–
57
–
Adjustment Procedure
Results of Improper Adjustment
Checking items:
1
Upper knife
2
Feed dog
3
Throat plate
* The standard timing is achieved in the case the upper knife is brought
to its upper dead point when the feed dog starts coming down.
(The upper dead point of the needle bar is approximately aligned with
the upper dead point of the knife.)
(The knife cuts the material when the feed is positioned below the
throat plate.)
How to perform adjustment:
○
Loosen screws (A). Remove cover (B).
○
Loosen screws (D) of cam (C).
○
Turn the main shaft while keeping the screw No. 1 of the cam held
perpendicularly until the position where feed dog starts coming down
is reached. When that position is reached, tighten screws (D). (The
upper dead point of the needle is approximately aligned with the up-
per dead point of the knife.)
○
Turn the mains shaft to check that the shaft can be turned smoothly.
○
Install cover (B) with screws (A). Tighten the screw on the side of the
cover rst.
If the knife timing is not correct, the
material can be fed while the upper
knife is descending to cause puck-
ering and irregular feed.
To Next Page
Loading...
Need help?
General
