Chandler 543 - Page 5

MECHANICS IISTRUOIOIIS
TIMING THE FINGER
Lateral Setting - (Controlled by Barrel Cam I, Figure 3)
1 When the Finger has reached its most forward lateral position, the
point of the Finger should extend approximately 1/32" beyond the
front edge of the slot in the Throat Plate as shown below in
Figure 3A.
To
adjust, loosen Screw EA (Figure 3) and move Shaft F forward
or backward the desired amount. {In moving Shaft F forward, make
sure that Eccentric Finger G does not bind against shoulder of
Eccentric J, otherwise Finger G will have to be moved back the
same amount Shaft F is moved forward.)
Radial Setting - (Controlled by Eccentric J, Figure 3)
2
When the Needle is at the very bottom of its stroke there should
be approximately 1/16" clearance between the Needle and the back
edge of the Finger as shown in Figure 3B.
Tc. adjust, loosen Clamp Screw GA (Figure 3) and move the Finger
into correct position, and tighten Clamp Screw GA securely.
Turning the machine slowlf in the direction of normal operation,
observe carefully that at the instant the point of the Needle has
cleared the Finger, the Finger must start its counterclockwise
movement. The Finger should move backwards and sideways at the
same time. Dotted line in Figure 3C shows approximate path of
Finger point. Barrel Cam I must be adjusted to pull Finger side-
ways at the same time that Eccentric J moves Finger backward.
To
adjust, loosen 3 Set Screws H (Figure 3) and retard or ad'vance
Finger Eccentric on Shaft the desired amount. Retighten Screws
securely after making adjustment.
FIGURE 3
FIGURE 3A
FIGURE 38
Finger moving forward Finger position from
while Needle descending. time Needle enters
Throat Plate hole
and returns.
Dotted II ne shows path
of Finger point. Finger
starts moving backward
and sideways as soon
as Needle clears back
of Finger.
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CHANDLERS
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From the library of: Superior Sewing Machine & Supply LLC