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My brother just checked an earlier 3D print from a Flash Forge Pro: it was the knot, and it just started falling apart.

Should I set the extruder temperature hotter? That seems the logical thing to do which, would,maybe make it stick together better.

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What material, what extruder temp, what bed temp, print speed and slicer?

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as @wirlybird said, more information would be helpful.

Post a picture, which would help us alot in analyzing.

I would lean towards underextrusion, not temperature.

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Pla? Abs? Temp? Resolution? Print speed?

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The filament type is PLA. The extruder temperature was 120. The bed temp was 110. And the print speed was 90.

Basically; all the default settings. We do not change the setting much because of not knowing exactly how that would effect the print-out.

Roger at RDS2@Q

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PLA recommendation:

Extruder temp between 190-230.

Print speed 30-60mm/s standard until you get it dialed in.

Heated bed temp 55-60.

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Wow, thanks.

I hope this solves all the problems.

Blessings to you

Roger