4. PREPARATION BEFORE SEWING￿

[Guide to maximum sewing speed for KE-430F]

Use

Max. sewing speed (sti/min)

 

 

Standard hook

Large hook

 

 

 

 

8 layers of denim

3,200

2,500

 

 

 

12 layers of denim

2,700

 

 

 

 

Ordinary materials

2,700

2,500

 

 

 

For knitted materials and

2,500

 

foundation garments

 

 

 

NOTE:

The thread may break due to heat under some sewing conditions. If this happens, reduce the sewing speed, or use the needle cooler (option).

4-6. Thread nipper device

This is used to stop the thread from pulling out at the sewing start, and at times when skipped stitches might easily occur. The thread nipper device operates when memory switch no. 500 is set to "ON". However, some limitations apply. Refer to "6-2. List of memory switches" for details.

* The default setting for this memory switch is "OFF".

[Notes on use]

1. When using the thread nipper device, turn the tension nut (1) (sub-tension) to adjust the upper thread trailing length to 35 - 38 mm.

* Adjust the upper thread trailing length to less than 40 mm after replacing the upper thread also.

2307B

2. If the upper thread trailing length is 40 mm or more, or if the upper thread tension is weak and the upper thread does not form a good seam at the first stitch, the end of the thread that is being held by the thread nipper may become wound around the seam.

Furthermore, if using thick thread that is #30 or higher or if the thread trailing length is too long, an error [E691] may occur.

In any of these cases, use scissors to cut the thread without pulling it up too hard.

4475Q

31

KE-430F, BE-438F