HE-800C
4. PREPARATION BEFORE SEWING
27
4-5-2. Upper thread tension
Whip stitch (plain stitch)
To ensure that neat seams will be sewn in the bar tacking areas and zigzag areas, adjust the upper thread tension while the
zigzag tension discs are open as shown in "[A] When the zigzag tension discs (1) are open” below.
Purl stitch (seal stitch)
1. First, to ensure that neat seams will be sewn in the bar tacking areas, adjust the upper thread tension while the zigzag
tension discs are open as shown in "[A] When the zigzag tension discs (1) are open” below.
2. Next, to ensure that neat seams will be sewn in the purl areas, adjust the upper thread tension while the zigzag tension
discs are closed as shown in "[B] When the zigzag tension discs (1) are closed” below.
Adjustment method
Use threading mode to adjust by the procedure given
below.
In addition, the procedure is safe because the sewing
machine will not start up, even if the treadle is depressed.
[A] When the zigzag tension discs (1) are open
1. Press the THREAD key.
(The sewing machine will switch to threading mode.
The zigzag tension discs (1) will be fully opened.)
2. Turn the tack tension control (2) to adjust the tension
for the bar tacking area and the zigzag area.
3. Measure the upper thread tension as shown in the
illustration.
4. Press the THREAD key to exit threading mode.
[B] When the zigzag tension discs (1) are closed
1. Press the THREAD key.
(The sewing machine will switch to threading mode.)
2. Press the
▼
key.
(The zigzag tension discs (1) will be fully closed.)
3. Turn the zigzag tension control (3) to adjust the
tension for the purl area.
4. Measure the upper thread tension as shown in the
illustration.
5.
Press the THREAD key to exit threading mode.
[A] Zigzag areas
[A] Bar tacking areas
Whip stitch (plain stitch
）
Purl stitch (seal stitch)
[A] Bar tacking areas
[B] Purl areas
4775M
4774M
Open
4776M
Closed
