Loma IQ3X Operating Instructions Manual page 47

47
3. Note the (Rx) distance recorded on the detector serial plate located behind the detector
control panel cover.
4. Put the values into the formula - PEC length = L + (0.5 x D) + Rx.
5. Enter the value as required.
EC block packs
If the Product Registration Photo-eye is blocked for the selected number of packs, the detector
will identify this as a fault. Any number of packs may be entered but the default value is 6.
Speed mode
There are three options available for selection as follows:
Fixed
l
Select this option if you are using a fixed speed conveyor system. When selected, both reject
delay and dwell timing must be set in the Rejects Setup screen.
Variable
l
Select this option if you are using a conveyor system where the speed is variable or can be
stopped from an external control source. When in use the conveyor drive will have a shaft
encoder fitted that provides timing pulses to the detector electronics whilst the conveyor is
running. A CTB constant entry field and an option to log speed problems will be visible. When
selected both reject delay in distance and dwell timing in time or distance must be set in the
Rejects Setup screen.
Freerun
l
Select this option when there is no transport system in use, other than the effects of gravity. When
selected, the reject dwell timing must be set in the Rejects Setup screen. A DSP enable option
will be visible.
Tap the arrow to the right of the field to display the drop down list of available speed mode
options and select the one to be used.
Belt speed
This field is displayed if the Fixed speed mode option has been selected. It is important for the
correct operation of the overall system that this entry reflects the actual conveyor speed. The
value can be in metres per minute or feet per minute depending upon the Units option selected
in the Menus > Service > Configuration > General menu.
CTB constant
This field is displayed when the Variable Speed mode option is selected.
The value entered is derived from the relationship between the shaft encoder and
circumference of the roller to which it is fitted.
This parameter is the number of pulses (ticks) per metre/foot of belt travel. To calculate this
figure for entry into the CTB constant field, use either the following metric or imperial formula:
Metric systems
l
CTB = Encoder pulses per revolution x 100 x π x d
Where: d = the diameter of the roller to which the encoder is fitted in millimetres.
Original Document
Operating Instructions
Copyright © Loma Systems