Adjusting The Safety Switch Position - Brother T-8421D Instruction Manual

Adjusting the safety switch
position
The standard installation position for the safety switch
(2) is shown in the illustration. At the time of shipment
from the factory, dimension (A) is adjusted to 3 mm,
and normally this does not need to be readjusted.
However, if the dimensions of the work table make it so
that the clearance (1) between the machine bed and
the table hole is wider or narrower than the standard
clearance, it may have an adverse effect on the
operation of the safety switch (2), and if this happens,
dimension (A) should be adjusted.
If the stroke (6) of the spring is small, the operation
of the safety switch (2) will become poorer, and so
the sewing machine may not operate even when
the treadle is depressed.
The standard amount of clearance (1) between the
machine bed (4) and the hole in the table (5) is 1.5
mm.
(2) Safety switch
(3) Screw
1
Loosen the screw (3).
2
Adjust the installation position of the safety switch
(2) horizontally so that the clearance (B) between
the safety switch (2) and the hole in the table (5)
is 4.5 mm.
3
Tighten the screw (3).
Related Information
• Carrying out test sewing on page 15
73