Specifications

Knife Adjustment
After performing the ink wipeoff test and determining that adjustment to the
adjustable fixed knife is required, follow these steps to perform the knife
adjustment.
6. Refer to Figure 4-12 and locate the two small set screws in the bottom of the
needle plate bracket directly under the under thread presser.
These two set screws together with the larger socket head cap screw that secures
the adjustable fixed knife and under thread presser at the top of the needle
plate bracket (see Figure 4-5) provide for the knife adjustment.
7. Refer to the ’Ink Wipeoff Test’ and determine what direction the adjustable fixed
knife is tilted.
8a. If the ink wipeoff test indicates the adjustable fixed knife is tilted left, slightly
loosen the top socket head cap screw, then tighten the left under side set screw.
8b. If the ink wipeoff test indicates the adjustable fixed knife is tilted right, slightly
loosen the top socket head cap screw, then tighten the right under side set
screw.
9. After either of the adjustments in step 8, perform the ink wipeoff test again to
check the position of the adjustable fixed knife.
10. Repeat the previous steps until the ink wipeoff test shows equal ink removal on
both sides of the movable knife and the force to move the movable knife is
1/2
+
/- 1/4 lbs (200g
+
/- 100g) of pull.
Movable
Knife
Adjustable
Fixed Knife
set screws
Adjustable
Fixed Knife
Needle Plate
Bracket
Under
Thread
Presser
Movable Knife
Drive Arm External
Retaining Ring
Figure 4 - 12 Underside View of Trimmer Parts
Adjustable Fixed Knife Adjustment 4 - 17
110291-01, Rev D 4. Trimmer Maintenance