Stratasys uPrint, Service Manual, Page: 294 / 383

uPrint/uPrint SE Service Manual 6-27
51.
H. Loss of Extrusion (LOE)
Use flow chart above to determine type of LOE, then follow the steps below.
1. Filament Missing at Drive
Wheel
- Filament tube disconnected
- Filament pulled back
1. Verify that filament tube is connected at all junctions.
2. High pull force on the material spool.
a. Verify spool lid is inserted properly and not rubbing on carrier.
b. Remove any debris from bottom of carrier.
c. Filament is tangled on spool. Replace spool.
3. High pull force in filament tubes.
a. Inspect filament tubes and Y block for debris. Remove debris.
b. Inspect for kinked filament tubes. Replace filament tubes.
c. Check for twisted feed tubes in energy chain. If twisted, replace filament
tubes.
1. Filament Tail Left at Liquefier
Inlet
- Broken Filament
- Undetected EOF
1. Verify that filament tube is connected at all junctions.
2. High pull force on the material spool.
a. Verify spool lid is inserted properly and not rubbing on carrier.
b. Remove any debris from bottom of carrier.
c. Filament is tangled on spool. Replace spool.
3. High pull force in filament tubes.
a. Inspect filament tubes and Y block for debris. Remove debris.
b. Inspect for kinked filament tubes. Replace filament tubes.
c. Check for twisted feed tubes in energy chain. If twisted, replace filament
tubes.
4. System did not detect end of filament (EOF). Cycle power. If repeats, verify FP
switch functions properly. Replace material bay if defective.
1. Filament Missing at Drive
Wheel
6. Excess Material Inside Head
Remove head cover and inspect
liquefier inlet
Are both filaments
present at drive
wheel?
3. Filament Present but
Won't Extrude
Enter head maintenance and try
to extrude
Did both filaments
extrude?
Is there excess
material inside the
head? Is there a short
piece of filament in
the liquefier inlet?
2. Filament Tail Left at
Liquefier Inlet
No Yes
No Yes
No Yes
No Yes
5. Part Geometry Failure 4. Intermittent LOE
Did model or
support features
fall over?
No Yes