SPEEDWAY AI4. Sewing machine with electronic tension and thread trimmer

Sewing Machines

SPEEDWAY® AI4 – Material Recognition Direct Drive Lockstitch with Auto Tension & Trimmer – Complete Setup, Table & Stand Included

Stitch: Lockstitch
Motor: Servo
Needle: Single

Specifications

Stitch type: Lockstitch
Feed: Drop Feed
Construction: Flatbed
Features: Thread Trimmer, Automatic Foot Lifter, Automatic Reverse, Needle Positioner, Automatic Lubrication, Full Function
Best for: Lightweight Apparel, Denim / Jeans, Activewear / Stretch

AI material-recognition lockstitch — the machine senses fabric weight and adjusts tension automatically. The flagship single-needle for shops that switch fabrics constantly and don't want operators re-tuning between every job.

Who runs this

Contract apparel shops that mix fabric weights through the day — cotton in the morning, denim in the afternoon, performance fabric for a specialty run. Operator setup time on tension changes is the cost the AI4 eliminates.

Sample rooms and prototyping shops where every job is a different fabric. Tension tuning that used to take 5 minutes per fabric change becomes zero — the machine handles it.

Why AI tension matters

Auto-detect fabric weight. Sensors read the material as it feeds and adjust top + bobbin tension. Lightweight cotton to heavy denim — no operator recalibration.
Auto thread trim + auto presser foot lift. Discrete-cycle production speed without operator intervention between cycles.
Direct drive, fast pivot, fingertip-slow. Production-grade SPM on the high end; precise low-speed control for corner pivots.

Application examples

Mixed apparel run

Apparel shop running 4 different fabric weights in a single shift. AI tension means the same operator handles all four without setup time between jobs.

Sample room

Prototype lab making one-off samples for client review. Each sample is a different spec; tension tuning is the dominant cost the AI4 eliminates.

Repair shop

Multi-piece-per-day alterations and repairs across cotton, denim, wool, and performance fabric. Different tension needed for every piece — auto-tension makes the machine truly walk-up.