A "free arm" sewing machine is built so part of the machine is elevated above the surface you have placed your sewing machine on. This enables the person using the machine to sew something with a small diameter like the hem of a sleeve or pants.
A free arm sewing machine has a piece that can be removed or lowered so you can work on small sleeve or leg seams that are already sewn together. A flat bed sewing machine has a sewing surface that can not be changed to accommodate such small tubular type seams.
This number is the style of the electric motor. The machine serial number is probably on the big flat machine base just below the electric motor
Early machines used the pedal as power. Th operator would pedal in order to make the machine sew. In modern machines in control the sewing action by stopping and starting and controlling the rate.
The "second thread in the belly of the sewing machine" is called the bobbin thread. To pull up the bobbin thread, first make sure that you've threaded your machine (correctly! <grin>). Presser foot should be up. Then pull about 6" of thread and anchor it to the base of the machine with your left hand finger. By hand, crank the flywheel one revolution and voila`, the bobbin thread will pull out. You can use a flat tool to sweep from front to back underneath the sewing foot to get the tail behind the presser foot. Sometimes it takes one or two tries to get it.
They should sit down flat on the fabric, but should not be so tight that the fabric tewns to ruckle up.
It keeps your fabric flat and away from all the mechanical parts of the machine that could damage your fabric. Also, many throat plates have measurement lines on them, and those help you to create consistent measurement seams and hems.
If you want to replace the needle on your sewing machine, you unscrew the thumbscrew behind and above the needle (with the presser foot down) and remove the old needle. Then hold the new needle under there with the point down and insert it into the slot. The slot is usually half round, half flat so you have to be sure the flat part of the needle matches the flat part of the slot. When it is in there, you just finger tighten the thumbscrew and you are ready to go.
The presser foot grabs the fabric and pulls it through.
You select the right needle for your sewing machine by the type of fabric you are using. For instance, you would use a #18 for leathers and a #11 ballpoint for lightweight knits and a #14 for linens. The place you buy needles has a chart for what you need.
Ruth Reetz has written: 'The flat method of sewing for synthetic suedes, knits and wovens too' -- subject(s): Sewing
An inclined plane is a simple machine that can be described as a flat surface that is slanted
If your fabric is puckering, you need to check your thread tension and adjust as needed until you have flat stitching. Another solution would be to completely untread and rethread your machine and rewind the bobbin using a medium speed for the thread loading.
A Satin Stich is a long straight embroidery stitch, giving the appearance of satin.