Service manual

S-4000 ISBH+I Omron
Revised 11/2009
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Phone: [phone] (Service), [phone] (Spare Parts); Fax: [phone]
1-47
19. THE MAIN CAM CHANGE
1. Loosen the screws ➊ and remove the holder ➋.
2. Unscrew the screws ➌ and remove the right control
spring Í and the holder Î.
3. Loosen the stud ➏ and remove the worm gea
hub and the main cam assembly ➐. Dismantle
the assembly.
4. Assemble the main cam assembly according to the
following steps:
a) Install the washer ➒ on the barring cam ➑.
The mounting hole must be covered.
b) Install the feed reversing cam Ó by the same
way
.
c) Place the stop disc
on the feed reversing
cam Ó and fix it using the screws and .
d) Insert the springs into the holes in the stop
disc and install the drive disc spring . Lock it
using two screws .
5. Remove the spring from the pin .
6. Using a grease, place the thrust washer on a
bedplate.
7. Install the main cam assembly ➐ and the worm gear
hub on the thrust washer. Lock it by stud ➏.
8. Install the spring on the pin .
9. Install the holder ➎,control spring ➍ and tighten
the screws ➌.
10. Install the holder ➋ and lock it by screws ➊.
11. Turn the hand wheel to check the clearance on the
main cam - see section E9, point 3.
12. Switch the machine on and check if the machine
stops in the home position - see section E2, E9,
point 1
13. Check the shape of a bar - see E9, point 2.
14. Sew a few buttonholes . The shape of a bar must be
as shown on picture below.
15. If incorrect, tilt the machine head and move the left
shifter arm to the left to obtain correct shape of a
bar (the clearance between the control spring and
the shifter arm spring must approximately be
1,2 - 1,5 mm)
E - MACHINE ADJUSTMENTS