Feed Dog Height - Brother T-8422C Instruction Manual

13. STANDARD ADJUSTMENT

13-10. Feed dog height

73
Lower
Higher
T-8421C, 8422C, 8452C, 8722C, 8752C
Turn the machine pulley forward until the feed dog (1) is at its
highest position, and then adjust so that the feed dog
(1)protrudes 0.9–1.1 mm from the top of the needle plate (2).
3064M
1. Tilt back the machine head.
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2. Loosen the screw (3) just enough so that the feed bar (4)
can slide.
3. Turn the height adjustment screw (5) as shown in the
illustration to adjust the height of the feed dog (1).
4. Securely tighten the screw (3).
5. Recheck the height of the feed dog (1).
NOTE:
If the feed dog is too high
• The feed dog may touch the needle plate.
• The stitch length may become longer than the stitch
length dial setting.
• Thread tightening may be poor when using thick threads.
• It may be difficult to obtain uniform stitch lengths for
normal feed and reverse feed.
• Lower thread trimming errors may occur (models with
thread trimmer).
If the feed dog is too low
• The stitch length may become shorter than the stitch
length dial setting.
• It may be difficult to obtain uniform stitch lengths for
normal feed and reverse feed.
• The feed dog may touch the movable knife (models with
thread trimmer).
• Large variations in stitch length may occur at slow and
fast sewing speeds.
3066M