-On-Detect reject causes the conveyor to stop moving and an alarm to sound
indicating that a contaminant has been detected. The maximum volume of the alarm lies in
the range of 110 to 125 decibels (dB) at 1 metre, but the level can be adjusted.
After removal of the contaminated product, the conveyor has to be manually restarted.
Air blast reject
The air blast reject uses a high pressure blast of compressed air to push a contaminated
product off the belt into the reject bin.
Pusher reject
The pusher reject pushes the contaminated product off the belt into the reject bin.
Retracting band reject
The retracting band reject device uses compressed air to activate the carriage retracting
mechanism. The contaminated product falls through the gap in the belt into the reject bin,
which is mounted on the underside of the conveyor.
Other standard equipment
Electrical services box
Electrical supplies to the conveyor are connected inside the electrical services box. The box
is generally mounted at the front of the conveyor frame but can be overhead mounted.
Supplies are connected via the isolator. The internal components may be mounted on a
printed circuit board or on din rails if a PLC version is supplied. The door of the box is fitted
with the isolator handle, 'Stop' and 'Start' buttons and the emergency 'Stop' button.
The isolator is used for isolating the electrical power to the machine. The 'Start' pushbutton
is used to start movement of the conveyor and the 'Stop' pushbutton stops the conveyor.
Emergency stop button (Farnborough manufactured)
Each conveyor is fitted with an emergency 'Stop' button. This is mounted on the door of the
electrical services box and is coloured red. In the event of an emergency occurring, pressing
the button stops the conveyor and exhausts air out of the pneumatic actuator of the reject
device where applicable.
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