Manufacturing Process Analysis Midterm

Needle

Main component of the sewing machine arm

Needle bar

Part of the sewing machine that holds the needle in place

Binding

Creates a bound seam

Attachments

Measure and guide the material by length, cut, count, etc.

Butt

End point of the needle that is attached/mounted into the machine

Clearance

Space between the underside of the presser foot and throat plate

Blade

Used to cut threads, located along the left side near the back of the sewing machine

Stitch regulator

Tiny computer attached to a sewing machine that constantly adjusts the machine's stitch speed

Take-up

Lever above the presser foot, pulls the thread from the spool to feed it through the machine

Unison feed

Combo of needle feed and walking foot system

Chain stitch

Type of stitching where one continuous thread is looped back on itself, meaning there is no bobbin thread

Cloth point

Makes round holes by pushing through fabrics

Compound feed

Needle, feed dogs, and feet work together to move fabric through machine

Feed dogs

Little teeth that feed fabric evenly throughout

Leather point needles

Specialized shape point made to cut through that material

Differential drop feed

Controls movement of both front and rear feed dogs

Unit drop oscillation feed

Movement occurs when needle is out of the fabric, free-motion sewing

Automatic lubrication

a system that delivers controlled amounts of lubricant to multiple locations on a machine while the machine is operating

Presser Foot

keeps the fabric flat so that it does not rise and fall with the needle and pucker as it is stitched

Presser foot bar

to place pressure on the feed-dog so that the fabric we have placed between the feed dog and the presser foot does not shift.

Rotary Hook

bobbin driver design used in lockstitch sewing machines since the 19th century, catches the thread in place from right to left

face plate

covers the inner workings of the machine (located to the left of the take-up lever;

feed mechanism

basic motion of needles, loopers and bobbins, the material being sewn must move

looper

a guide to place/loop the thread

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.

Machine Pulley

operates like a lever with equal arms— changes the direction of the input force

reversible feed

machine stitches as readily in a reverse direction as it does in a forward direction

treadle

powered mechanically by a foot pedal that is pushed back and forth by your feet

tension

the amount of thread that can pass through the machine to create the stitch.

throat plate

A small opening in the plate allows the bobbin thread to come out and the needle to pass through to make stitches.

check spring

Evens out tension fluctuations

Which of the following organizations currently publishes a sewing standard manual, classifying stitches,

seams and stitchings?

ASTM - American Society for Testing and Materials

The 500 class (sub)types of stitches, used for joining garment parts together:

make durable seams with a wide range of stretch characteristics

The 516 'true' safety stitch is a combination of a 401 chainstitch and a type of a

500 overedge stitch

Bobbin loading, unloading and re-loading time is a consideration when using any chainstitch machine. F

false

The 600 Coverstitch class includes stitch types producing strong, flat seams that also stretch.

true

13. The original publisher of the ASTM stitch and seam classification standard was the U.S. Government.

which is true

Stitch type with the least amount of stretch relative to other, comparable stitch types

301 lockstitch