Operation Manual

5.6 Adjusting looper-thread tension

Caution - danger of injury

Turn off the main switch.

The looper-thread tension may only be adjusted with the

sewing machine switched off.

Adjusting tensioning spring 2

–

Release right-hand needle-plate slide and push aside.

–

Adjust tensioning spring 2 by rotating regulating screw 1.

To increase looper-thread tension:= rotate screw 1 clockwise

To decrease looper-thread tension= rotate screw 1 anti-clockwise

–

Push needle-plate slide back into place.

Note:

The conical spring in the bobbin housing has the following functions:

–

When the bobbin-housing shutter is open it raises the bobbin slightly for removal.

–

It prevents the bobbin from "running on" when the machine halts or if the looper

thread is wound off spasmodically.

5.7 Fitting and replacing the needle

Caution - danger of injury

Turn off the main switch.

The needle may only be changed with the sewing machine

switched off.

–

Rotate the handwheel until the needle bar 3 has reached its uppermost position.

–

Undo screw 4.

–

Draw the needle downwards out of the needle bar 3.

–

Insert a new needle as far as it will go into the hole in the needle bar 3.

Important

When viewed from the operating side of the sewing machine the furrow 5 of the

needle must point to the right (see sketch).

–

Tighten screw 4.

IMPORTANT

When fitting a thicker needle the distance of the shuttle

from the needle must be corrected (see Servicing

instructions).

Failure to comply with the above note may lead to the following errors:

when fitting a thinner needle: faulty stitches, damage to thread

when fitting a thicker needle: damage to the shuttle tip and needle