Sewing machine and method for protecting parameter data of sewing machine

Abstract

In the program protection device 8, a control device 7 sets the programmable sewing machine into a change prohibited mode in which a switch to a sewing program change mode capable of changing the sewing program and a parameter change mode capable of changing the sewing parameter is prohibited if a detector 51 detects that a treadle 4 is mounted on a buttonholing machine, and the detected signals are transmitted to the control device 7. On the contrary, if the detector 51 detects that the treadle 4 is not mounted, and the detected signals are transmitted to the control device 7, the control device 7 sets the programmable sewing machine into a change permitted mode in which a switch to the sewing program change mode and the parameter change mode is permitted.

Description

technical field [0001] The invention relates to a sewing machine capable of performing sewing action according to sewing parameters and a parameter data protection method in the sewing machine. Background technique [0002] Conventionally, there have been proposed embroidery sewing machines, buttonhole sewing machines, buttonhole sewing machines, etc. that can sew with various programs. Moreover, among these sewing machines, a program sewing machine having a configuration in which sewing parameters for stitch formation can be changed has also been proposed. For example, in the Japanese Patent Application Publication No. 2003-53076 proposed by the applicant of this case, it is disclosed that according to a sewing program composed of a plurality of sewing parameters (such as the number of stitches, sewing width, stitch pitch, etc.), the control device Buttonhole sewing machine that controls the stepping motor for feeding the processed cloth, the stepping motor for swinging th...

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Problems solved by technology

[0004] Again, such buttonhole sewing machines mostly allow sewing parameters to be changed in a state where they can be sewn, and if the sewing parameters are intended to be changed, but the sewing start operation is performed by mistake, there may be a problem. Sudden start of sewing can surprise the operator, waste of processed fabric, useless power consumption, etc.

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