Mf-7900-E11; Specifications; Adjustment Procedure Of Engagement Amount Of Knives - JUKI MF-7900 Series Engineer's Manual

10. MF-7900-E11

(1) Specifications

Model MF-7900-E11
Class name Right-hand fabric undertrimmer for pre-closed elastic attaching with tension roller
Pre-closed waist elastic attaching of men's brief, trunks, etc.
Application
(Waist elastic width up to 40 mm)
Max. 5,000 sti/min (provided with PL12 or PL13) (at the time of intermittent operation)
Sewing speed Speed of stitch at the delivery. 4,000 sti/min (provided with PL12 or PL13)
(at the time of intermittent operation)
Needle 3-needle 5.6 mm, 6.4 mm
gauge 2-needle 4.0 mm
Feed ratio 1 : 0.7 to 1 : 1 (Pitch less than 2.5 mm)
Stitch length 0.9 to 3.6 mm (Adjustable up to 4.5 mm)
- Equivalent continuous emission sound pressure level (L
Noise A-weighted value of 78.5 dB; (Includes K
-ISO 11204 GR2 at 4,000 sti/min.

(2) Adjustment procedure of engagement amount of knives

WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❶
❸
❷
❸
= 2.5 dB); according to ISO 10821- C.6.2
pA
When adjusting the engagement, perform the work
after confirming regarding the height of counter knife
❸ that the upper surface of the counter knife ❸ is
flush with the upper surface of the throat plate or the
former is installed slightly lower than the latter.
Loosen clamping screw ❶ in the state that moving
knife ❷ comes down to its lowest position, and ad-
just the engagement amount of the moving knife ❷
and counter knife ❸ to approximately 0.5 mm.
– 128 –
) at the workstation:
pA