1 Topic by Gimpdiggity

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Topic: DaVinci Jr Having Some Delaminating Issues, and a Question About PLA

Hi everyone.

I've been printing with my DaVinci Jr for the last 5 weeks pretty much non-stop.  I've logged over 250 hours on the printer with very few failed prints.  Most of my things have been smaller parts and trinkets, but I've put a few larger items in there without any issues.

However, the last few days I've been running into some delaminating problems on some larger items. 

In particular, I'm trying to print a Baymax from Big Hero 6 that is split into two parts.  The first time I did the bottom it printed fine almost all the way to the top (which is actually the bottom of his feet due to the way the file's split) and up near the top of the print it did SOMETHING strange...it didn't really seem like delaminating because it was exactly the same height on both legs, and went wonky, then normal, then wonky, then finished normal.  I ended up running the file through NetFabb and gave it another go, and it printed really well. 

I'm now trying to print the top half of Baymax, though, and I'm on my third try.  The first print delaminated down near the bed...probably about 1/2" up from the bed.  The second one delaminated up near the top, probably about 1/2" below his head.  These ones were definitely delamination, they didn't look like the same issue that I had with the bottom half the first time. 

Anyway...I have a couple of questions regarding this. 

Here in Michigan the last few days have been very warm compared to how cold it had been...like, from in the 20s and 30s to 70 on Tuesday.  In my house, that actually means it's COLDER in the room I print in, because the furnace hasn't been running at all.  It's noticeably cooler in there than it has been over the winter, because in the winter my furnace has one of those constant velocity fans so it's constantly pumping the warm air around the house...but when it gets this warm outside, it doesn't end up really pumping any heat, so it tends to stay cold in that room. 

So, is it possible that it's just gotten cool enough in the room that it's causing issues with the layer adhesion???  I'm currently trying the print a third time with a space heater in the room pointing into a corner so it just fills the whole room with warmth instead of pointing it directly at the printer. 

Next, the PLA that I've been printing with seems to LOOK a bit different than the other PLA I've printed with.  I've only printed with black...and the other 800m or so worth of filament has all had a shiny or glossy look to it...however, this current roll is very "matte" looking and isn't shiny at all.  Would this be just PLA sourced from different suppliers, or is it possible that there is something wrong with this current roll? 

Thank you for your input with this.

2 Reply by scobo

  • scobo
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Re: DaVinci Jr Having Some Delaminating Issues, and a Question About PLA

You really shouldn't be having delamination issues with PLA. ABS yes, PLA no.
I'd try another spool with the same print to see if it's a problem with this spool you're using.

Davinci 1.0 with repetier firmware & E3D V6 Lite
Anycubic Photon DLP printer, Einscan-S 3D scanner
Simplify3d, 123D Design, Meshmixer
http://www.thingiverse.com/scobo/designs

3 Reply by Gimpdiggity (edited by Gimpdiggity 2016-03-10 08:54:53)

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Re: DaVinci Jr Having Some Delaminating Issues, and a Question About PLA

scobo wrote:

You really shouldn't be having delamination issues with PLA. ABS yes, PLA no.
I'd try another spool with the same print to see if it's a problem with this spool you're using.


Okay, thanks.

I'm currently trying to print something that I know printed fine just the other day...the only problem is, I'm not 100% sure if I printed it with THIS spool or with the spool that I used up last week. 

I was down with the printer doing something while it was printing this Baymax again, and it was going along just fine, then all of the sudden it started having some clicking from the stepper.  When I looked over at it, it was no longer doing the infill the "correct" way, which is the interior hexagons on the part...it was just kind of lazily slopping the plastic down in a wavy line. 

I canceled the print...and upon further inspection, ALL of the Baymax tops have a layer that looks "off" in that exact same spot on the print...so I'm wondering if maybe it's a file issue or a slicing issue...each time I've printed it I've loaded it again...so I wouldn't think it's just a random error that's happening in the same spot. 

If I can get the item I know has printed well before to print, then I think I may just have a project that for whatever reason the DaVinci isn't going to work with...to be honest, it won't be the first one I've found!!!


***EDIT***

When I open this file in NetFabb, it's telling me that it has an error, but I can't seem to find what the error is.  I downloaded the file to a different computer...I believe that on my main computer, I did NOT see Netfabb telling me that there was a problem. 

I'm hoping that my current print just turns out, and I can write this off as something that just won't work for me.  I've printed a TON of stuff with this printer with no issues...so I don't think it's the printer itself.  Maybe it's the filament??  But I've printed several other (albeit way smaller things) with this roll of filament with no issues at all.