Prusament ASA - Surface quality problems - top and walls
Hi guys,
the parts are used for an espresso grinder and were printed in Prusament ASA Galaxy Black. I wanted to have a good top surface quality and enabled ironing.
Models are from Printables:
https://www.printables.com/model/163469-eureka-mignon-tray
https://www.printables.com/model/1469021-58mm-cup-holder-for-jaapps-smart-grind-by-weight-m
Cup holder needs to be sturdy/rigid therefore I used 0,15mm Balanced profile with adapted settings: 5 perimeters, 5 bottom layers and 30% gyroid infill, ironing enabeld with "all top surfaces", 30% flow rate and 0,1mm spacing and organic suppoers.
The tray was printed with 25% infill, 0,15mm balaned profile and ironing flow rate was at its default value.
Filament was dried some days ago and inside a drybox with some desiccant. Can it be a problem of moisture? Other possible improvements are welcome as I'm honestly a bit shocked about the bad quality.
Thanks!
Cheers,
Tom
Can it be a problem of moisture?
Probably not in this case - but always dry your filament.
The top surface look more like very slight warping - but I see no need for ironing this part - if it's a fraction rough buff it lightly with wet and dry abrasive paper used wet - and if the surface is left dull don't worry; as this is going to be used with food you will, of course, be coating the interior with food-safe lacquer in any case...
I see no need for 0.15m layers, this would be fine with 0.2mm or 0.25mm 'though the purely cosmetic badge on the front might suffer. I would print this with cubic infill.
Most of the horizontal defects suggest that you need to check your drive belt tensions, plenty of threads about it on these forums.
You also have the classic 'buldge' (sic) the misspelling by the original poster makes it easy to look up the main thread on the topic - the designer has made no attempt to avoid it and as you don't have the original CAD files there's not much you can do about it. It's caused by the thermal contraction of an internal layer pulling the walls inward during printing.
Cheerio,