At the moment I am out of my house and I will provide more detailed information once I arrive to my house (if needed)
I am trying to print an engraving with ASA Bambu. I have to print it vertically in order to have a good resolution in the engraving.
Details:
I am using the High Quality preset (low printing speeds)
0.4mm Extruder
I have done all the calibrations in the printer.
I use a 15mm brim in order to avoid warping
I have preheated the printer 30 minutes before the printing in order to avoid warping
All fans off (except the part fan which is between 10-30%)
Extruder is 255 ÂşC and Bed is 100 ÂşC
This last print has failed 1 hour before finishing. In the last 2 days I got 2 clogs also trying to print this same part. I dont understad why it is failing at this point. It is a vertical engraving, no overhangs.
Can anyone help me? I like the ASA properties, but it is being a nighmare to print it.
I think it is heat creep. The filament has been dryed at 65 degres for 10 hours. When I have removed the hot end for fixing the clog, the plastic inside did not have any obstruction. As additional data, all the prints are failing in the same point. It is a 6 hours print and they are failing 1 hour before ending. Probably since the part is streching in the top, it may be getting heat creep? How can i solve it in this case?
If it’s heat creep one of the caveman ways of fixing that is to just run faster, if you can. As long as your heatbrake fan is working, If you feed faster than entropy can push heat up the spaghetti noodle, you can’t prematurely soften. When you say it’s running slow - on the slicer preview screen, select flow, and inspect around one of the layers that it begins to fail at. Whats the flow, in mm3/s? If you’re under 3 or 4, it might be worth speeding up. Is it significantly different from the rest of the layers?
Heat creep usually will cause the filament to mushroom between the extruder gears and the nozzle and the filament will be stuck where you cant move the filament in or out.
that is the part where you should investigate a little further for the root cause of the issue. Check the preview in Bambu Studio and check what changes are happening at that layer height. Go through the different color themes in the slicing results and look for differences at that height especially for flow, layer time and speed.
If you have a very low flow due to your small layer height then try dropping the nozzle temperature or increase the speed a bit to avoid that the material “burns” inside the nozzle which may cause partial clogs.
