Nordson Encore HD iControl 2, Installation, Troubleshooting, Repair

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© 2022 Nordson Corporation
1609758-04
4-21 Troubleshooting
Problem Possible Cause Corrective Action
Auto mode is selected,
in/out positioner stays at
the reverse limit
position
Refer to Problem “Auto mode is selected, homing has completed, but no auto positioning
response from in/out positioner.“
Park/Clean and Retract
position values set too
high.
Set the Park/Clean and Retract position values to less than
reverse limit switch position value. If the values are greater, the
in/out positioner will stop at the reverse limit switch and generate
a fault condition during normal operation.
NOTE: If the in/out positioner is an analog version, then the
Reverse Limit value must equal the position at the reverse limit
switch.
In/Out Positioner “jumps”
back to a stop after
moving to a new position
In/Out Positioner
Hysteresis value too
small.
Open In/Out Positioner Configuration screen and increase the
Hysteresis value.
The hysteresis value is the allowable over- or under-shoot
distance from the target position. If the in/out positioner is within
this distance of the desired position when it stops, the iControl 2
system will not move it again to the target position. If the value is
not large enough, the in/out positioner will over- or under-shoot its
destination and then “jump” back to it (called hunting).
A typical setting is 0.5 − 0.7 inches depending on the in/out
positioner speed setting.
In/Out Positioner actual
travel distance does not
match value shown on
iControl 2 screens
In/Out Positioner
position calibration
not completed, or in/
out positioner forward
or reverse limit switch
moved since last position
calibration.
In/Out Positioner calibration involves moving the in/out positioner
to a stop at the forward limit switch and then within 60 seconds
moving it to the reverse limit switch. This sets zero at the forward
limit switch and a reverse limit reference at the reverse limit
switch.
Calibration is performed during in/out positioner configuration, but
can be performed at any time while in Manual mode.
If the physical position of either limit switch has been changed,
then positioning will be incorrect. You must recalibrate the in/out
positioner if you move the limit switches.
NOTE:
The first time Auto mode is selected after in/out positioner
power up, the in/out positioner moves to the reverse limit switch
(home) and acquires a reverse reference value. This value is
used to reset the in/out positioner position for Auto operations.
Continued...