keen adder
I guess I threw myself into the ring too
Print on my Positron v3.2, so Bowden set up and upside down, about 300mm tube, 1.9mm ID Capricorn XS.
I notice that I nailed some other parts down but some is not the best. Sliced with 2.3.1 beta + adaptive PA, both the columns are seized in - I suppose it was a seam problem.
Bridge is quite droopy, the tips of the columns are melted but there (I suppose lack of cooling at I am at 100% for those layers - at max of the machine).
Here is the current profile I am using
old remnant
have you updated to the release version?
keen adder
I was using the last profile I could find on that thread. But if there is newer, would you mind linking it?
old remnant
go to orca menu , "help" check for new updates"
keen adder
go to orca menu , "help" check for new updates"
Ah you meant Orca slicer. Yes I am. Using flatpak and that update daily. Didn't even realize that it already updated over the the beta version
old remnant
yes get the update 🙂
keen adder
yes get the update 🙂
I mean I am already got the official 2.3.1 👍 these are sliced just some days ago)
old remnant
is the test print with the new release?
keen adder
Yes. 2.3.1
I was watching multiple time and noticed that because the extreme overhang droop, so the nozzle will just push the whole plate up when running over because the edge is not flat after dropping (droop up, of course). Due to how the bed assembled, it's only rigid when being pulled down, not up.
So it explains the gap between those layers at the top of the benchy top, but I am not able to find a way to fix those overhangs properly.
Also I notice when slicing, both classic and arachne has a pretty big wide line for the center line for the roof overhang in front. And I did notice most of these line dropping are thicker/bigger flow lines
old remnant
I was watching multiple time and noticed that because the extreme overhang droop...
classic has a bug in it at the moment , if you print the test model again follow the instrustion for set up
keen adder
classic has a bug in it at the moment , if you print the test model again fol...
The test piece is sliced with arachne and followed the guide there actually. I was asking about the benchy roof overhang)
keen adder
Yup. I do have them there) that's why I mentioned budging. And opened a thread to get help 👍
I feel like my calibration shape is in pretty okay shape atm.
Can you take a look at the 3mf I included also to see if anything can improve it?
old remnant
ive just looked at your 3mf file you have made quite a few changes , i think you need to start with just a generic filament profile again
keen adder
ive just looked at your 3mf file you have made quite a few changes , i think you...
My filament profile is started with a generic filament profile.
Beside temp and flow, max volume metric flow
Mainly that's all. I follow step by steps down like that.
If you start from a generic profile, what steps would you take to fix the issue?
old remnant
just humor me and use a generic file print test file
keen adder
Ok. But with my temp and flow, and max volumetric speed?
What about process? Does it looks alright?
keen adder
ok
I mean process to print, otherwise the settings required in profiles you asked are matched in with my current acceleration and speed. Filament profile stock generic, no PA, flow at stock generic, otherwise, fan, volume metric, temp, flow are to your request. Running now. Done in 20 mins so wait a sec.
keen adder
Hi)
old remnant
bit stringy , has the filament been dried?
keen adder
8h 50C food blast oven.
0.7mm retraction. 0.2mm detraction. Staying in dry box while printing and when not (has been 70-90% RH here for last 3 storms) and all my filaments are like that
Doesn't really happen on my DD extruder. This Positron only have about 300mm tube so it's pretty short.
Dry box has a out 200g of those little ball
10% in the box. I just dry the filaments yesterday
old remnant
im guess you have a direct drive
upside down printer👍
i would try the retraction test to see if you can tune it out,
keen adder
im guess you have a direct drive
Yup bowden. 300mm tube, also the extruder is basically a reshelled Orbiter V2.0 - confirmed by LDO and I checked, I swap the upgrade kit from the V2.5 in (gears, shaft, bearings). I have been trying to go up in retraction but such short tube, it actually doesn't need much. In fact without detraction it has huge gap when travel between part. So I leave the retraction as high as it somewhat clean (I don't mind cleaning it very much) and a bit of detraction like that to fill in the space.
So the test print looks somewhat ok? Except the tips with the lack of cooling, and stringing from retraction. For those details I have my direct drive printer to do, much easier.
Beside that, what could be improve if those 2 issues are ignored? Lack of cooling is not solvable due to the toolhead design, and the stringings on small details I don't do with this printer.
Mainly to be able to print functional parts while able to carry it around)
On my own profile I noticed much cleaner strings I guess because of the PA are tuned in.
old remnant
long bowden tubes will always get some stringing , and some filamets will string more than others
im guessing a printer like that will be less tolerant of profile setttings
keen adder
long bowden tubes will always get some stringing , and some filamets will str...
Yea. I am glad that it use a small bed and such short bowden. The strings are not what bothers me though.
But I mainly want to deal with the overhangs on the benchy and problems that it bump my layers up.
While also the layers on the 4 columns got budged out. That I actually don't know why. But my theory is that I don't cool them enough and they somewhat melted so when the nozzle moved back, neither the lines are clean as well.
keen adder
Hmmm. Like put fans on the side of the machine then I want to print a bit fast?
old remnant
make a couple of side air ducts
keen adder
Since atm my little one can run up to 20k accel 480mm/s with the speed test script for good 100 iterations (Hiwin rails really help there, but the H-bot schematics are bad for X axis).
So atm I am am capping it at 12k travel and 10k for the infills.
Even learnt that the pa test is no good pass 8k, I guess the travel distance too short for that...
I have to lower the PA all the way to 0.1 for infill else I have just super skinny strings that don't stick to anything
keen adder
make a couple of side air ducts
Not much space for more ducts on the tool head, ha ha. I even plan to convert it to 2x 4010 fans that back to back to each other vs one big fan atm
At the moment it already use dual ducts unlike the original
old remnant
if you can fit 5015 fan , i did a lot of test on them and found one from digikey with a good outpput
keen adder
if you can fit 5015 fan , i did a lot of test on them and found one from digike...
It already run a 5015) just it is facing down, below the metal plate.
Is there one with 24V and 3-pin JST?
At the moment the kit fan that LDO use is a 12V fan so it is limited to 80% max before it burns out
old remnant
let me find the part number for you its 24v DC
keen adder
more cooling if you can
Now you mentioned it.
I was running pretty conservative fan speed 30 to 85% since I prefer stronger layer adherence but the 4 columns that melted have pretty higher layer time due to the front hull that is solid so the overall fan speed for that layer is actually quite low. I will bump up the lowest fan speed to see if my Benchy improve : D
old remnant
keen adder
https://www.digikey.co.nz/en/products/detail/mechatronics-fan-group/B5015E24B-BS...
This is 2-pin fan? I never look but do klipper handle 2-pin fan correctly? Like, only doesn't read tach, I suppose?
old remnant
im sure you can use a 2wire , i dont use klipper
keen adder
https://www.digikey.co.nz/en/products/detail/mechatronics-fan-group/B5015E24B-BS...
I will consider checking on that : D
Digikey is a bit hard for me to order. I live neither EU or US, they actually can ship here however but custom will hold up packages too months on end.
But generally I don't print much PLA, I only use PLA to fix mechanical issues on my printer) and my PETG-CF/GF is even better at that, but PLA is a lot cheaper lol
old remnant
Digikey will deliver everywhere
keen adder
Digikey will deliver everywhere
Yup. My issue is not to order. To be able to take it out of custom here. I have a bunch of packages from AliExpress still there after 6 months.
Some old one took 8 months were the longest.
So other features of the test print looks good enough?
old remnant
other features look ok
keen adder
Also a question. Is there a way to limit the biggest line width that arachne will generate? I notice some overhang just got generate a huge 0.7mm line for my 0.4 nozzle and it droops crazy.
old remnant
Also a question. Is there a way to limit the biggest line width that arachne wil...
it should only go to 100% of your line witdh
if you have a 3mf file where it goes much larger post it on here and ill have a look
keen adder
it should only go to 100% of your line witdh
This is how it generate benchy for me. Setting as the original I posted above
old remnant
infill yes, is that the 3mf above
keen adder
That's the overhang on the front
Classic slicing also have similar issue.
Mainly when it generate that on the overhang, the huge plastic and extra flow is too much
old remnant
you can increase/decrease your line width a bit and they should all become the same width
just dont make the line width narrower than the dia of the nozzle
keen adder
Ah. So only way is to adjust general line width to pack more lines in that space, yea?
I only use 0.4 for top layer. The rests as you see, is from 0.42 and up
old remnant
if you set line witdh to 0.4 you may see more lines
keen adder
Ah okay. I thought so.
keen adder
more cooling if you can
Never mind the layer shift.
You're absolutely right.... I really thought that I can nail the hull means I could get away with lower fan speed for longer layer time. But yes. I got the minimum fan speed up to 70% and those are mostly resolved! Not enough cooling on the columns does make them melt all over the place!
And the normal bridge is still good. Just now I need to check slicer whenever I have overhang to see if no thick lines are generated.
Heh, thanks a ton!!!
[Solved] Bridge and budging on some model - tldr: not enough cooling!
I even printed this with z-hop on too. The drooping on outer overhang cause I always use outer/inner/outer so those have issue. Generally I don't design my own part with more than 50⁰ overhang so it's not a problem.
keen adder
you can increase/decrease your line width a bit and they should all become the ...
Okay. I tuned the bridge speed, flow, cooling (actually going down cause it blows so hard) using the bridge test piece. Extra parameter on overhang.
I am really super happy with what it is now. Beside the usual strings.
Thank you a lot
Won't win any contest but I am definitely using it for most for for sure
keen adder
Try to speed up but the cooling is definitely not enough for a 20-minutes benchy. The above is 30 mins but that's it. The 20-min with everything crank up actually finish just fine but cooling becomes a bottleneck
sour hill
Also a question. Is there a way to limit the biggest line width that arachne wil...
I thought I was something like 175% of line width as the max, but it will only use it where it cannot cover the space with the number of perimeters that are set. Or something like that.
keen adder
I thought I was something like 175% of line width as the max, but it will only u...
Yea. It can produce really wide line. Which I saw that it was using the minimum (default 25%) to calculate the max width.
keen adder
It looks like best is to use thinner lines for wall. But tbh. I rarely encounter this issue since when I design my own stuff in CAD (FreeCAD) I just use an actually wall thickness to have it multiple of wall width
