Inconsistent extrusion with ASA
I recently migrated from an lgx lite to an orbiter 2.5 and have been working on dialing in my asa profile using Inland ASA. I printed this bowl, where the lattice work looks mostly clean, but the top and bottoms are inconsistent. I printed this with an Extrusion Multiplier of .86 after running some calibration prints and ensuring my rotation distance was accurate (it was off by about 1%, which I compensated for). Not sure if this is an extrusion multiplier issue or a pressure advance issue, and I'd appreciate any insights people can give
9 Replies
looks like underextrusion, with maybe too low of temp. Do a temp tower then do a flow calibration. 0.86 seems a little low however
Currently starting fresh on the calibration front. I was printing that one at 280, so I certainly hope it's not a temp issue, but I'll do a temp tower either way. I'm pretty sure the blobbing starts after it switches from inner to external perimeters after a certain point in the print (I think when it stops printing the bottom of the bowl and is now only printing the sides)
I'm trying to unravel why it's doing it. I appreciate you guys giving bits of advice though
Im leaning more towards underextrusion, looking at that top layer in the bottom of the bowl
It would not be the first time something somewhat counterintuitive (blobbing being from underextrusion) has happened to a print of mine, so I'll definitely make sure to tune my extrusion modifier.
This assumes that I can get the temperature expansion calibration to work
Any updates?
I decided I want to figure out my belt tension first, my graphs were gross, but work was busy then my wife wanted to play Diablo 4 together. I will work on it more tomorrow. I appreciate you following up though. You've been a big help
I don't want to monopolize your time, but if you have any thoughts on the belt tension issue, I posted in fix my resonance here: https://discord.com/channels/582187371529764864/1329829951641485313 Your name came up a lot when I was searching the server for belt tension info.
Got the first layer dialed in enough. Going to work on EM calibration today.
Skipping working on the belt tension and resonance stuff because I think I'm going to have to do a teardown of some parts to fix that, as I am getting some heinous ringing (audio) when ocillating at like 40hz, so I think some stuff is loose
The external perimeter issue seems to me as incorrect pressure advance - not enough plastic is extruded as the toolhead accelerates. This results in the filament "dripping" instead of being laid in a line. One perimeter like that is enough to start chain reaction.
This can be caused by many more factors but the issue is "filament was not extruded in sufficient quantity when it was supposed to be"
Thanks, I actually just ran a pa calibration test earlier, waiting for my bed to cool off so I can pull it off and check it. I'll see if it needs adjusting. After I do that, I'm going to do the extrusion multiplier. I'm kinda just slowly making my way through Ellis's tuning guide.
But yea. I have a similar problem with LW-PLA now. I found no way to fix it except lower acceleration and speeds + "extra extrude after retraction" = 0.5 mm. That thing drips like crazy and if the "extra length" is not there then rhe filament is simply missing at the start of an extrusion.
That is not a thing with common filaments though.