There are several reasons why filament falls off from bed.
At first, Is the gap between the nozzle and the bed too wide? If the distance between the extruder and the heating bed is too wide, adjust it by software.
Second, Temperature of the heat bed.
Try increasing the heat bed temperature. If the bed temperature is not high enough, the extruded filaments may cool too quickly and may not adhere to the floor. Usually the temperature of the heating bed is 60 degrees.
Third, Isn’t Output Speed too fast?
If the printing speed is too fast, try slowing down.
In conclusion, I can solve this problem. The cause is Print Speed!! I changed it from 60mm / s to 40mm / s and it was fixed.
If the problem is not resolved, check if the area to be bonded is too narrow, or use adhesive glue.
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