Stratasys FDM 2000, Manual

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Procedures
® 10MAY01
F2/3/8000-25
Removing an FDM tip from the FDM head
1) Unscrew the tip using the tip wrench.
Avoid direct skin contact with the hot FDM head and tip. Always
wear heat resistant gloves.
Make sure the tips are at the recommended modeling temperature
before removing them. This prevents the threads on the tip from
stripping.
ABS tips have an o-ring placed on top of the tip. (See graphic on next
page.) Make sure the o-ring is removed with the tip.
2) Place the FDM tip in a location where it can cool. Once the FDM tip has
cooled, return the tip to its holder.
Attaching FDM Tips to the FDM Head
Make sure the FDM tip is designated for use with the currently mounted
FDM head and loaded material.
1) Check the tip to make sure it is clean and has no nicks or scratches. Any
residue of material will be melted out in step five.
2) Place a bead of anti-seize lubricant on the threads and distribute evenly
around the tip.
3) Place the o-ring into the groove on top of the tip if necessary. ABS tips
must have the o-ring in place.
Be careful not to strip the tip threads.
Wear heat resistant gloves to avoid direct skin contact with the hot
FDM head and liquefier opening.
4) Partially screw on the FDM tip and allow it to heat up to the liquefier
temperature.
a) Start the FDM tip by screwing it into the liquefier. Do not screw
the tip all the way into the liquefier.
b) Wait for the actual temperature reading on the liquefier tempera-
ture control (Watlow) to reach the set temperature.
5) Tighten the FDM tip very slowly with the tip wrench until it is seated
firmly against the liquefier opening. If the FDM tip has been used before,
some material might come out of the tip.
If no material comes out of a used FDM tip, it might have been
screwed on too quickly. This causes the liquefier to plug. See
page F2000-35 for instructions on how to clean the FDM head.
Usage—Modeling Operations