Question 1

Why won't my 3D print stick to the bed?

Accepted Answer

The nozzle is usually too far from the bed or the surface is dirty. Re-level, set a slightly negative Z-offset, clean the plate with soap or isopropyl alcohol, slow the first layer and add a brim.

Question 2

How do I stop stringing on my 3D prints?

Accepted Answer

Increase retraction distance and speed, lower the nozzle temperature 5-10C, dry wet filament, and raise travel speed so the nozzle crosses gaps before it can ooze.

Question 3

Why are the corners of my print warping and lifting?

Accepted Answer

The bed is too cool or there is a draft. Raise bed temperature, shield the printer, add a brim or raft, ease off early cooling, and use a lower-shrink material like PLA or PETG on an open printer.

Question 4

What causes layer shifting?

Accepted Answer

Printing too fast, loose belts, or the nozzle hitting the print. Lower speed and acceleration, tighten the X/Y belts, and make sure nothing is colliding with the head.

Question 5

Why is my print weak or splitting between layers?

Accepted Answer

Usually the nozzle temperature is too low or cooling is too strong. Raise nozzle temp, reduce the part-cooling fan for ABS/ASA/PC/Nylon, dry the filament, and keep layer height at or below 75% of nozzle diameter.

Question 6

Why won't my resin print stick to the build plate?

Accepted Answer

The plate is not level or the bottom-layer cure is too short. Re-level to the LCD, increase bottom exposure and bottom layer count, clean the plate for grip, and add a raft.

Question 7

Why is my resin print sticky after curing?

Accepted Answer

It is under-washed or under-cured. Wash longer in fresh isopropyl (or water for washable resin), then post-cure fully under UV, rotating for even exposure.

Question 8

How do I fix under-extrusion?

Accepted Answer

Clear a partial clog with a cold pull, raise nozzle temperature or slow down, check the extruder gear tension, and verify flow and 1.75 mm filament diameter.