When sewing I can pull the tread out by hand doesn't matter is I put the tension on 1 2 or 3

https://www.youtube.com/watch?v=ecihrNdkACU

https://www.google.com/search?client=firefox-b-d&q=empisal+270d+hand+wheel+is+locked&spell=1&sa=X&ved=2ahUKEwjjmLuJ45_pAhXTVBUIHZSnAA4QBSgAegQIDRAn&biw=1269&bih=505

Could be fabric not feeding evenly, heavy fabric with weak needle, erratic top thread tension (top thread snagging).

Here's how I test tension.

Needle up, presser foot up, and tension selector at 4. I make a slow steady long pull of top thread (zero tension w/ foot up). Thread should glide smoothly and evenly through the needle eye, with little hesitation, snagging or uneven feeding from the spool. Lower the foot down, make another slow steady pull of top thread. Again the thread should advance smoothly and evenly through the needle at the set tension level 4 (foot down). Note difference in tension at set tension 4 (foot down) and no tenion (foot up).

If I find no problem with top thread feed/tension, I then perform a like test of bobbin thread. Make a slow steady pull on bobbin thread. Again, thread should advance from the bobbin smoothly, evenly, and have tension somewhat like the top thread at level 4 (foot down).

The Class 15 (A Style) Bobbin: The Class 15 is about the size of an American nickel. Its diameter measures approximately 20.3 mm and has a width of approximately 11.7 mm. Empisal Dress Maker 270D Instruction Manual

If it is a mechanical machine, you can apply 1-2 drops of good quality sewing machine oil or liquid Tri-Flow Synthetic Lube to any place where metal rubs against metal. AVOID belts, plastic gears, etc. Be sure to also move stitch selector lever and dial mechanisms.

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this indicates that the needle tension is not tight enough

Usually, if the thread is bunching or looping under the fabric, the upper tension is too loose.. But if the bobbin thread is showing on the top of the fabric, the upper tension is too tight.

The tension is correct when both the upper and lower threads meet in the middle of the fabric.

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What you have is frequently referred to as thread-nesting or bird-nesting of the thread. Your upper thread tension is too loose. Tighten the upper tension (righty-tighty), test stitch, tighten, etc. until the upper thread and bobbin thread meet in the middle of your fabric.

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here is a link for a manual for the machine

http://get-what-you-need.com/catalog/d/empisal-dressmaker-270d-free-manual.html

If the thread is pulling through the top of the fabric slacken off the top tension to about 4 and tighten the bobbin tension slightly by turning the screw on the bobbin case about a quarter of a turn clockwise and test.

If your machine bunch up the tread, it has nothing to do with timing. In 90% of the cases the problem lies with the top thread. Check your tension disks for any fluff or thread. Also check that you thread the machine correctly. The best way to check the tension is to thread the machine normally with the presser foot up. when you get to the stage of the threading the needle, first lower the presser the presser foot and check the tension by pulling the thread slowly with your right hand and adjust the tension with your left hand. On zero you should be able to pull freely and on 5 there should be enough resistance. If this is the case your machine should sew perfectly.
Hope this help