Checking The Thread Tension - Medion MD 11836 Bedienungsanleitung

Checking the thread tension

EN-16
Checking the lower thread tension
The easiest way of checking the lower thread tension is by sewing a
medium zigzag stitch on the fabric in question.
Use the appropriate needle and threads.
You can get a clearer picture by using different colours for the upper
and lower threads.
Sew a few zigzag stitches.
The thread tension is correct if the lower threads are not visible on
the top surface of the fabric.
Make sure that you always sew even stitches (see diagram on the
left).
Correct stitches
The tension of the upper and lower thread should be sufficient to
ensure that the threads interlace in the middle of the fabric.
The fabric remains smooth and does not pucker.
Incorrect stitches
Upper thread is too tight and pulls the lower thread up. The lower
thread is visible on the upper fabric layer.
Solution:
Reduce the upper thread tension by turning the upper thread tensi-
on regulator (2) to a lower number.
Upper thread is too loose. The lower thread pulls the upper thread
down. The upper thread is visible on the underside of the fabric lay-
er.
Solution:
Increase the upper thread tension by turning the upper thread ten-
sion regulator (2) to a higher number.
In both cases in which the stitching is incorrect, you may also need
to adjust the lower thread tension.