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MA_325-40D-TP_A9_181015_en
3.5
After removing head cover and thread tension adjusting knob, turn needle lever
sufficiently downwards, so that the eccentric bolt (1) can be reached with a
screw driver through the, hole in the head provided for that purpose. After
loosening the nut (6) and turning the bolt (in its rear area), the needle lever race
is corrected. The distance between the hook point (upon standard stroke of
loop and position over the center of the needle) and the extreme of the needle's
eye turned against it:
1.8 ± 0.2 mm.
Setting the needle lever path (Fig. 1)
3.6
The feed eccentric (1) (
Adjusting feed motion
Fig. 5) on the main shaft should be set so that the feed
motion starts when the needles 5 eye - in case of stitch length of 6 mm,
measured on the lower feed - is placed upon its return motion
5 - 1 mm in front of the plunger center.
Fig. 5
3.7
Upper and lower feeds must move synchronously. The length of the upper feed
motion can be adjusted by means of a pedal (Upon request by knee-lever),
continuously adjustable from 4 - 12 mm. With the maximum feed length the
upper feed should be centered in a manner that an equal distance from the
plate opening results upon its front and rear turning points.
Adjusting upper feed
The height of the upper feed, which is set on unvariable motion, must be
adjusted so that upon feeding and with the feed dog parallel to the lower feed,
its toothing projects about one tooth height over the lower edge of the stitch
plate (Fig. 6a).
