Buttonholing; Disengaging The Main Shaft; Main Shaft Disengaging Stopper - ELNA E9020 Service Manual

(19) Buttonholing

Slightly loosen screws 3 and 4. move the buttonholing switch (BH SW) in the direction of the
arrow to adjust so that, when the buttonholing change-over lever is pressed against the projection
of the buttonholing foot, the contact point on the stop side of the buttonholing switch (BH SW) is
spaced 0.1 to 0.3 mm from the stopper.
• The stitch made at the end of right-hand parallel sectionof a buttonhole should not go beyond
the first bartacks, or should not leave any space between the stitch end and the bartacks.

(20) Disengaging the main shaft

™ Relation of the position of the main shaft disengaging cam and the main shaft disengaging
link
1) Provide a clearance of 1.6 mm between the main shaft hand wheel and the main shaft
disengaging cam using a spacer or the like.
2) Loosen adjustment screw 1 (1 pc.) and setscrews 2 (3 pcs.) in the needle throwing STM
installing plate and move needle throwing STM installing plate 3 to the left or right to adjust
the dimension of main shaft disengaging cam 4 and main shaft disengaging link 5 to 2 mm.
Then tighten setscrews 2 (3 pcs.) in the needle throwing STM installing plate.
(Note) When this adjustment is performed, the needle entry point shifts. Perform again
the needle entry adjustment.
3) After this adjustment, perform (21) Main shaft disengaging stopper adjustment

(21) Main shaft disengaging stopper

1) Provide a clearance of 1.6 mm between the main shaft hand wheel and the main shaft
disengaging cam.
2) Loosen adjustment screw 1 in the main shaft disengaging
stopper, make the top end of the main shaft disengaging
stopper come in contact with the stopper spring section of
the main shaft disengaging cam, and tighten adjustment
screw 1 in the main shaft disengaging stopper.
3) After the adjustment, apply grease to the sections below.
(1) Joint of the main shaft disengaging cam and the main
shaft hand wheel
(2) Cam section of the main shaft disengaging cam
(3) Top end section of the main shaft disengaging stopper
How to adjust
How to adjust
How to adjust
Stopper
To make top end of the stopper
come in contact with the stopper
spring
Disassembly
Location of components to be adjusted
Disassembly
A to E on page 15
Location of components to be adjusted
Cam
27
Adjustment drawing
0.1 to 0.3
Stopper
Contact
point of the
stop side
4
3
Adjustment drawing
Main shaft
hand wheel
Main shaft 1.6 mm
disengaging cam
2 mm
4
5
3
2
1
2 2