2.Clean your machine. Somewhere with the accessories that came with the machine there should be a small lint brush. If not you can use a small paint brush or buy one at a fabric store or store that sells machines. Clean open the area where the bobbin, remove the bobbin and the bobbin casing, (look at your manual) put any screws in a safe place. Use the brush to clean the lint and little pieces of thread from the area. Some web sites will tell you to use canned air to blow the debris away but I would not since that might blow the stuff deeper into the machine. Oil moving parts, (see below) Put the bobbin casing back together. Now go to your tension disk area. Take a thin piece of papper and run that between the discs. If you can open the head of your machine do so and use the brush to clean there. I do a quick cleaning when I change the bobbin and a more thorough cleaning when I've gone through the 4 or 5 bobbins I have prewound. Clean the feed dogs while you have the brush out.
3.Oil your machine. Most modern machines are self oiling, but I still put a drop or two of lubricant on any moving parts that I can reach. Use oil for sewing machines the oil from your garage will not work and will mess up the machine. You might have remove a few screws to reach places.
4.Change your needle often. I change mine after every project at least. It's also the second thing I do if my machine is acting up, right after re-threading the machine. 5. Some sites with more details on how to maintain your machine. The last one is a diagram of a generic machine. basic ssewing machine maintenance, sewing machine maintenance 2, http://sewingschool.org/2010/11/10/meet-your-machine-anatomy-of-a-sewing-machine/
Troubleshooting some things to check or do when the machine isn't working right.
1. Re-thread the machine
2. Replace the needle.
3. Check your tension (especially if you have any little ones around who like to turn dials)
4. Check your manual to make sure you are using the correct thread and needle for your project.
5. If your machine won't run at all make sure it is plugged in and any switches (light switch, strip switch) is turned on and that the foot pedal is attached correctly.
6. Make sure the bobbin winder spindle is in the correct position.
In quilting we use what we call a ¼ or quarter inch seam allowance.
It is realy a scant ¼ inch seam allowance. That means it is just few
thread widths narrower than a true quarter inch. This is important when
your blocks have to be say exactly 12 ½ inches unfinished and there are a
lot of pieces to the block. Finding this magic spot on your machine is
easy but might take you a few tries.
Cut some light and dark colored fabric strips 2 X 4 inches.
On your machine either use a quarter inch foot or if you use the
standard foot find the quarter inch mark on the needle plate. Take one
light strip and one dark strip. Sew together lengthwise with edges
aligned with either the quarer inch foot or the mark on the plate.
Sew another light strip to the dark strip again lining up the edges to
creat a quarer inch seam allowance.
Press the seam allowances to the dark fabric.
Take a ruler and measre the center dark strip from seam to seam (right
side up) It should measure 1 ½ inches wide it's entire length. The two
light strips should be 1 ¾ inches.
If they are you are good to go. If you used the marking on the plate I
would suggest putting some masking tape along that line to make it
easier to find and follow.
If the measurements aren't right there are a few options.
If you can move your needle position in small increments move it maybe
one or two. Move it in (to the right) if the dark fabric was narrower
and to the out (to the left) if it was too wide.
Try again with 3 new strips and remeasure.
If you can't move your needle you will have move the fabric. First try
taking a ruler (a ruler for rotary cutting works best) with ¼ inch
markings and placing it under the needle (might want to turn the machine
off here so you won't accidentally start the machine and hit the ruler
or a finger with needle.)Put the ruler with it's 1st quarter-inch mark
just below the needle's tip. Make sure the ruler is straight and compare
it edge with the marks on the plate or with the quarter- inch foot. If
it appears to be right on with what you had previously followed nudge
the ruler a little so the needle is just a smidgen to the right of the
quarter inch mark on the ruler. Put a piece of tape on the plate it's
edge flush with the rulers. Try another set of strips. You might have to
try a few more times. Just move the tape a little each time. When you
find the correct position put two or three more pieces of tape directly
on top of the first. This will give you your correct scant quarter of a
inch mark.
A hint once you get a set of strips sewn exactly save it! That way if
the tape gets moved or you are using a different machine you can use the
strips as a guide with out going through everything again.
Also if some reason you are using thicker fabric, like flannel you might
want to do strips with that fabric. http://quilting.about.com/od/machinepiecingyourquilts/ss/seam_allowance_2.htm and
finding 1/4 " seam allowance
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