Needle Drop Position - ELNA eXcellence 780 Service Manual

Needle drop position

When the straight stitch is selected, the needle should be positioned in the center of the needle plate hole.
When the needle drop position is set at "0.0" and "9.0", the clearance between the side of the needle and the needle
hole should be 0.2 mm or more.
Fig. 1
Needle hole
"0.0"
0.2 mm or more
Mechanical Adjustment
Needle drop position "4.5"
"9.0"
0.2 mm or more
A = B
Hexagonal
socket screw
Eccentric
pin
To adjust:
1. Attach the #14 needle. Turn the power switch ON and
select straight stitch #1.
2. Check the clearance between the needle and the side
of the needle hole when the needle drop position is
set at "0.0" and "9.0" respectively.
3. If the clearance is less than 0.2 mm, adjust it as
follows.
Loosen the hexagonal socket screw (use an Allen
wrench of 2 mm width across flats).
4. Turn the eccentric pin to get 0.2 mm or more clearance.
The direction of eccentric pin should be as shown.
Tighten the hexagonal socket screw.
Attach the straight needle plate and check if the
needle drops in the center of the needle hole. Check
the hook timing and the needle bar height after this
adjustment (see page 20 and 21).
Pin
Eccentricity
17