Nordson Encore HD iControl System, Hardware Manual

Page: 68 / 93

Troubleshooting
4-28
Part 1603054-02
E 2015 Nordson Corporation
Correction Cause Problem
Reciprocator travel
position does not match
the value shown on the
reciprocator control
panel or configuration
screen.
Reciprocator not homed. Touch the Home button and wait for the
homing sequence to finish, then check the
position accuracy. The displayed position will
not be correct until the reciprocator is homed.
Incorrect reciprocator
encoder value entered.
The accuracy of the displayed position versus
the actual position of the reciprocator is
determined by the configured encoder
resolution. Check the encoder resolution
value.
Drive sprocket slipping. Make sure the drive sprocket is securely
connected to the gear reducer output shaft.
Reciprocator does not
move in response to
move command.
Refer to condition “No movement from reciprocator in response to move
command.”
Mechanical failure, drive belt
or chain not engaging drive
sprocket, or drive sprocket
slipping.
The position value changes but the
reciprocator does not move. This can occur
because the encoder is connected directly to
the gear reducer output shaft. Check the
drive belt or chain and sprocket.
Incorrect reciprocator VFD
parameters.
VFD parameters must be set to specified
values in order to respond correctly to signals
from reciprocator controller. Contact Nordson
technical support.
No reciprocator
response when Auto
mode selected.
Refer to condition “No reciprocator response when Auto mode selected.”
Auto cycle delay in progress A 5 second delay occurs when Auto mode is
selected. During the delay a warning beeper
should sound.
An end-of-travel limit switch
is engaged.
Check the iControl Alarm log. Identify the
fault and review the fault troubleshooting
information.
Invalid reciprocator stroke
settings.
VFD parameters must be set to accept
commands from the reciprocator controller.
Contact Nordson technical support.
Unwanted movement
as Reciprocator “hunts”
for the target position.
Reciprocator Hysteresis
value too small.
Open the Reciprocator Configuration screen
and increase the Hysteresis value.
The hysteresis value is the allowable over- or
under-shoot distance from the target position.
If the reciprocator is within this distance of the
desired position when it stops, the iControl
system will not attempt to move again to the
target position. If the value is not large
enough, the reciprocator will “hunt” for its
destination.
A typical setting is 0.5
− 0.7 inches depending
on the reciprocator speed setting.
Obsolete