I have a new issue with bridging that I cant seem to solve. The items shown are only 100mm in length and approx 8mm wide. The photo below shows three prints - the good one was done quite a while back (date unknown), the other two have been done in the last couple of days. The bridge although only approx 6mm is sagging, it seems as though it is not attaching to the walls properly. I have stripped and cleaned the extruder, put in a new (0.6mm) Bambu nozzle. The filament is Bambu PLA basic - new roll opened yesterday. I have tried reducing the Bridge Flow (only to 0.9). The part cooling fan is working.
Generally in print these aligned with the X axis as for some reason I get a better top surface finish.
Any help would be appreciated.
Have you check the preview tab for the bridge layer to see which direction the overhangs are printed?
It entirely possible the slicer is printing them lengthwise.
Nowadays, new rolls tend to have quite a bit of moisture in them. So as a first remedy, please dry this thoroughly.
Also, bridging requires rapid cool down. That depends as much on cooling as it does on prior heat input. A .6 nozzle will add much more heat per line than a .4 nozzle and can therefore be expected to perform much worse in bridging.
It seems like you print the bridge without knowing the bottom surface pattern of the bridge. Knowing how it lays down filament would greatly improve your print in cases.
For me, I just flip your part over and print without worrying bridge or overhang.
I don’t understand why people try to defy the physic of gravity with those torturous bridge test like this
The only thing come in to my mind is just for showing off for doing that kind of bridge
I do understand some geniuses use bridge for special effect, but that is just some extreme cases, like this
Good points - thank you.
I’ve changed the nozzle back to 0.4 and tried printing with ABS - unfortunately same result
ABS is more challenging than PLA. Try it with dry PLA first.