10. STANDARD ADJUSTMENTS
40
BE-438C
10-11. Adjusting the needle up stop position
The needle up stop position is adjusted so that the index
mark (2) on the machine pulley (1) is inside the mark (4) on
the belt cover (3).
If adjustment is necessary, loosen the screw (5) at the “U”
mark of the machine pulley (1) and adjust the position of the
machine pulley (1). The machine pulley (1) stops later if it is
turned clockwise, and it stops earlier if it is turned
counterclockwise.
Note:
The screw (6) at the “D” mark is an adjusting screw for
the needle down detection function and is adjusted to
match the feed timing, so it should not be loosened.
The screw (7) is a screw for detecting the machine stop
position, and should not be loosened.
*
If the index mark (2) is not inside the mark (4) when the
sewing machine is started, error code “E-50” will be
displayed. Turn the machine pulley to move the index
mark (2) to the correct position and then start the sewing
machine.
10-12. Adjusting the thread wiper
1. Loosen the set screw (2) and move the wiper arm support (3) up or down to adjust so that the clearance between the top of
the thread wiper and the needle point (1) is 2 ± 0.5 mm when the thread wiper is aligned with the center of the needle.
* Before carrying out this adjustment, check that the needle bar is lowered 3.5 to 4 mm from the needle up stop position
when the sewing machine stops.
2. Loosen the screw (4) and move the thread guide connecting plate (5) up or down so that the thread wiper is approximately
20 mm from the needle when it is at the standby position.
2576Q
2578Q
2579Q
2577Q
2580Q
2
±
0.5mm
Approx.
20mm
