tawdry island
Hi. Just ran the kitchen sink with required settings. Polymaker petg, dry. .6mm nozzle.
Looks mostly good except these couple issues.
Pock marks on single wall cube surface. Visible with flash on.
Pinholes in single layer overhang. A few sections of some layers are matte rather than shiny.
Gap on the seam of the base, other seams looked good.
Thoughts on what to tune?
urban root
i would say those marks are caused buy wet filament, you should beable to here those pop if you just extrude filament through the nozzel
you PA setting may need a little tweek looking at the corner
what does the bottom of the print look like
tawdry island
I did dry it for the recommended time, but polymaker only suggested 6 hours. My last petg was 12
Also printed this, weird layer lines in these bottom z layers
tawdry island
Youre seeing the underside of the single wall overhang. Probably the opposite side of those pinholes looking bad in the flash
urban root
ok the wet filament
urban root
Also printed this, weird layer lines in these bottom z layers
ill need the 3mf file to
what temperature did you dry it at?
tawdry island
60c
tawdry island
The bambu pro ams 2
tawdry island
This is after 8 hours of additional drying. It was a fresh roll of petg btw.
plush sierra
This is after 8 hours of additional drying. It was a fresh roll of petg btw.
I would try a different roll. Sometimes the filament can be so moisture logged that it cannot be recovered with any amount of drying.
tawdry island
What the hell polymaker
plush sierra
What the hell polymaker
Worth contacting them for a refund; they will probably just send you a whole new roll. First have to double-check by using a different roll of the same brand and filament type though.
urban root
@tawdry island how humid is it where you are?
and have you checked that your desicant is still ok, im in a very humid area and i get around 2 weeks in my dry box befor i have to replace the desicant
tawdry island
Its incredibly dry, winter in northern US. Plus this filament went straight from the vacuum sealed bag to my AMS. I have lab grade humidity indicator strips in both the ams plus all of my dry boxes - all have remained <5% humidity at all times.
urban root
filament isnt always dry out the bag in fact most of the times these days it isnt ..
from test ive done putting wet filament in a container with desicant doesnt dry out the filament it just stops it getting wetter , you have to heat it to get the moisture out
plush sierra
I wonder where the AMS 2 Pro is actually measuring the temp at. Most dryers measure it right next to the heating element and not the actual air temp in the chamber.
urban root
I wonder where the AMS 2 Pro is actually measuring the temp at. Most dryers meas...
that is also possible i was trying to find some data to see how hot the roll get s
tawdry island
yeah, that'd be interesting to see. now that i think of it.. I have a conductivity moisture meter for woodworking. I wonder if there's a setting that would get a reading on plastics
urban root
yeah, that'd be interesting to see. now that i think of it.. I have a conductivi...
i dont think so
if you have very accurate scales you can wqeigh the roll cook it for a couple of hours and see if it gets lighter
plush sierra
Found it!
It's probably fairly accurate in that spot.
Weird that they put the vent on the bottom though. Seems counterintuitive since heat and humidity rise.
urban root
tryinng to find someone on the internet who knows what they are talking about is getting more difficult
I dont think people know how %RH works they heated up the air and the humidity went down.. and if they cooled it it would go up. you cart take a %RH value at 2 different temperatures and compare them
plush sierra
Yep.
20% @ 50C = 75% @ 25C
finite turtle
rh is just kinda dumb if you're talking about anything other than conditioning air for meat sacks
we should just use absolute humidity
tawdry island
I don't particularly trust the hygrometer on the AMS itself. It fluctuates from like 3% - 30%. Yet my 5-10-15 strips have remained <5%. They are in a slightly different location relative to the hygrometer. I have hundreds of strips, I might just throw like 10 of them in random locations around the AMS lol
urban root
Type 1 and Type 2 HICs that have been exposed
to 60% or greater RH will no longer be considered
accurate."
these indicators are for packaging so might be ok for inside containerise filament , but not for drying
tawdry island
right the 60% thing is if the strips are saturated and you're attempting to revive them. mine have remained chemically unchanged, meaning they haven't experienced a sustained humidity past the low 5% mark. I primarily got them for my lil filament dry boxes but I threw some in my AMS cuz why not
urban root
when you start to dry filament you get a spike in humidity like this
tawdry island
any spike due to drying hasn't been sustained long enough to react with the indicator strips,* at least in the location of the strips*. But the strips are right next to a big pile of desiccant that perhaps gobbles up the H2O before it can react with the indicator.
I am in the process of sourcing some DH22 sensors that ima wire up with some RP Picos for my vivarium.. I wonder how well those do in the <10%
