JUKI PS-800-12080 Instruction Manual page 84

6-2-4-5. Adjustment of the height of the counter knife and moving knife
Cylinder lifting plate
1) Loosen setscrews ❶ and ❷ of the counter knife base. Adjust the height of the counter knife.
2) In the normally shipped state, the sewing machine has been factory-adjusted so that the height of the
blade point (lower end point) of the counter knife is 3 mm above the top surface of lifting plate ❺ .
If the total thickness of material ❹ and lower cassette ❻ is 3 mm or less, adjustment of the height of
counter knife ❸ will not be necessary.
If this total thickness exceeds 3 mm, it will be necessary to adjust the height of counter knife ❸ . (Up to 5.5
mm)
❶
0.5 mm to 1 mm
❶
Interference with
the top surface of
the lower cassette
must be prevented.
3) After you have adjusted the counter knife to an
❷
4) After you have adjusted the height of the counter
❼
Drive motor
– 81 –
appropriate height, tighten first setscrew ❷ so
that it is flush with the flat part of the counter knife
shaft. Then, tighten setscrew ❶ .
(Fix setscrew ❷ on the flat part of the counter
knife shaft.)
knife, adjust the height of drive motor lifting stop-
per ❼ so that the engagement amount between
the moving knife and the counter knife is 0.5 to 1
mm.
Lifting the drive motor by hand, check to
make sure that the square portion of the
moving knife blade does not interfere
with the top surface of the lower cassette
when the moving knife is at its lower
dead point.
❸
❹
❺
❻
Moving knife