Print contracts below Bridge  

RE: Print contracts below Bridge

Posted by: @tim-m30

You can achieve even better bridges using supports and full contact.  I'll try to do a box with photo today.

Oh definitely. Just not always practical or desirable. I found this exercise interesting after finding a few situations where bridges were in areas that didn't lend themselves to support removal.

RE: Print contracts below Bridge

They screwed the royal pooch on that last forum image fix ... the current incarnation is proof the dev doing the work does NOT use the forum.

RE: Print contracts below Bridge

We no longer have ANY control over what size the preview images are.  Personally, I want smll tokens I can click on, not screen hogging misshapen troglodytes from the 1980s. 

On this test I did not control speed through the wall/floor transition, so the artifact is due to speed changes, not contraction.  I may go try one last print ... but simple supports and control of bridge angles is all that is needed to make the part easily printable. 

ps" well, seems that print was using speed controls, and was all done the same speed. So - that is the best I can do.

RE: Print contracts below Bridge

@bobstro

Thank you very much for pointing out moisture as a problem. As an absolute beginner I am printing in a "barn like" room with no insulation an I wonder why my print quality starts to suck.

Looking out for keeping PET dry I found some commercial as well as some DIY solutions. Has anybody a recommendation?

Cheers,

Volker

RE: Print contracts below Bridge

Posted by: @volker-jaenisch

[...] Looking out for keeping PET dry I found some commercial as well as some DIY solutions. Has anybody a recommendation?

I suggest stalking @guy-k2, in particular threads on drying filament such as this one. He's done some testing of how much moisture filament absorbs even after being bagged with a packet of desiccant. In short, bagging and even double-bagging helps, but does not prevent moisture absorption over a period of weeks. After reading his findings and reading about the NASA study on UFP emissions, I'm moving into the "toast before printing" school. I'll still bag filament, but for best results, drying anything more exotic than PLA in a dehydrator seems like the most reliable method.

If anybody finds an authoritative link for the NASA study, I'm still looking for one!

RE: Print contracts below Bridge

I noticed my orange was starting to spit once in a while; so did the shopping for a dryer solution. Turns out I can buy 20 spools of new filament for the cost of a dryer; add the cost of no space for a dryer, and?  I think I'll stick with desiccant bags.

RE: Print contracts below Bridge

Posted by: @tim-m30

I noticed my orange was starting to spit once in a while; so did the shopping for a dryer solution. Turns out I can buy 20 spools of new filament for the cost of a dryer; add the cost of no space for a dryer, and?  I think I'll stick with desiccant bags.

Desiccant won't dry 'em out though! Not sure where you're shopping to find a dryer at the $600 mark, but check out the inexpensive dehydrators.

RE: Print contracts below Bridge

I don't pay $30 a spool for filament: last price I found was $15 a spool - last price I purchased was $18 a spool (1kG). And I have been using desiccant and it seems to work well. But I use - enough - not those tiny bags that come with the spools. 

RE: Print contracts below Bridge

Not as useful for PLA, but for anyone using PETG like @volker-jaenish and certainly nylons, I'd say nearly essential. I've had a few spools of PLA that printed with significantly less fine stringing after drying out.