One: color change timeout
1: Shake the color change bar, whether it can be easily shaken. If it is not heavy, then use the computer to change colors to see if it can change color normally. If you always change the color too much, adjust the dial inside the left panel of the color change box.
2: The color change does not move, check if the presser foot jumper is dropped. Or press the presser foot one by one to see if the slider is abnormal.
3: There is a setting in the computer. If the setting is not good, the occasional color change timeout will occur.

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