Novexx Solutions ALX 92x, Service Manual

Page: 192 / 824

07/15 Rev. 02 SERVICE MANUAL Fault Location
DPM – PEM – ALX 92x
3
Gap detection
See topic section Electronics Gen. 3  , chapter „Sensor test“.
Material transport
Ribbon, ribbon guide
Problem Possible cause Solution
Gap detection not pos-
sible
Photoelectric switch defective
Check with
SERVICE FUNCTION > Sensor test
, if
necessary replace the photoelectric switch
Photoelectric switches set in-
correctly Use SYSTEM PARAMETER > Sens. punch-LS to alter
sensitivity
False photoelectric switch
selected Select "Punched" or "Reflex" using
SYSTEM PARAMETER > Light sens. type
Print position shifted in
or against print direction
Gap position not recognised
consistently due to gap
contour
Correct photoelectric switch zero line using
PRINT PARAMETERS > Punch offset
[Tab. 3] Possible faults caused by the gap detection
Problem Possible cause Solution
No feed function
Stepper motor plug loose Check and if necessary plug in
Stepper motor defective Check and if necessary replace motor
CPU board defective Check and if necessary replace mainboard
Feed button defective Check and if necessary replace display board
Jolted print image Material unwinder blocked Check and if necessary loosen
Material shifts Material guide set incorrectly Check and if necessary set
(ALX 92x) Backing pa-
per rewinder runs conti-
nuously or never runs
Rewinder control needs
adjustment Adjust the rewinder control, see topic section
Electronics Gen. 3

, chapter „Settings“..
(ALX 92x) Backing pa-
per tears off
(ALX 92x) Backing pa-
per rewinder initializes
when closing the hood.
The rewinder dancer position
was changed, while the hood
was opened. Don´t move the rewinder dancer arm, while the
front hood is open.
[Tab. 4] Possible faults caused by material transport
Problem Possible cause Solution
Unfounded ribbon end
message Ribbon unwind mandrel is not
turned Fix core to mandrel (spring plate), shift spring pla-
te if the thread has stripped.
Photoelectric switch defective
Check and if necessary replace (see also parame-
ter
SERVICE FUNCTIONS > Sensor test )
Ribbon is not being rol-
led up
Ribbon core slips through
Fix core to mandrel (spring plate), shift spring pla-
te if the thread has stripped.
Toothed belt defective Check and if necessary replace the belt
[Tab. 5] Possible faults caused by the ribbon guiding