From February 2019, Want to know what $8 piece causes 85% of the problems that happen with your $25,000 embroidery machine? At ISS Long Beach 2019, we sat down with Bill Garvin of BG Tech, a Tampa-based embroidery technician who services 80 to 100 shops a month on the East Coast,  for a no-nonsense ShopTalk on bobbin cases, tension, and why your maintenance habits matter more than your equipment. The $8 Fix for Most Embroidery Problems.

Here’s the rundown, and why Bill’s bobbin gospel still applies today. The global industrial embroidery machine market is projected to grow from $1.52 billion in 2026 to $2.49 billion by 2035, driven by rising demand for customized apparel and corporate branding. As shops invest more capital in advanced equipment, basic maintenance habits become the difference between a profitable production day and an emergency service call.

The $8 Fix for Most Embroidery Problems

Bill kicked things off with a question that stumped the room: why are there tension knobs on your embroidery machine in the first place? Answer, specialty threads. Metallic, glass bead, different weights, different twists. However, for your standard polyester or rayon production runs, every tension knob on the machine should look identical. When they don’t, somebody’s been turning them, and that somebody is usually reacting to a problem the bobbin case caused.

Stop touching the knobs

Bill called the instinct to reach up and adjust tension knobs a “domino effect.” Instead, when something feels off, re-thread the needle first. Nine times out of ten the problem disappears, it was a wrap in the wrong slot or a held disc you couldn’t see. Above all, consistency beats textbook perfection. Tension that reads 20%-80% bobbin showthrough is fine; what matters is that every needle behaves the same way.

Maintain the bobbin case, not the knobs

The bobbin case is the one constant variable across all 15 needles. Therefore, if you maintain it, cleaning weekly, checking the spring, running the drop test (one to three inches of slack, no wrist shaking), you eliminate the root cause of most tension complaints. Over-tightening flattens the spring permanently, and once the “spring has sprung,” no adjustment fixes it. So always keep extras on hand. They cost eight bucks. There’s no excuse.

Oil the rotary hook. Twice a day.

Bill’s other big point: the rotary sewing hook hasn’t been redesigned since 1851. In fact, it’s the same mechanism your grandmother had in her treadle machine. Therefore, oil it twice every four operating hours, and blow out the rotary hook area daily. Most shops don’t, and most shops also call Bill.

Throw away your canned air

Finally, Bill made the math case for ditching canned air entirely. Three cans a week at $5 each adds up to $720 a year. Meanwhile, a 1.5 horsepower air compressor from Home Depot runs about $150 and lasts a decade. In other words, you’re saving roughly $7,000 over the life of one tool that does the job better.

Watch the full ShopTalk: The $8 Piece That Causes 85% of Embroidery Problems with Bill Garvin.