How Singer, Brother, Janome, Bernina and Juki differ in stitch quality, parts supply and service cost, and how to compare them.
Juki fault checks in order: stitch quality, tension balance, hook timing, and the service points that differ from home machines.
Check the numbered feet, needle plate, bobbin case and thread path at the bench first; most of these faults start there and not in the electronics.
What to check on a Janome before replacing parts: skipped stitches, thread nests and timing drift, and which parts cross over.
Identify the branch before anything else: mechanical home, computerized, embroidery or serger. Each fails in a different place and order.
Singer fault checks for skipped stitches, bobbin tangles and tension drift, plus which vintage and modern parts stay compatible.
What a badge really changes is parts supply, the accessory system you are locked into, oil needs and how much fault the electronics will report.