JUKI HZL-E70, Руководство по обслуживанию

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5-1-5 Feed timing
After checking the feed dog height and needle bar height, perform this adjustment.
The feed timing will affect the tightness of the needle thread.
1. Attach HA x 1 #14 needle.
2. Loosen two screws in the main shaft pulley.
3. Turn the hand wheel and lower the needle bar to align
the tip of the needle with the top surface of the throat
plate.
4. Turn the hook driving shaft and move the hook driving
shaft in the direction of rotation so that the top end of
the feed dog aligns with the top surface of the throat
plate in the direction where the feed dog comes down
from the highest point.
5. Temporarily tighten the screws in the main shaft pulley
and check again.
6. After performing this adjustment, check also “Needle-to-hook timing”. How to adjust
* Adjust so that the tip of the needle aligns with the top surface of the throat plate when the feed dog meets with the top
surface of the needle plate. The tolerance is within the range of the tip of the needle to the lower end of the needle hole.
5-1-6 Needle-to-hook timing
Remove the throat plate, base plate, free arm bottom cover and DF installing base.
1. First, make sure that the needle entry position and the height of the needle bar have
been properly adjusted.
2. Select the straight stitch (left needle position).
3. Then turn the hand wheel by hand to bring the needle bar to the lowest point of its
stroke.
4. Further, gradually raise the needle bar by hand and stop it at point C where the center
of the needle aligns with the top end of the blade of the hook.
5. At this time, make sure that dimension D from the top end of the blade of the hook to
the upper end of the needle eyelet is 1.06 to 1.26 mm. When the dimension is not
proper, perform the adjustment below.
How to check
Upper side in the rear
Main shaft pulley
Front side
- 1 3 - - 1 3 -
- 1 3 - - 1 3 -
- 1 3 -
Setscrew of DF installing base (2 places)