HP Designjet 3D Service Manual page 412

F. If the tension is not correct remove the Idler Wheel Tension
Adjust screw (5/64" Allen), apply LocTite 222 to the screw
threads, and install the screw.
G. Adjust the screw to obtain a light drag on .003 inch feeler
gauge when it is positioned between the Drive Wheel and
the Idler Wheel.
H. Check the tension with the .005 inch feeler gauge as
above.
I. Continue to adjust the screw until the prescribed tension is
obtained.
J. When adjustment is complete, place the Toggle Bar in the
Neutral position, and remove all feeler gauges.
K. Place the Toggle Bar in the full Left position and spin the
Idler Wheel by hand. The Idler Wheel should spin freely
without drag. If drag is present, re-check adjustments.
Figure 41 1: Idler Wheel Adjustment - Right Side
Drive Wheel
rotated so set
screw head is on
the bottom.
3. Check/Adjust the Left (Support) side Idler Wheel clearance:
A. Move the Toggle Bar to the full Right position.
B. Check/Adjust the clearance between the Drive Wheel and
the Idler Wheel - a .003 inch feeler gauge (shim stock)
should have a light drag when placed between the Drive
Wheel and the Idler Wheel.
C. Place the Toggle Bar in the Neutral position.
D. Insert a .005 inch feeler gauge between the Drive Wheel
and the Idler Wheel.
E. Return the Toggle Bar to the full Right position - the .005
inch feeler gauge should be firmly held between the Drive
Wheel and the Idler Wheel.
Right side Idler
Wheel Tension
Adjust screw.
Use .003 inch and
.005 inch feeler
gauges (shim
stock) to check
clearance.
(Figure 412)
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