HP Designjet 3D Service Manual page 409

5. Make sure that the Drive Wheel Alignment Rod is straight. Roll the Rod
along a flat surface to check for bends. Straighten as necessary.
6. Insert the Drive Wheel Alignment Rod from the bottom of the right side
(model) heater block (before using, check the rod to make sure that it is
straight).
7. Push the Alignment Rod up into the Main Pivot Block.
8. Position the Alignment Rod so that the stepped portion is centered
between the Heater Block and the Pivot Block. See
9. Tighten the Heater Block Clamp screws.
10. Tighten the Heater Block Mount screws.
Figure 407: Drive wheel alignment
Heater Block Clamp
Screws
1 1. With the Drive Wheel set screw loose (make sure that the Drive Wheel is
free to slide axially on the Motor shaft), gently move the Toggle Bar to
the left until the Alignment Rod rests in the groove of the Drive Wheel.
NOTE: Do not force the Toggle Bar to the full left position. Forcing
the Toggle Bar to the full left position may cause the Alignment Rod
to bend.
12. Adjust the Drive Wheel until the Alignment Rod is centered in the groove
of the Drive Wheel.
13. Tighten the Drive Wheel set screw.
14. Verify proper Drive Wheel alignment:
A. Gently move the Toggle Bar to the right, then back to the
left while observing the Drive Wheel and Alignment Pin.
• View the alignment of the Drive Wheel and Alignment Pin from
the right side of the system.
Toggle Bar to
right.Alignment Pin
inserted so 'step' is
visible.
Drive Wheel
set screw
Toggle Bar to left.
Drive Wheel is
positioned so that
Alignment Pin is
centered in Wheel
track.
Heater Block Mount
Screws
Fig. 407
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