What do you call the part of the machine that controls the length of the stitches?

What part of the sewing machine controls the length of stitches?

3.01 SEWING MACHINE PARTS

A B
regulates the width of zigzag stitching and positions the needle for straight stitching stitch width control
regulates the length of the stitch stitch length control
located directly under the needle; usually has guidelines to help keep stitching straight needle or throat plate

What controls the sewing machine?

Hand wheel controls the movement of the take up lever and needle; can be controlled by power or by hand; should ALWAYS be turned toward you.

What are the parts of a machine?

These elements consist of three basic types (i) structural components such as frame members, bearings, axles, splines, fasteners, seals, and lubricants, (ii) mechanisms that control movement in various ways such as gear trains, belt or chain drives, linkages, cam and follower systems, including brakes and clutches, and …

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