Stratasys uPrint, Service Manual, Page: 295 / 383

6-28
1. Filament Present but Won't
Extrude
- Spin out
- Head Motor Doesn't turn
1. 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.
2. High pull force in filament tubes.
a. Inspect filament tubes and Y block for debris. Remove debris.
3. Inspect for kinked filament tubes. Replace filament tubes.
4. Check for twisted feed tubes in energy chain. If twisted, replace filament
tubes.
5. Inspect model for excessive overfill.
a. Toolpaths should not overlap by more than 50%. If so, reorient and
reprocess STL.
b. If model curl has caused the part to contact the tip, reprocess part with
less dense fill. Re-run tip Z cal if part is separating from supports
6. Check for loose heater block clamp screws.
7. Plugged Liquefier - replace tips.
8. Check idler wheel gap.
9. Check liquefier alignment.
10. Head idler spring is deformed or installed improperly. Replace head idler
spring.
11. Possible head temperature issue
a. Replace head board and TC Amp board.
b. Replace toggle head assembly.
12. Head motor power wires or encoder failure - replace toggle head
13. In case of Z shift:
a. Realign Z guide rods. See “Installing the Z stage” on page 4-155.
b. Replace Z motor and leadscrew.
c. Replace Z assembly.
1. Intermittent LOE
- Head Motor
- Intermittent tip plug
1. Check for loose heater block clamp screws.
2. Make sure the head connectors are seated properly.
3. Check air plenum for: proper hose connection; properly seating; cracks or
damage.
4. Check to make sure head blower fan hose is connected to blower.
5. If extrusion fails on first layer
a. If using a used modeling base, retry with a new one
b. Rerun Z calibration
6. Plugged Liquefier - replace tips.
7. Inspect model for excessive overfill.
a. Toolpaths should not overlap by more than 50%. If so, reorient and
reprocess STL.
b. If model curl has caused the part to contact the tip, reprocess part with
less dense fill. Re-run tip Z cal if part is separating from supports
8. Check idler wheel gap.
9. Check liquefier alignment.
10. Head idler spring is deformed or installed improperly. Replace head idler
spring.
11. Possible head temperature issue
a. Replace head board and TC Amp board.
b. Replace toggle head assembly.
12. Head motor power wires or encoder failure - replace toggle head
13. Blower fan not supplying enough air flow - weak or stalling. Replace fan.
14. Replace umbilical cable
15. Replace controller board
16. In case of Z shift:
a. Realign Z guide rods.
b. Replace Z motor and leadscrew.
c. Replace Z assembly.