The support is welded to the part, or pulling it off wrecks the underside.
It happens on any FDM printer. Setting names are Bambu Studio's: in Orca Slicer almost all have the same name, and PrusaSlicer or Cura usually have an equivalent.
Where do I start?
Two questions to sort out what to check. It's a guide, not a sure fix: every printer and every filament is different.
Check in this order
- The printerIf it printed fine yesterday and not today, it's almost never the profile. Check the plate, the nozzle and the room: printing at 15 °C is not the same as at 30 °C.
- The filamentA spool that has soaked up moisture gives strings, bubbles and brittle parts. Dry it before changing settings, and pick that filament's profile in the program.Filament pages
- The slicerOnly now, the settings below, in order. Change one thing, print a small test and compare. If you change three at once and it gets fixed, you won't know which one did it.Go to the settings
Check in this order
- The filamentA spool that has soaked up moisture gives strings, bubbles and brittle parts. Dry it before changing settings, and pick that filament's profile in the program.Filament pages
- The slicerOnly now, the settings below, in order. Change one thing, print a small test and compare. If you change three at once and it gets fixed, you won't know which one did it.Go to the settings
Check in this order
- The previewStep through the slicer preview layer by layer: that's where you spot missing supports and odd areas in this part.
- The slicerOnly now, the settings below, in order. Change one thing, print a small test and compare. If you change three at once and it gets fixed, you won't know which one did it.Go to the settings
In the slicer (in this order)
- Top Z distanceProcess › SupportIf it tears pieces off, go up to 0.25–0.30 mm. If the underside looks too rough, go down to 0.10 mm, knowing it will be harder to remove.
- Top interface layersProcess › SupportWith 2 or 3 dense layers, the part rests on something flat.
- Support/object XY distanceProcess › SupportIf the support scars the walls, move it away (0.5–0.8 mm).
- Support/raft interface filamentProcess › SupportWith an AMS, an interface in support filament (or PETG under a PLA part) comes off almost by itself.
Tried everything and it's still the same? Calibrate your filament with the 8 tests, or write to us with a photo.