7. CORRECT USE
30
KE-434C,435C
7-6-2. Guide to maximum sewing speed
Max. sewing speed(rpm)
Use
Standard hook
Large hook
8 layers of denim
2,500
2,500
12 layers of denim
2,300
Ordinary materials
2,500
2,500
Note:
The thread may break due to heat under some sewing conditions.
If this happens, reduce the sewing speed, or use the liquid cooling tank (option).
7-6-3. Lower thread tension
Adjust the thread tension to the weakest possible tension by
turning the thread tension nut (1) until the bobbin case will not
drop by its own weight while the thread end coming out of the
bobbin case is held.
7-6-4. Upper thread tension
Turn the tension nut (1) (main tension) to adjust the tension as
appropriate for the material being sewn.
Furthermore, turn the thread nut (2) (sub-tension) to adjust the
remaining length of upper thread to 35 - 40 mm, when the thread
take-up lever is not used.
2536Q
Weaker Stronger
2537Q
Weaker
Stronger
Weaker
Stronger
