First of all, my excuses if this question has been asked before. I've been searching the net and this forum, but yet have to see anything that resembles my issue.
Here's the thing : I'm using/experimenting with a for-me-at-least new type of filament from a company called Devil Design. The sell an ABS+ variant which on itself gives nice results. That is, the results are nice until I start to use the "inside out/outside in" feature.
When I choose to print "inside out", tiny bubbles will appear on the printed surface. Changing speed (down to 20mm/sec), changing temperature (fro 220 to 250°C) doesn't make any difference at all. Tried on another printer : same issue. Tried a different model, testpiece, layer height, wall thickness. With fan, without fan. The printer resides in an enclosure, temperatures constant between 43 and 45 degrees.
Same issue.
What I see when selecting "inside out" are these kind of artifacts :
You can see the "bubbles" on the surface appearing out of the blue.
But printing this same materiial on the same printer, using the same settings, but selected "outside in" as order ?
No bubbles what so ever.
Yes, I know printing outside in is the solution in this case. Yes I know it's filament related, as other ABS+ filament from for example eSun doesn't show this effect. I'm just trying to understand exactly what is happening and why. The simple "it's bad filament, use better quality" doesn't really cut it : if the mere quality of the filament would really problematic, the print should look horrible no matter the print orientation.
My first thought would be "temperature/cooling/speed" related. But having no succes eliminating this issue other than stick to the "print outside in" print order .... it makes no sense to me.
Any thoughts, insights, hints other than "use a different filament or printer order" would be appriciated.
Kindest Regards,
