What should I do if the needle distance of the computer single needle quilting machine is 4.0? (1) Check whether the needle is bent and whether the tip is passivated (if the tip is bent or broken,Should be replaced ).(2) Check whether the machine needle is installed correctly (if the machine needle is not installed correctly,Should be installed correctly ).(3) Check whether the sewing machine thread is correct (if the thread is incorrect,Should wear the machine line correctly ).(4) Check whether the pressure on the foot is too small (adjust the pressure on the foot ).(5) Check whether the machine needle is too thin (replace it with the machine needle of the first grade of the university, or harder ).(6) check whether the pressure foot is too high (adjust the pressure foot height ).(7) check whether the depth of the lower needle is too shallow (adjust the depth of the lower needle appropriately ).(8) check whether the pick line quantity is too much (adjust the pick line quantity ).Adjust the shuttle col

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More than a dozen computer sewing machines in our factory are now broken. now I want to find a professional maintenance factory for repair. I am worried about which one I don't know? Repairing sewing machines is generally best to find the Knitting Factory master is more appropriate,Ask,Young people can't repair this yet,They didn't like sewing and mending,Make clothes and trousers,Modern people go to buy clothes to wear,So it is more appropriate to find an old master!