Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
I am trying to print a very easy to print model - no overhangs, no complex contours, on my Core One.
Sliced with PrusaSlicer 2.9.5, 0.25 mm speed profile, gyroid infill, 3 contours. Prints great in Galaxy Black. Bed adhesion is not great but it sticks until the print is done.
Same print in Galaxy Red: First layer works fine. From the second layer onwards when the print speeed picks up, the nozzle starts to tear already printed material from the previous extrusion line. Not always, but enough to make me stop the print.
Now I understand that not every PLA is the same, and this rather transparent red material vs. the matte black Galaxy PLA is probably a very different beast.
But I am unsure how to proceed. Should I reduce speed (already tried balanced, did have a positive effect but not much)? Higher temp, lower temp? Different extrusion multiplier? Currently printing all layers at 230°C and 60° bed temp (stock setting for "Prusa PLA").
RE: Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
Prusa PLA (old) vs Prusament PLA (new), try the new profile first.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
Also try to to dry the red filament spool.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
Running the prusament profile already. Currently attempting a print with Structural (slower) and the first layer set to 0.25 mm instead of 0.2 mm. Also set the extrusion multiplier down to 0.95 and that seems to take a lot of the excess material away.
RE: Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
OK now the overextrusion issue is solved, the whole thing is warping like hell and pulling off the print bed. What can I tweak to improve that?
This reads like damp filament - look up threads here about drying. A brim may help adhesion if the problem persists.
Cheerio,
RE: Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
Not sure if it is damp, that roll has basically lived in my filament dryer for the last two days. What else except a brim can I do? Less infill, more infill? Higher bed temp?
RE: Issues with PLA Galaxy Red vs. Galaxy Black, looking for tweaks
if you have a humid environment and too low temperature you can dry it forever and not dry it at all.
See my GitHub and printables.com for some 3d stuff that you may like.
One problem with identifying dampness in galaxy filaments is that the typical steam-bubble pits that look like speckles in a photo are easily confused with the mica speckles in the filament ...
Check for yourself, feel the print; are there mini pits scattered over the surface? If so, check your dryer is working correctly, some heat the filament but fail to exchange the hot, moist air for dry.
Also, check you really are using the filament you think you are - one horribly easy fail, especially if you keep a lot of filaments, is to pick up a spool of the correct colour without checking that it's the correct polymer and attempt to print, for example, PETG with a PLA preset.
Please confirm: You are using a nextruder nozzle and not a nextruder E3D adapter with a separate nozzle screwed in?
The pictured print hasn't got as far as infill so no changes are indicated.
For adhesion the usual bed cleanliness advice applies.
Try increasing the nozzle temperature by 5° - and slowing the print is a good idea.
Cheerio,