Small parts melted or blobby (overheating)
Small features and the tops of thin towers come out droopy, shiny or melted while the rest of the print is fine.
Also described as overheating, melted top, small details blobby, benchy chimney melted, tops of towers melted, droopy small parts
Try these in order
Most likely and quickest to check first. Change one thing at a time so you know what fixed it.
Layers too quick to cool
On a small layer, the next layer goes on while the last one is still soft.
- Set a minimum layer time of 8 to 15 seconds in the slicer.
- Print two or more copies, or add a sacrificial tower, so each layer has longer to cool.
Not enough cooling
- Run the part cooling fan at 100% for PLA, and check the fan and duct point at the nozzle.
Too hot
- Lower the temperature by 5 to 10 °C.