I am experiencing thread breaks and skipped stitches. Do I need to time my machine?
Before timing the machine, consider that it could be something simpler. For example, the depth of the needle bar affects the relationship between the hook and the needle and can result in skipped stitches.
To determine if it is, in fact, timing, sew the word FOX in 1” satin stitch block letters on all needles. If only one needle has skipped, the problem is not hook timing. It could be needle bar timing, a bent needle or a problem in the thread path. Before you adjust timing:
1. Check all parts for burrs, nicks and other defects.
2. Check for improper top or bottom threading.
3. Check to see if the needle is bent or chipped. Does it roll on a flat surface? If not, it is not straight.
4. Check the hook assembly for burrs, running your finger over the hook front and back. A cotton swab will also work, as any nick or burr will dislodge some of the cotton. Buff or replace the hook assemble. Anywhere the thread touches should be smooth.
5. Check for incorrect take-up spring tensions, disc tension or bobbin tension.
6. Is the material flagging due to incorrect presser foot or hoop height? The hoops insert should ride on the sewing surface.
7. Check for excess oil in the hook.
8. Ensure the bobbins are wound tightly.
9. Check for lint in the thread path.
10. Inspect the thread break sensor to see if it’s dirty.
11. Inspect the housing of the circuit board for dust or lint.