US 12,454,779 B2
Sewing machine
Takahito Igawa, Tokyo (JP); and Jun Mafune, Tokyo (JP)
Assigned to JANOME CORPORATION, Tokyo (JP)
Filed by JANOME Corporation, Tokyo (JP)
Filed on May 30, 2024, as Appl. No. 18/678,046.
Claims priority of application No. 2023-111993 (JP), filed on Jul. 7, 2023.
Prior Publication US 2025/0011989 A1, Jan. 9, 2025
Int. Cl. D05B 19/14 (2006.01); D05B 19/00 (2006.01)
CPC D05B 19/14 (2013.01) [D05B 19/006 (2013.01); D05D 2205/04 (2013.01); D05D 2205/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A sewing machine comprising:
a movement detection unit for sensing a movement of a material to be sewn to detect a movement amount of the material;
a drive motor for operating a needle;
a control unit for operating the drive motor; and
a storage unit,
wherein the storage unit stores a sewing speed and a sewing pitch,
wherein the control unit is configured to implement a first control mode and a second control mode,
wherein in the first control mode, when a detected value by the movement detection unit indicates a start of the movement of the material, the control unit keeps a stopped state of the drive motor until the detected value by the movement detection unit reaches a predetermined first threshold, and then operates the drive motor at the stored sewing speed when a detected value by the movement detection unit exceeds the first threshold,
wherein in the second control mode, when a detected value by the movement detection unit indicates a start of the movement of the material, the control unit keeps a stopped state of the drive motor until the detected value by the movement detection unit reaches a predetermined second threshold, and then operates the drive motor such that sewing is carried out at the stored sewing pitch on the basis of a detected value by the movement detection unit when the detected value by the movement detection unit exceeds the second threshold, and
wherein the first control mode and the second control mode for the control unit are switchable.