Upper tension | 112 |
|
|
|
| |||||
N | = | Setting mark. | The | normal | tension | |||||
|
| setting | is | in the white range between | ||||||
|
| 3 and | 5. | The | higher the number, the | |||||
|
| tighter | the tension. |
|
| |||||
Lower tension |
|
|
|
|
|
| ||||
O | = | Regulating | screw. |
|
|
| ||||
|
| Turn | it | left | for | a looser tension, or | ||||
P |
| right | for a tighter tension. |
| ||||||
= | Both | tensions | are | correct. |
| |||||
Q | = | Upper | tension | too | loose | or | lower | |||
R |
| tension | too | tight. |
|
|
| |||
= | Lower tension | too | loose | or | upper | |||||
|
| tension | too | tight. |
|
|
|
The | correct | lower tension |
|
|
|
| |||
Let | the bobbin | case with a | full bobbin | hang | |||||
down | freely | by | the thread. | It | must | not | slide | ||
down | by its | own weight, but | should |
| |||||
gradually | move | downwards | when | you | jerk | ||||
your | hand | upwards lightly. |
|
|
|
| |||
Once | the | lower tension has been | set |
| |||||
correctly, | only the upper thread tension | ||||||||
should be | adjusted. |
|
|
|
|
4
j
4 | — |
| |
|
I.
10