Singer 211G 155 - Needle Bar Mechanism Adjustments; Needle Bar Rock Frame Alignment; Needle Bar Height Adjustment

can be made synchronous or differentiated with the
lowerfeed. It must be adjusted so that, in zero position
of the synchronous feed, the distance between the
vibrating presser bar in the needle bar rock frame and
the vertically moving presser bar, in the arm, is 2V64 inch
= 8,33 mm {see Figure 21}.
h
Figure 18
For synchronous feed, and for alignment of the
needle bar rock frame, adjust the feed driving eccentric
for zero stitches. Loosen
lock nut "AN", Fig. 18, and
bearing nut "AO". Then move screw "AP", Fig. 18, to
its normal operating position against an inserted V64
inch = 2 mm diameter pin or needle shank in the slot
of the adjustable crank "AQ". Remove the front arm
cover, loosen screw "AR", Fig. 19, and adjust the
needle bar rock frame to the vertically moving presser
Figure 19
bar to obtain the distance between the vibrating pres
ser bar and the vertically moving presser bar as shown
in Figure 21.
For differentiated feed, adjust the feed driving eccen
tric to the desired number of stitches per inch. Loosen
lock nut "AN" and bearing nut "AO". Move screvy
"AP" in the adjustable crank to the back in order to get
a larger movement of the upper feed relative to the
lower feed, and to the front for a smaller movement.
Figure 20
On the 211 G156 MACHINE the needle bar rock
frame is driven synchronously with the lower feed. It
has to be adjusted so that, in zero position, the distance
between the vibrating presser
bar in the needle bar
rock frame and the vertically moving presser bar, in the
arm, is
^V64 Inch = 7,54 mm (see Figure 21).
For alignment of the needle bar rock frame, adjust
the feed driving eccentric for zero stitches, so that it
cannot feed. Remove the front arm cover, loosen screw
"AS", Fig. 20, and adjust the needle bar rock frame to
the vertically moving presser bar to obtain the distance
between the vibrating presser bar and the vertically
moving presser bar as shown In Figure 21.
ADJUSTMENT OF HEIGHT OF NEEDLE BAR
(Figure 21)
The adjustment of the needle bar height can be
checked with two timing marks which are located
approximately 2 inches = 50,8 mm from the lower end
of the bar. The upper mark should be just visible at the
lower
edge of the needle bar rock frame when the
needle bar is in its lowest position. The lower mark
should be just visible when the hook point has reached
the center line of the needle with the feeding mecha
nism in zero position (synchronous on the
211 G155
MACHINE).
The needle bar can be adjusted up or down by loos
ening the pinch screw "AT", Fig. 21, accessible through
a hole in the face plate. This hole eliminates the neces
sity of removing the face plate to make the adjustment.
Securely tighten screw.
From the library of: Superior Sewing Machine & Supply LLC