Dr4501, Dr45A1 - One Pen Classic Pen Alignment - Honeywell DR4300 Replacement Instructions Manual

1.3 DR4501, DR45A1 - One Pen Classic Pen Alignment

Mechanical Alignment
CAUTION Align the pen mechanically as shown in Table 2 and then electrically as described in
Table 3. Never attempt to manually force the pen arms from the front, since this will damage
the pen mechanism.
Step
1 Turn off power, open the door, and lift the pen lifter up. Refer to Figure 1.
2 Unclip and remove the purple ink cartridges from pen 1 arm to provide a better
view of tip of arm.
3 Push the No. 1 pen sector gear down so that its uppermost teeth mesh with
teeth on the motor shaft gear. See Figure 1.
4 Slightly loosen the screw holding the No. 1 pen arm to the servo shaft.
5 Replace the No. 1 pen arm, lockwasher, and screw, but leave the screw slightly
loose.
6 Move the No. 1 pen arm so that its right tip aligns with the inside circumference
of the inner most circle in the center of the chart. Tighten screw.
Push sector gear
pen 1 (top pen)
for zero
3/05
Table 2 Procedure for Aligning the Pen Mechanically
Figure 1 Mechanical Alignment of Pen#1
Replacement Kit Instruction 43-DR-33-87
Action
3