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Important:
Ensure that the height of the looper thread take-up (5) is not changed. The
hole (3) must always remain above the bar (2) of the thread down-
holder (1).
4. Tighten the fastening screws (6).
5. Straighten up the upper part of the machine.
Important:
For an extreme setting, e.g. shortest possible stitch length and largest
possible thread quantity (flexible seam) it must be ensured that it is possi-
ble for the needle to enter into the thread triangle again securely.
Overly large thread quantities can cause missed stitches.
If for the above settings the stitch length must be increased significantly,
then the thread guide must be reset in direction 0.
Otherwise the looper thread could come off in area X of the thread take-
up disk.
The looper thread would not, during the backward motion of the looper, be
pulled back through the take-up disk as required.
10 Setting the needle protection
Check correct setting
If the looper tip (1) moves to the left and reaches the needle, the needle
point should lie on the looper protection.
If one were to press against the needle at this time, it should not be pos-
sible to press it into the path of the looper tip.
In the lowest needle position, half of the needle eye (2) must remain clear.
Faults due to incorrect setting
• Damage to the looper
• Damage to the needle
• Missed stitches
• Thread breakage
Sequence
Prerequisite:
A straight and undamaged needle must be used ( Operating Instruc-
tions, Replacing needles)
56
WARNING
Risk of injury
Risk of crushing from moving parts
Switch off the sewing machine before setting the needle
protection.
Setting the needle protection
Service Instructions 610/630 - 00.0 - 10/2014
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