When I move my needle to 4.0. Or 4.5, the needle now moves to far over to the right.

The needle, on the other hand, does not move in either direction, and the dial emits an audible beep beep noise, as if I had moved it too far in either direction . Because of this behavior, it appears as though I have gone beyond the dial's maximum adjustment range.

Make sure that the needle is pushed well up into the holder and tightened. If this does'nt work then I'm afraid it's mechanical. :-)

Try directing heat from a handheld hair dryer into the internal mechanics where you applied oil. If the old oil has solidified, it is probably preventing the parts from moving freely. Be sure to always use Fresh, good quality sewing machine oil (NO 3-in-1, WD-40, cooking oil, or old stinky oil from grandma's sewing basket). Also apply only 1-2 drops each spot. Frequent oiling should be around every 40 hours of sewing time, or at least every 3 months.

Here's a manual if you need one (oiling instructions on pg 74):
5050 Singer Sewing

..

The presser foot should be up when doing this with the needle in the high position.

the gear or part that holds the needle position in place may either
be getting jarred or is worn,,
try using a different threadThe needle thread breaks
1. the needle thread is not threaded properly
2. The needle thread tension is to tight
3. The needle is bent or blunt
4. The needle is incorrectly inserted
5. The needle thread & the bobbin thread are not set under the presser foot when starting to sew
6. the threads were not drawn to the rear after sewing
7. The thread is either to heavy or to fine for the needle

also try adjusting the top thread tension
as far as the bright spot, the display could be going out.

sometimes the repair person does not check the machine to
see if the machine is working correctly, because they would have
to charge more and some don't so you have to bring the machine
back more often and that makes them more money.

I don't think it's a major timing issue, so don't panic. Take a look at your selected stitch pattern selector and set for straight stitch, and set Tension at 3-4. Width: 4. Length: 4. Make sure presser foot Down when you rethread machine so the tesion disks open up to locate thread. Always hold thread taut when "feeling" for tension slot. Insert new needle. Needle goes all the way up into needle clamp as far as it can possibly go, FLAT side needle toward needle bar and more rounded side needle facing you. Leave 6" tail. Hold thread toward you as you turn hand wheel toward you so needle can make a loop with bobbin thread. Make sure bobbin thread isn't hanging down on or across bobbin! Make sure thread in bobbin has wound evenly - good quality thread ideal! Clean bobbin area and feed dogs for broken, loose threads and lint. Always use needles appropriate size for weight of fabric. I suggest walking away from machine, taking deep, cleansing breadth, humming a favorite tune, then doing above and see how it goes! Soon your machine will be humming happily along with you. Hope these suggestions help. Jimmy

You can download a manual from this link
http://www.singerco.com/uploads/download/664_14u34b,234b.pdf

Check page 16, changing the seam width is done by moving the cutting blade left or right and using only one needle. So if you want the narrowest seam, use the right needle only, remove the left one, and move the blade as far left as you can. Your manual says to turn machine off at the wall for safety, many overlockers will have a motor cutout when you open the front covers, but its good practice to turn off too. Then you put pressure against the upper moveable blade and swing it up out of the way and make adjustment to the lower fixed blade with a screwdriver in your kit (some overlockers it is a knob you move to move the blade position).

And reverse for a wide stitch, use left needle for 3 thread wide seam, and move the blade far right.

You can also use the 4 thread seam where you use both needles and trim up narrow but the seam will be heavier than a three thread.

Each time you make changes to the amount of fabric being trimmed, you may need to finess the upper and lower looper tensions to ensure the seam is tensioned enough to just meet on the cut edge of the fabric. This is the norm for overlockers, each fabric will behave a little differently so you need to test stitch and adjust a little. Your manual will explain this process too.

your machine threads from right to left. the needle flat spot faces left. big loopy things means that the upper part of the machine is not threaded properly. as far as the needle hitting the bobbin case, it sounds as if someone removed the hook (part that holds the case) and put it back on 180 degrees off.

How do I wet wind a 2 inchs long bobbin using varnish.

Thanks
Gholam

First switch off your machine and lower the needle. Try to pull your needle bar to the right and to the left. There should be a little bit of resistance but you should be able to do it. If it is tight your machine needs a service and from a qualified tecnician.

If you are able to pull it, then switch your machine on, and check if the machine initialize and the needle move to the left and stops in the centre. If not your step motor is faulty.

Hope this help