WR561-1 Energy saving machine

1.motor running was controlled by software,adjustment speed is much fast than brush motor.

2.energy efficiency advanced 15% than brush motor.

3.that on the shortage of voltage makes the controller more reliable,it can realize non-polar control of sewing speed,thus the sewing machine can fulfill all kinds of auto-sewing tasks. It can save time, energy,high-efficiency and energy saving control effect.