Can anyone put a finger on why this is happening? The parts clean up just fine but the supports came out like this. Is this possibility because of the type of support? This seems like something that could easily be pointed out by someone that knows what they are doing. Lol.
I’d try faster transits and a little more retraction.
Basically this is the result of the retraction not causing the internal pressure of the hot end to be completely released. Set your slicer to travel a little bit longer over the printed part after retracting and then faster travel across the gap should also help.
@Jim_Christiansen I’m already extracting 4mm at 25mm/s. Should I do more? I seems like 4 is already kinda high.
@ThantiK do you happen to know what those settings are called? I’m using Cura.
It depends on your machine. I’m using a long Bowden tube and retract 6 mm. I’m using rather book numbers in my Marlin firmware for retract Accel.
The print quality at 5mm was like your pictures. 6 mm is so much cleaner
@Jim_Christiansen ok, I’ll try upping it to 5mm and then maybe 6 and see what happens.
Just a warning, if you retract too much into the cold zone, you risk clogging your nozzle or even the Hotend itself.
I managed to destroy a hexagon full metal Hotend due to trying to retract too much…
I was retracting 7mm with PETG.
I was working on my retraction and oozing issues so I just noticed yours. This is what I have in my cura profile now:
retraction_speed = 100
retraction_amount = 3
retraction_dual_amount = 20
retraction_min_travel = 1.5
retraction_combing = None
retraction_minimal_extrusion = 0.05
retraction_hop = 1.5
support_type = Grid
support_angle = 45
travel_speed = 350
These are my other circumstances:
print speed is 80
bowden tube
non-geared
Rostock Max v1
Be warned that the others may say my settings are terrible. Some of the settings may be terribly unsuitable for your printer even if they are not terrible. Folk, please feel free to tell us if these settings would be bad for him if you know well enough. Otherwise, he may end up using them when he should not.
@NathanielStenzel well I changed the retraction speed and distance just a little and my last print turned out great! The part even had some big gaps where retraction was necessary and there were very few, very thing strings across the part. I was quite surprised. No jams either. I might have found the sweet spot for this setting.
@Kevin_Danger_Powers good. I am glad to help. To be honest, I am still tuning in my settings…again. I had them figured out once, but I lost all of my settings.
@NathanielStenzel my biggest issue right now seems to be knowing what settings to use for different prints. I’m finding that there isn’t like a group of settings that just works for everything. Depending on what I’m printing I may change layer heights, speeds and other things like the orientation of the part and support patterns. There are just so many settings that it takes a while to figure it all out.
@Kevin_Danger_Powers yeah. I hope to manage to get all of my needs in just 3 slicer profiles. One for speed, one for detail and and average one. Else than that, I will be trying to just modify settings from the profile.