As with most questions, it's not as easy as just spouting out an answer, so here are some guidelines on choosing the best Zigzag machine for you.
Zigzag machines (as opposed to straight stitch machines) come in three styles.
We'll name these categories by their bobbin designations: Class 15, Class 15 Front Load, and Drop-In.
In 27 years I have never had to reset the timing on a Class 15 machine.
In addition, the entire bobbin case moves with the needle as it zigzags, making sure each stitch is consistent.
Drop-In sewing machines are the most commonly made today.
Quick and easy to load, the bobbin is placed horizontal in the bobbin case.
Just like Class 15 Front Loads however, the bobbin case remains static during zigzaging.
This may result in skipped stitches where only one side --Left or Right -- is actually sewn.
- Class 15s are the most precise, stitch-wise, but are also the most difficult to load.
- Class 15 Front Loads and Drop-Ins easier to load, but will also occasionally lose timing during a project.