Operation Manual

9
3.3.2
Lifting the thread tension
- automatically with the "presser foot lift"
Bobbin thread
3.4
According to the sub-class, see the maximum limits of the suitable
bobbin thread in the table 1.1.
3.4.1
Winding the bobbin thread (fig. 3)
Pass the bobbin thread
- through the reel stand,
- from left through the rear hole in the thread guide U,
- clockwise between the disks around the adjustable bobbin winder
pre-tension U,
- from right back through the rear hole in the thread guide U,
- from left through the middle hole in the thread guide U,
- from right through the front hole in the thread guide U,
- counter-clock wise several times around the bobbin T,
- pass the excessive thread end in the knife for cutting it off,
- press the bobbin winder lever M. The winder will stop automatically.
- Pull the bobbin thread in the knife for cutting it off.
The bobbin winder pre-tension U should be set so Low that the thread is wound regularly at low tension.
When winding at an excessive pre-tension, the aluminium bobbins T may be separated and
considerable thread cutting disturbances may occur.
3.4.2
Bobbin change
For changing the bobbin,
- Move the thread take-up lever to its topmost point,
- Swing the lever B upwards (for arresting the presser foot in its upper position),
- Lift the flap and remove the bobbin case top from the hook,
- Place the other bobbin so that the bobbin rotates contrary to the thread pulling direction,
- Pull the bobbin thread under the spring d in the slit and advance
it from below through the hole for about 8,0 cm,
- Hold the bobbin case top with bobbin at the free thread end and place it into the hook,
close the fIap.
3.4.3
Adjusting the bobbin thread tension
Rule 1:
Work with the lowest possible bobbin thread tension.
Indication 1:
For correcting, turn the screw.
Rule 2:
For a lockstitch seam, the low bobbin thread tension can already be influenced during the winding