2-11. OPERATING PROCEDURES FOR CLOTHING SEWING MACHINE - continued.
Adjusting Pressure on Foot Presser.
Tension should be adjusted or regulated only when the presser foot is down.
(1) For the needle to make a even stitch, the material must move forward at a uniform speed. The
correct presser foot pressure on the material enables the feed dog to push the material forward
each time the needle goes up. If the pressure is too light, the feed dog will not feed the material,
the needle will hit in one place on the material, and the bobbin thread will knot or ball up. If the
pressure is too great, the feed dog will wear unnecessarily and feed the bottom material (fabric or
cloth) faster than the upper material.
(2) Turn the pressure regulator thumbscrew (1) on top of the machine clockwise to increase the
pressure or counterclockwise to decrease the pressure.