1. Meet standing operation requirements, impr sewing efficiency.
2. 3 Pedal individually control high-speed sewing, tread trimming, and presser foot lifting.
3. If the connected control box or sewing head is not a standard sewing machine, but a specialized automatic machine, as it requires control over two action: sewing and presser foot lifting. The third pedal can be defined separately accoding to other additional function requirements.
