Avery Dennison ALX 720 Service Manual page 43

Service manual
ALX 720
Troubleshooting stepper motor driver
The normal operation is indicated by the ready LED. Only the green LED is lightning, the red
ones are switched off.
An error condition is indicated that one of the red LED is switched on. The ready signal is
deactivated and the error message "E__9" is shown on the display. Switch off the machine and
wait a few minutes (until no LED is lightning any longer).
Step What is wrong
1a No LED lightning
1b
1c
2a LED over voltage
2b
2c
3a LED
temperature
3b
4a LED short circuit
4b
4c
4d
5 LED both
6 Double dispensed
label
Release 11/2003
What could be the
reason
No supply voltage
Defective
disconnected cable
Nothing found
Wrong main voltage
selection
Transformer fault
Nothing found
over Too much
load
Ambient
temperature too high
Defective
disconnected cable
Wrong connection
Motor defective
Nothing found
High temperature
and short circuit
detection on same
time
Wrong stepper mode Check
Page 43
How to check it
Measure
voltage
or Check
connection
transformer to driver
board
Check
selector
Measure transformer
voltage should be
40V~ up to 55V~
heavy Control rolls, brake
adjustment
Measure temperature
at front
(<60°C)
or Check cable
screw terminal
Check connections
on screw terminal
Check all
above 3a – 4d
setting to 800 steps
Action to
problem
supply See trouble shooting
main supply
cable Fasten
from replace cables
Replace driver board
voltage See trouble shooting
main supply
Change transformer
Replace driver board
Clean rolls, adjust
brake
Install additional
plate cooling
and Fasten
replace cables
Correct cabling
Replace motor
Replace driver board
steps
jumper Correct
position
solve
screws,
screws,
jumper