Feed Dog Angle; Feed Dog Forward/Back And Sideways Position - Brother Z-8550A Service Manual

9. ADJUSTMENTS

9-6. Feed dog angle

Standard
Lowers the front
Raises the front

9-7. Feed dog forward/back and sideways position

71
(Front)
The standard angle for the feed dog (1) is for the top of the
3517M
needle plate to be parallel with the top of the feed dog (1)
(for the 8550A) or raised slightly at the side closest to the
operator (for the 8560A) when the feed dog (1) is raised to
its highest position above the needle plate. (With the
mark on the feed bracket shaft (2) aligned with the mark on
the feed rocker bracket arm (3)).
1. Turn the machine pulley to move the feed dog (1) to its
highest position above the needle plate.
2. Tilt back the machine head.
3. Loosen the set screw (4).
4. Turn the feed bracket shaft (2) in the direction of the
arrow within a range of 90º with respect to the standard
position.
• In order to prevent puckering, lower the front of the
feed dog (1). (Fig. A)
• In order to prevent the material from slipping, raise the
front of the feed dog (1). (Fig. B)
5. Securely tighten the set screw (4).
* When the angle of the feed dog (1) is adjusted, the height
and forward/back position of the feed dog (1) will also
change and will need to be readjusted.
3518M
Adjust the sideways clearances X between the feed dog (1)
0140B
and the needle plate so that that are approximately equal.
Adjust so that the clearances Y between the front and back
of the feed dog (1) and the needle plate are approximately
equal when the machine pulley is turned until the feed plate
(2) is moved to its furthest forward position and also when it
is moved to its furthest back position.
<Sideways clearance X adjustment>
Loosen the two screws (3) of the fed dog (1), and adjust the
position of the feed dog (1).
If adjustment is not possible using this method, adjust using
the following method.
<Forward/back clearance Y and sideways
clearance X adjustment>
Loosen the two screws (5) of the feed rocker bracket arm (4)
and adjust the position of the feed dog.
0141B
Z-8550A, 8560A