Brother DA-927A, Инструкция по эксплуатации

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9. STANDARD ADJUSTMENTS
22
DA-927A, DA-928A
9-6. Feed dog height adjustment
Adjust by the height of the feed dog (1) above the needle plate
(2) when the feed dog (1) is at its highest position.
1. Use an Allen key with a width across flats of 3 mm to loosen
the set screw (5) at the bottom of hole (A) in the forward feed
arm cover (4).
2. Adjust the height of the feed dog (1) by turning the feed bar
eccentric shaft (3).
3. Tighten the set screw (5).
Installing the Spacer (For -7 specifications)
If stitch irregularities develop in sewing very heavy materials,
adjust the sub-feed dog (2) to the correct height by installing the
spacer (1).
1. Remove the two screws (3) and then remove the sub-feed
dog (2).
2. Place the spacer (1) under the sub-feed dog (2) and retighten
the two screws (3).
* The spacer (1) is inserted into the accessory part.
9-7. Upper thread take-up guide adjustment
Adjust so that the distance from the center of the upper thread
take-up hole (1) to the top edge of the upper thread take-up
guide (2) is at the distance shown in the illustration when the
needle bar reaches its lowest position.
1. Turn the machine pulley toward yourself until the needle bar
is down at the lowest position.
2. Loosen the screw (3), and then move the upper thread
take-up guide (2) up or down to adjust so that the top edge of
the upper thread take-up guide (2) is at the distance from the
center of the upper thread take-up hole (1) as shown in the
illustration.
* The higher the upper thread take-up guide (2) positions,
the greater the upper thread loops will be.
3. Tighten the screw (3).
針板
4279B
4280B
4278B