A sewing machine includes an arm portion, a thread spool mounting portion, a bobbin winder, a first guide portion, a second guide portion, and a partition wall member. The arm portion is provided with a drive shaft extending in a first direction. The thread spool mounting portion includes a thread spool pin to be inserted through a through hole of a thread spool. The bobbin winder is provided further to one end side of the arm portion than the thread spool mounting portion. The first guide portion is provided further to another end side of the arm portion than the thread spool mounting portion. The second guide portion is provided further to another end side in the first direction of the arm portion than the first guide portion. The partition wall member is disposed between the thread spool pin and the first guide portion in a second direction.

A method for calibrating one or more optical sensors on a sewing machine, including collecting data of one or more features of one or more predefined regions associated with the sewing machine, processing the data through one or more neural networks, wherein the one or more neural networks detect and recognize the one or more features of the one or more predetermined regions from the data, calculating one or more accuracy indicators of the one or more features from the data as compared to one or more trained features from the one or more neural networks, comparing the value of the one or more accuracy indicators to one or more indicator thresholds and adjusting one or more parameters of one or more optical sensors based on the comparison between the one or more accuracy indicators and the one or more indicator thresholds.

A method for calibrating one or more optical sensors on a sewing machine, including collecting data of one or more features of one or more predefined regions associated with the sewing machine, processing the data through one or more neural networks, wherein the one or more neural networks detect and recognize the one or more features of the one or more predetermined regions from the data, calculating one or more accuracy indicators of the one or more features from the data as compared to one or more trained features from the one or more neural networks, comparing the value of the one or more accuracy indicators to one or more indicator thresholds and adjusting one or more parameters of one or more optical sensors based on the comparison between the one or more accuracy indicators and the one or more indicator thresholds.

A sewing machine includes a feed dog partially protruding out up and down from a throat plate to feed a workpiece, a sewing needle configured to perform stitch points on the workpiece by moving up and down, and a shuttle configured to capture an upper thread passed through the sewing needle below the throat plate to be entwined with a lower thread. The feed dog includes a top plate having teeth formed on an upper surface thereof, and a support portion to which a feed operation relative to the top plate is input. The top plate includes an insertion hole that the sewing needle penetrates up and down, and a pair of wall portions extending in an up-and-down direction respectively on one side and another side in a feed direction of the workpiece relative to the insertion hole on a lower surface side of the top plate.

A presser foot vertical drive device includes an upper shaft configured to vertically drive a needle, a presser foot drive cam fixed to the upper shaft, a presser foot urged downward over a needle plate, a cam follower configured to be vertically driven in contact with the presser foot drive cam, and a link configured to transmit the vertical drive of the cam follower to the presser foot. The presser foot drive cam includes a plurality of drive cams having cam surfaces for different presser foot vertical drive patterns. The cam follower includes a switching unit for selection of one drive cam from the presser foot drive cam.

A presser foot vertical drive device includes an upper shaft configured to vertically drive a needle, a presser foot drive cam fixed to the upper shaft, a presser foot urged downward over a needle plate, a cam follower configured to be vertically driven in contact with the presser foot drive cam, and a link configured to transmit the vertical drive of the cam follower to the presser foot. The presser foot drive cam includes a plurality of drive cams having cam surfaces for different presser foot vertical drive patterns. The cam follower includes a switching unit for selection of one drive cam from the presser foot drive cam.

A presser foot (1) for a sewing machine, having a shank (4) for fastening the presser foot (1) to a sewing machine, a needle opening (5) through which the sewing machine needle is able to be guided during sewing, and a presser foot sole (6) having an elongate depression (7) in the presser foot sole (6). The elongate depression (7) forms a guide wall which during sewing is configured to guide a filler material (8) to be sewn into the fabric (2) in the transport direction laterally beside the needle opening (5) and past the needle opening (5), and press said filler material against the fabric to be sewn, wherein the spatial extent of the elongate depression (7) is variably adjustable.

A presser foot (1) for a sewing machine, having a shank (4) for fastening the presser foot (1) to a sewing machine, a needle opening (5) through which the sewing machine needle is able to be guided during sewing, and a presser foot sole (6) having an elongate depression (7) in the presser foot sole (6). The elongate depression (7) forms a guide wall which during sewing is configured to guide a filler material (8) to be sewn into the fabric (2) in the transport direction laterally beside the needle opening (5) and past the needle opening (5), and press said filler material against the fabric to be sewn, wherein the spatial extent of the elongate depression (7) is variably adjustable.

A storage device for sewing machine presser feet is provided. The storage device includes a base member and a tower member rotatably coupled to the base member. The tower member is centered about a longitudinal axis and extends along the longitudinal axis. The tower member has an outer side surface with a first plurality of hangers disposed thereon. The first plurality of hangers include a first hanger. The first hanger has first and second extension arms and a tab member configured to hold a sewing machine presser feet thereon. The tab member of the first hanger is disposed between and above the first and second extension arms of the first hanger.

This sewing needle holding device (10) is provided with: a holder (24) which holds the base end side of a sewing needle (14) provided with, from the leading end side toward the base end side in the extension direction, a small diameter portion (16), an outer diameter varying portion (20a), and a large diameter portion (18); and a presser member (26) which is mounted to the holder (24). The holder (24) causes at least the small diameter portion (16) and the outer diameter varying portion (20a) of the sewing needle (14) to protrude from a holder leading-end surface (34). The presser member (26) has a counter portion (46) that faces the holder leading-end surface (34). The counter portion (46) has formed therein an insertion hole (50) through which the small diameter portion (16) can be inserted. At least a part of the insertion hole (50) is provided with a pressure-receiving surface (52) that comes into abutment with the outer diameter varying portion (20a).