5. ADJUSTMENT

５-２５. Adjusting the needle up stop position

Feed mechanism operates.

Material

Feed mechanism stops

2576Q

3502Q

Loosen the screw (5) (at the U side on the pulley), and turn the pulley (1) so that the mark (2) on the pulley is inside the mark (4) of the belt cover (3). The pulley (1) will stop more slowly if the screw (5) is moved counter to the normal direction of rotation, and will stop more quickly if the screw (5) is moved in the normal direction of rotation.

The standard position is when the needle bar is lowered approximately 5.5 mm from its highest position.

Timing between the needle and the feed mechanism is adjusted so that the feed mechanism starts operating after the needle comes out of the material sewn, and stops before the needle penetrates the material.

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.

５-２６. Adjusting the tension of the upper shaft timing belt

 

1. Loosen the three bolts (1).

Approx. 2.5 - 3.0mm

2. Turn the bolt (3) in the tightening direction to

 

adjust the position of the motor bracket (4) so

 

that there is approximately 2.5–3.0 mm of

 

deflection in the upper shaft timing belt (2) when

 

the middle of the belt is pressed with a force of

 

10 N.

3576Q

129

KE-430B, 430C series