Old brother xl 3010 sewing machine

SOURCE: how do i thread the bobbin

I have a new sewwing machine Eurp-pro Shark automatic but I don't know to thread the bobbin

SOURCE: Brother Industrial Machine Tension

This is an answer to another person with a similar complaint. Try the suggestion below, it may fix the problem.

From your description it appears that you have tried tension settings on the upper tension control adjustment knob without success.
Check that the bobin tension is adjusted correctly by taking out the bobin complete with the spool.
Pull the cotton thread and it should be a smooth light pressure if the tension is correct. If it is tight to pull or pulls freely then adjust the tension screw which is found on the outside of the bobbin. The screw is very small and requires a minature size screwdriver. The adjustment will only be a slight turn of the screw one way or the other to obtain the correct tension(depending if it was loose or tight).
Once this is set reinstall the bobin and tread up the machine, hopefully with the upper tension set at approx."2" the machine will sew correctly.

SOURCE: Thread tension for Brother XL 2230.

If you have pattern dials set correctly then I might guess that one or more sets may have been missed when the thread was being set up in the machine. most of these models show either arrows or numbers for each or way the thread needs to be routed.

SOURCE: Thread Breaking On Brother Sewing Machine

if thread is good quality you may have a sharp groove in your needle plate hole from needle breakage. if so, polish with emery tape.

scott

SOURCE: sewing machine XL 5500 settings

Your bobbin is probably too loose. When you set a new bobbin, stop every now and then and try with your fingers nail if it's nice and tight enough. Not extremely tight, but tight, not loose and moves easily when you set your finger between the threads.

With most fabrics (99%) the plate is fine at the the top position, just with very thick and "fragile" (satins etc) you might need to adjust it.

Settings: Tightest tension for the thinnest materials, more loose for the thicker ones, better have a test piece, it rarely goes under 5 anyway.