Janome Corporation

Jun Mafune

Kentaro Akahane

Takahito Igawa

A sewing machine includes a sewing pitch setup unit configured to set up a given sewing pitch; a movement detection unit configured to detect a movement of a material to be sewn; a control unit configured to calculate a movement speed of the material on the basis of a movement amount of the material detected by the movement detection unit and to calculate a rotational rate for a sewing machine motor for operating a needle on the basis of the movement speed and the given sewing pitch; and an informing component configured to inform of magnitude of the rotational rate relative to a maximum rotational rate for the sewing machine motor.

Sewing machine

A sewing machine includes at least: a movement detection unit for detecting a movement amount of a material to be sewn; a drive motor for operating a needle; a control unit for operating the drive motor; and a storage unit. The storage unit stores a sewing speed and a sewing pitch. The control unit is configured to implement a first control mode and a second control mode. In the first control mode, the control unit operates the drive motor at the stored sewing speed when the detected value by the movement detection unit exceeds a predetermined first threshold. In the second control mode, the control unit operates the drive motor such that the sewing is carried out at the stored sewing pitch on the basis of the detected value when the detected value exceeds a predetermined second threshold. These first control mode and second control mode are switchable.

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Tokyo, Japan

Jun Mafune