MakerBot Replicator 2X User Manual page 84

DIAGNOSING PRINT QUALITY ISSUES
holding the drive block to the extruder
motor. Remove the drive block and set
it aside. Be careful with the drive block
– if any of the pieces are detached, you
might have a difficult time putting it
back together.
2. Ensure that the drive gear is in the
correct position on the motor shaft.
The top of the drive gear should be
about 2 mm from the end of the
motor shaft. Locate the set screw that
secures the gear to the motor shaft
and make sure it touches the flat side
of the motor shaft.
3. Use the 1.5 mm hex wrench from the
accessory box to tighten the set screw
against the motor shaft.
4. Return the drive block to the motor.
Orient it so that the extruder lever
arm points in the same direction as
the white connector on the motor.
Secure the drive block using the 2 mm
hex wrench and the two bolts you
removed earlier.
84 TROUBLESHOOTING
CONTINUED
5. Return the extruder motor assembly to
the extruder carriage.
6. Reconnect the motor wire harness to
the top of the extruder motor.
7. As one piece, return the fan guard,
the fan, the heat sink, and the spacers
to the extruder. Use the 2.5 mm hex
wrench to tighten the two bolts at the
lower corners of the fan guard.