Atlanta Attachment Company 1344S88, Техническое руководство и перечень запасных частей

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Technical Manual & Parts Lists
18
Fig. 13
Alternating Presser with Pneumatic Pressure Control
Adjust the height of the Pressure Cylinder with the presser
feet resting on the throat plate. There should be a clearance
of 1/4” between the Presser Bar Spring Fork and bottom of
the cylinder. To raise the cylinder, loosen the lower lock nut
and tighten upper lock nut, see Fig. 12. To lower the
cylinder, loosen the upper lock nut and tighten the lower lock
nut. When correct adjustment is attained, tighten both lock
nuts.
Regulate air pressure: The correct air pressure is set
for average feeding when the Presser Bar Spring Fork rises
to approximately 1/16” from the bottom of the cylinder.
Upper Feed Roll Pressure
To regulate the pressure of the upper feed roll,
turn the thumb screw as shown in Fig. 13.
Stitch Length
To adjust the stitch length, depress the plunger,
Fig. 15, located on top of the arm. Continue to hold the
plunger down and turn the machine pulley toward the
operator until the plunger enters the notch in the arm
shaft eccentric. Then turn the plunger to lock in
position. Depress the button located on the machine bed. Hold down and turn the machine pulley toward
the operator to increase length of the stitch, or away from the operator to decrease the length of the
stitch. Letter “A” on the machine pulley indicates the lowest stitch. When desired length is indicated by
a letter and is opposite of the arrow on the front of the machine, release button and turn the plunger to
the right or left until it springs outward.
Caution: Never turn the machine pulley with the plunger in the locked position until the button on
the machine bed is depressed.