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6. Adjustment of the hook-to-needle clearance
Requirement:
At the settings for straight stitch and “middle” needle position, the distance of the sewing hook point
from the bottom of the scarf in the needle (130/705 H system) must be 0.05 mm to 0.1 mm (fig. 6).
With the right needle swing of the widest zigzag stitch, the sewing hook point must almost touch the
needle.
Check:
● Remove the presser foot completely and unscrew the needle plate.
● Remove the bobbin case.
● Insert a new size 80 system 130/705 H needle.
● Check the hook-to-needle clearance for straight and zigzag stitch.
● To do this, set control knob to the straight stitch and the widest zigzag stitch alternately.
Adjustment:
● Remove the detachable work support (accessory box) by pulling it to the left.
● Lay the machine on its back.
● Turn out the five baseplate retaining screws and remove baseplate.
● Turn out both free-arm cover retaining screws 68 (fig. 6d).
● Remove free-arm cover 19.
● Disconnect the spring of the gear housing cover.
● Turn out retaining screws of gear housing cover and remove gear housing cover 18.
● Set control knob to straight stitch and “middle” needle position (fig. 6b).
● Loosen screw 24 with a 2.5 mm Allen key (fig. 6c).
● Move the long hook shaft 25 just 0.5 mm to the right.
The gears 23 and 61 must remain engaged!
● Tighten screw 24 slightly.
● Loosen screws 20 and 22 with a 2.5 mm Allen key.
● Move the hook race 21 so that the clearance is equal to 0.05 - 0.1 mm (fig. 6).
● Set control knob to the widest zigzag stitch.
● Turn the hook race, without shifting it, until the left and right needle entry points are set at equal
distances in the cutout of the thread deflector plate (fig. 6a).
● Tighten both screws 20 and 22.
● Loosen screw 24.
● Move the long hook shaft 25 to the left until there is no longer any play between the gears 23 and 61
and they move easily.
● Tighten screw 24.
Test:
● Check the hook-to-needle clearance at straight and zigzag stitch setting, and left and right needle
entry points in thread deflector plate.
● Tighten both screws 20 and 22 again.
● Fit gear housing cover 18 with the retaining screws and connect the spring (fig. 6d).
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