Hi,
New to 3d printing, received A1 combo 20 days ago and printing so far without any problems. Bambu PLA Basic. Full calibrations as well as flow control calibration are re-done (also today).
The last days I’m having issues with models that have overhangs. Stringing appears on those parts. It’s like filament is melting down right after the overhang or the bridge in being printed. Fan was at 100%.
Printing a benchy today from inside the printer’s panel with default settings also showed (probably more) problems.
I’d like first to identify what the problem is (bad/wet filament maybe?) and then ask for recommendations.
Some pictures have benchy initially printed fine along with the one from today.
Also did a temperature test.
Thanks
I did some test calibration prints today to identify at least how to call this problems. Seems to me that I have sag in bridges. Monitoring the printing of bridge layer, the line comes out with a sag (bend down). After a second, due to cooling, it stretches to a straight line (when it works or almost works). Maybe the fan is pushing the line down?
Maybe the flow is not correct? I’ve tried various tests and can’t get to figure it out yet…
1h benchy
XYZ cube
Retraction test
Overhang test
Calibration test
Bridge flow rate
1.0, 0.95, 0.90, 0.85
Bridge flow rate
1.0, 1.05, 1.10, 1.15 and bridge fan at 85%
Some bridge test. Although looking at slicer on this model it does not do any bridge so it does not follow bridge settings for this. This come out almost nice. Didn’t expect it.
