Ethernet and Gun Mover Configuration
4-32
Part 1056418-07
E 2019 Nordson Corporation
Top of Slot
+E
Scanner Top
0 channel
Approx.
1.25 in.*
Gun 0 Position
* Depends on scanner model
0 channel
Top of Slot
Gun 0 Position
Scanner To
Approx.
1.25 in.*
−E
Positive
Vertical Offset
Negative
Vertical Offset
Figure 4-27 Calculating Vertical Offset for Vertical Scanner Configuration
Setting the Zero Offset Override
See Figure 4-26. The zero offset override is used to zero the scanner input
and tune out electrical noise on the scanner circuit. Electrical noise can
cause the system to detect phantom parts, which can cause erratic
reciprocator or up/down positioner movement when no parts are in the
booth.
Since the setting of the scanner resolution takes care of most error voltage
in the system, this procedure is used in extremely noisy environments.
When the system is powered up the initial values for LBB and FBB should
be zero. Noise or ambient signals will cause LBB and FBB to change to
some value.
If the noise is in excess 344 for a 3/4 in. scanner or 168 for a 3/8 in.
scanner, the LBB and FBB override values can be used to eliminate this
noise. The maximum noise that can be eliminated is about 0.3 volts (999
LBB/FBB). Values less than 344 (3/4 in.) or 168 (3/8 in.) are ignored.
To tune out the phantom signal, enter values in the LBB and FBB fields (Z)
5−20 units larger than what it takes to display 0. For example, if when a
phantom part is detected the LBB value is 125, then enter a value from
130−150 in the LBB field.
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