HP Designjet 3D Service Manual page 416

B. Make sure that the Liquefier Alignment Rod is straight. Roll
the Rod along a flat surface to check for bends. Straighten
as necessary.
C. Insert the Liquefier Alignment Rod - small end first - from the
TOP of the right side Toggle Block, past the Drive Wheel, to
just above the Liquefier inlet.
D. Move the Toggle Bar to the full Left position.
E. Visually check (view from the front of the system) the
alignment of the Alignment Rod with the Liquefier inlet tube.
• Liquefier inlet must be aligned with the toggle head pinch point +/-
0.0065". (The pinch point is the same as the centerline of the Alignment
Rod.)
• If the Support Filament Guide interferes with the Alignment Rod, recheck
"Liquefier Alignment" on page 397.
F. Perform a physical check of the alignment by pushing down
on the top of the Alignment Rod so that it enters the inlet of
the Liquefier. Alignment is not correct if additional pressure
is required on the Rod as it enters the inlet - the pressure
required to move the Rod should be consistent throughout
its travel.
4. Verify Left (Support) side alignment:
A. Repeat steps 1-3 above - except reverse the Toggle Bar
positions.
Figure 415: Liquefier alignment check (1 of 2)
.
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