| 摘要 |
In an electronically controlled sewing machine having an arm shaft position sensor signalling release of feed data and of needle position data at opposite extremes of endwise reciprocation of a needle bar, depression of a needle up or needle down position button will implement a slow speed drive circuit, and a fast stop brake circuit will stop the needle bar immediately upon the occurrence of a signal from the arm shaft position sensor corresponding to the selected needle position button.
|
