From cindi2260,

The website replaced the word " s l i t " in my previous message with stars. What I meant was:

The thread on the bobbin should always run from the top of the bobbin down to the left, in the same direction as the s l i t in the bobbin case (to the right of the little screw).

The sequence of setting up of thread from spool to needle is not complied to actual setting is one factor to be consider it affect the sequence timing of sewing.Particularly some machine are common in starting up threading.fig. shown a basic flow of thread on red color.It maybe a helpful one

In addition to this the set up of thread to bobbins winder is also need in right place the thread should be in clockwise rotation when coming out to bobbins casing as shown in fig. as you can see when thread was pulled out from bobbins winder is moving counter clockwise.If you try to sew, try cotton fabric and set dial to # 3 to 4 and stitch set range to 8 up to 12 depend on layers and thickness,After setting try to sew manually ,turn hand wheel by your hand first,let upper tension catch the lower bobbins tension and arranged thread and insert fabric use hand turning hand wheel several time until stich appear on fabric observed loop thread on lower bobbins on fabric.if accumulation of loop thread on lower adjust upper tension also dial tension gradually until it has a smooth stich appear.