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19
Original Instructions 2015
Care and Maintenance
CLEANING THE NOZZLE
Use extreme caution when maintaining or operating
heated machinery. The nozzle must be heated to 180º C
(minimum) when cleaning.
When to clean the nozzle:
• When filament is not flowing smoothly
• When filament is not being extruded appropriately
• When changing material type
• Periodically between large prints—preventative
maintenance
How to clean the nozzle:
• Canola oil treatment:
– Dip ¾" of filament into oil and shake off excess
– Heat nozzle to 250-260º C
– Push filament through the extruder and nozzle
by hand
– Extrude 200 mm of filament
– Repeat 3-4 times
CHANGING THE NOZZLE
1. To replace the nozzle on the extruder head, first
send the extruder to the home location.
2. Once the extruder is at the home position, raise
the z axis by 220 mm. This will give room to work
under the extruder head.
3. Set the extruder nozzle temperature to 200º C. This
will melt any plastic inside the extruder and loosen
the nozzle.
4. Once the temperature has reached 200º C,
use a crescent wrench and 7 mm wrench to
remove the nozzle. Use the crescent wrench to hold
the base steady. Use caution—nozzle is hot!
5. Once nozzle is removed select the replacement
nozzle. Nozzle size can be determined by
inspecting the machined dots along the side of the
nozzle. Refer to the table below for sizes.
6. Once new nozzle has been selected, hand thread it
into the extruder.
7. Then use the wrench and crescent wrench to tighten
the nozzle into the assembly, only tighten until snug.
DO NOT OVER TIGHTEN.
8. Once nozzle is tightened, set the extruder
temperature from 200º C⁰ to 280º C. This will heat
up the nozzle and ensure it has a tight fit. Make sure
the extruder fan is turned off or the extruder will not
reach the desired temperature.
9. Once the temperature has reached 280º C, use the
wrench and crescent wrench to tighten the nozzle so
it is snug.
Tools Required
• 7 mm Wrench or Socket Wrench
• Crescent Wrench
Do not touch heated nozzle.
Safety Guidelines
• Wear heat resistant gloves
• Prior to all routine maintenance on the extruder
and/or nozzle, insert 6 inch tall block under
actuator to avoid any type of crush hazard
• Use appropriate tools for all cleaning
and maintenance.
NOZZLE SIZE
ID DOTS
0.25 mm
0
0.30 mm
1
0.35 mm
2
0.40 mm
3
0.60 mm
4
0.80 mm
5
