Sewing machine

Abstract

The present invention relates to a sewing machine which prevents position error and can restrain sewing efficiency reduction as possible. The sewing machine comprises the following components: a torque calculation part which calculates the torques of a first motor and a second motor; a torque storing part which stores the torque of each needle; a threshold torque storing part which stores an allowed torque threshold; a display part; a portraying control part which displays a relationship between the number of needles and the torque; an identification display control part which displays the needle falling positions with torque values that is larger than or equal with the allowed torque threshold and the needle falling positions with torque values smaller than the threshold with different display modes for identifying; an input part which inputs a new driving speed which is used for adjusting the driving speed of a spindle motor at the needle falling positions with torque values that islarger than or equal with the allowed torque threshold; and a sewing data substitution control part which substitutes the new driving speed input from the input part for the driving speed of the spindle motor corresponding with the needle falling positions with torque values that are larger than or equal with the allowed torque threshold.

Description

Technical field [0001] The invention relates to a sewing machine. Background technique [0002] Known is a sewing machine that forms a position pattern according to preset stitches, and automatically performs cloth feeding and needle drop. This kind of sewing machine has: a moving mechanism that moves the sewing material such as cloth in two directions of a plane that is substantially perpendicular to the up and down movement direction of the needle bar; and a control unit that is used to form presets based on stored The needle drop position data of the stitch (hereinafter referred to as sewing data) controls the drive of the spindle motor and the moving mechanism. The sewing machine controls the timing of the up and down movement of the needle bar and the moving mechanism in accordance with the sewing data. At the timing of the movement of the product, a stitch is formed (for example, refer to Patent Document 1). [0003] In the sewing industry using the above-mentioned sewing m...

AI Technical Summary

Problems solved by technology

Therefore, since the sewing of the portion where no positional error occurs is also decelerated, there is a problem that the sewing efficiency is lowered.

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