Bad print surface
Hey, i have been printing some cases for work on my mk3, and for the most part it has been great. To begin with the surface of the print that was on the bed looked great, but for the last couple of prints they have been looking like on the picture here. The right print was a week ago, and the left was from today. It looks horrible. I have tried cleaning the bed with both acetone and isopropyl alcohol, and it still looks like this.
I am printing with Fiberlogy PLA, using prusa's presets in Slic3r PE.
As can bee seen it mostly just dosnt look good. But what is in the red rectangles is actual holes in the surface, and i have no clue how they suddently started to appear
Re: Bad print surface
I'm sure wiser ones than me will be able to sort you out, but the first thing I would do is see if your z offset has changed.
Re: Bad print surface
The left side looks like something has been smeared on the bed unevenly giving the dull sweeping effect, and it also looks like your live 'Z' adjustment value could be a little close to the bed...
on the Mk2 the Pinda was temperature sensitive and it was best to allways start a print with the extruder about 60 to 100 mm above the bed... I wonder if this might not have been completely resolved in the mk3
I would be tempted to reclean the bed with Acetone,
make sure that you get an even coverage, and use a dry tissue to polish the bed off to ensure it is clean,
then start a new print, with the extruder nozzle some 60mm above the build plate, watching the first layer like a hawk...
if it starts to ripple, immediately reduce the negative size of the Live Z value
until it's nice and smooth.
if the initial layer is unsatisfactory at first, consider removing it once you have the live Z dialled in,and restart the print with the extruder 60mm above the build plate
there shouldn't be any need to clean the build plate after every print, as long as you don't get finger grease, dust or other contaminents on the surface
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
Re: Bad print surface
Well i have wiped the plate with acetone on paper towel, and not touched the plate afterwards, so i assume it is clean.
And what you mean is that the ripple in the red boxes is because the nozzle is too CLOSE to the build plate? I assumed it was because it might be too far away from the plate so it had problems sticking.
Re: Bad print surface
I had the same surface. Stop the use of acetone on PEI! [/ b]
Take your sheet and clean it thoroughly with dishwashing detergent. Once it's really clean, the alcohol will work again.
Re: Bad print surface
After trying different solutions for cleaning the PEI surface (buildtak) and killing one sheet with acetone I found out that Methyl alcohol works the best (for me, at least).
Re: Bad print surface
After trying different solutions for cleaning the PEI surface (buildtak) and killing one sheet with acetone I found out that Methyl alcohol works the best (for me, at least).
Methyl is better than IPA? What concentrations were you using?
When someone asks you if you're a god, you say, "YES!"
Re: Bad print surface
I had the same surface. Stop the use of acetone on PEI! [/ b]
Take your sheet and clean it thoroughly with dishwashing detergent. Once it's really clean, the alcohol will work again.
Well this was what fixed it for me now. It removed both the bad looking surface and the ripple that came in the surface. I just printed a new case like the one on the picture, and the surface is amazing once more 😁
Re: Bad print surface
After trying different solutions for cleaning the PEI surface (buildtak) and killing one sheet with acetone I found out that Methyl alcohol works the best (for me, at least).
Methyl is better than IPA? What concentrations were you using?
Not sure for mythil, since it's not mentioned on the bottle. Nothing fancy, bought at hw store, cleaning aisle.
For IPA i tried some medical ipa-soaked wipes, 97%. Have better results with Methyl, wlie its cheaper and easier to obtain here in Belgium.
Re: Bad print surface
After trying different solutions for cleaning the PEI surface (buildtak) and killing one sheet with acetone I found out that Methyl alcohol works the best (for me, at least).
Methyl is better than IPA? What concentrations were you using?
Not sure for mythil, since it's not mentioned on the bottle. Nothing fancy, bought at hw store, cleaning aisle.
For IPA i tried some medical ipa-soaked wipes, 97%. Have better results with Methyl, wlie its cheaper and easier to obtain here in Belgium.
If you're using methanol please also, under any circumstances, wear gloves. Methanol is able to pass the skin-barrier and thus is deposited directly into the bloodstream. Its vapours are also not very healthy to inhale. Thus you should use it only under a fume hood or outside.
Isopropanol / Isopropyl alcohol / Propan-2-ol is a much safer choice.
I'm also not sure why you'd need soaked wipes. The 70% solutions work just as well and you simply pour a bit on fluff-free dry wipes. 97% is what you'd use in a chemical laboratory for preparations - that's a degree of purity you don't really need (and which makes it really expensive). 200 ml of 70% Isopropanol cost me about 2€ at our local drug store. Please remember, you don't need to drench the bed in the solvent.