Brother S-7300A Service Manual page 134

7. ADJUSTMENTS
7-5-4-2. Adjusting the feed dog angle
(1)
(6)
Raises the
front
Lowers the
front
Parallel
Back is lowered
Standard
Back is raised
123
0917D
Front is raised
Needle
plate
Standard
Front is lowered
0932D
Front is raised
Standard
Front is lowered
0933D
S-7300A
1.
Turn on the power.
2.
Start backtack sewing, best PFM mode, slow start, special
locus and X-over seam assist will turn off.
3.
Set the feed pitch to 3 mm (for -[][]3 specifications) or to 5
mm (for -[][]5 specifications). (Refer to "5-4-3. Main
sewing settings" in the Instruction Manual.)
4.
Press the menu key (1).
* The standard angle for the feed dog (2) when it is lowered
until its top is flush with the top of the needle plate is for
the O mark in the feed bar shaft (3) to be aligned with the
feed rocker bracket arm (4) and for the feed dog (2) and
to be parallel to the needle plate.
5.
Turn the machine pulley to move the feed dog (2) to its
highest position above the needle plate.
6.
Tilt back the machine head.
7.
Loosen the set screw (5).
8.
Turn the feed base shaft (3) in the direction of the arrow
within a range of 90º with respect to the standard position.
(Figure <C>)
In order to prevent puckering, lower the front of the
・
feed dog (2).
In order to prevent the material from slipping, raise the
・
front of the feed dog (2).
9.
Securely tighten the set screw (5).
10.
Press the home key (6).
* If you would like to tilt the feed dog (2) further, turn the
feed lifting rock bracket stud (7) while carrying out the
above adjustment. (Figure <D>) (Refer to "7-5-4-1.
Adjusting the feed dog height" on the previous page for
details of this operation.)
* The height of the feed dog (2) will change after the angle
has been adjusted, so it will be necessary to re-adjust the
height of the feed dog (2).