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STACKER 500KS USER GUIDE 23
Step 4. Remove the nozzle.
To loosen the nozzle from the heat sink, use the supplied nozzle
wrench. Once the nozzle is loose, you can turn it with your fingers to remove it the rest of the way. If
the filament guide tube is still connected to the nozzle (Steps 2a, 2b), no worries. Just let the tube
rotate along with the nozzle as you unscrew it with the wrench. If the tube cannot rotate, you may
need to loosen or remove the zip ties that connect the tube to the hot end wire assembly. Once the
nozzle is removed from the hot end, twist and turn the guide tube until it can be removed from the
nozzle.
SPECIAL NOTE ON FILAMENT GUIDE TUBES.
After many hours of use the filament guide tube
may degrade and get stuck inside the nozzle. If the tube becomes stuck, use a pliers to remove it,
and then trim the damaged portion of the tube above the point where you gripped it with the pliers.
You can usually trim the end of the tube once or twice before the tube becomes too short for use.
Also, we recommend trimming the end of your tube with a sharp knife to ensure the end of the tube
properly seals within the nozzles. Make absolutely sure your trim cut is perfectly square. When in
doubt, purchase a new Filament Guide Tube (p/n 90101) from STACKER.
B. Install Nozzles
Step 1.
Hand screw the nozzle all the way into the heat sink by hand until it is fully seated.
Then, reverse (loosen) the nozzle ONE AND SEVENEIGHTHS REVOLUTIONS. This is very
important as this will tighten the filament guide tube into the nozzle in the next step, and also
eliminates the “play” in the fitting on top of the heat sink.
Step 2.
Insert the guide tube.
Be sure the end of the filament guide tube is cut square and in new
condition. If not, recut the tube with a sharp knife so that it is square. Install the filament guide tube
by pushing it all the way into the hot end until it seats deep into the nozzle. Make sure the tube has
been pushed all the way down into the nozzle! If the guide tube is not seated within the nozzle,
problems can occur with filament extrusion.