Got the H2D to help finish out a big job printing these J shaped clips - 100% solid ASA, about 1.25 x 1" x 1/4" tall- underwhelming for an H2d but hey I have plans for that thing when this job is over! I dialed the job in on my P1S and got things rolling wonderfully - 50 at a time day in and day out, great prints with no issues. I got the H2D set up and was able to use the same settings to get the same results right off the bat and things were good… till i took a couple days off. when I came back it wanted to update so I did. the next print went Ok for the First half then I started getting roughness in the tops surface similar to what is described in as over extruding, and a tapering in the vertical walls.
I’ve tried slowing things down more, playing with temps, flow calibration to no avail. any ideas would be greatly appreciated. I’m using Polylite ASA, 60C chamber temp 100C bed temp. speeds are about 120, with inititial layers down at 50 - again these settings have worked great up till now. also of note is that the P1S got though an update with no issues…
After installing the new firmware, did you reset the printer and run a fresh calibration?
If the issue started after the update, you could try rolling back to the previous firmware to see if it resolves the problem especially since it was printing the file fine before.
thank you - re-started this morning and its running a full calibration. fingers crossed. roll-back is next I suppose.
I had similar issues when I first was dialing in my P1S for this run of parts and resolved it by slowing things down. just not seeing any changes when adjusting speed settings
I did not. I’ve been going through fillament pretty fast and have not dried any of it - Northern cali - its been warm dry here and have seen no issues.
That said it’s certainly not to be ruled out and I’ll fire up the ams today and run it through a dry cycle.
well it’s low but it’s not water proof. also I can’t find the water absorption rate for Polylite ASA but some ASA does have a higher absorptio rate like 0.5% ish.
Do a custom flow rate calibration. It will fix the over extrusion issues you are having. I had similar issues and getting the flow rate and temperature perfect made all the difference.
Can’t explain why it changed from one day to the other. Just have to calibrate and move forward till an answer presents itself.
Waterproofing has nothing to do with water absorption.
Here you go with PolyLite ASA, it’s easily available on the TDS.
It needs to stop blaming every imperfections to a wet filament by default. Plastic, including TPU and PETG, are not so water absorbent to the point where it causes major issues, despite what filament dryer manufacturer like to claim. Sure, it affects surface finish and may look unsightly in some cases, but not in the case of severe over-extrusion (as it at least appears to be from that picture).
re-calibrating after update not the issue.
I did do a flow rate calibration yesterday to no avail. I did not play with fans and temps to much. those are default for polylite ASA so that might be my next move, then maybe a Firmware Roll-back, and solid drying session.
@Dr_Cemento However, the 100% infill is a setting that needs to be “earned”. I’m not sure the H2D profile is set up to do that well. I would try to run a few test prints to pin down a perfect flow rate. 100% infill leaves ZERO room for missed flow ratio settings if you are looking for perfect prints. If you prefer not to run a series of flow rate tests, try lowering the infill to 90%. Probably still overkill, but should leave some wiggle room for inaccuracies in the flow. Another option is tons of walls. Something like 50 walls should fill it out fully and that generally isn’t as sensitive to flow ratio as 100% infill.
Overall, I thinking your flow ratio is just a little too high, and 100% infill really penalizes over extrusion if quality is a concern.
Ok - on the prepare page I edited the project filament profile and tried again… brought the flow rate down to .80 from .95 and brought the min. temp up to 260 from 240, and… solved. may play with it even more but its at least as good as before.
I run a custom fab shop specializing in precast concrete. we are working on cladding an entire house with these panels. the contractor requested a spacer of some sort that could attach to the mounting rail - this is what i came up with - clips on nicely but stays loose when on to allow for expansion/contraction. printing 2,000 of them. paid for my H2D and then some! this is a pic of the mock up
I noticed recently 2 things.
First: watch for top ironing. This can cause a lot of issues if used at the wrong time.
Second: all the layers switched from .2mm to .16mm which in the wrong situation can cause extruding issues and so on. I am getting kind of sick of them changing settings and not notifying us honestly.
I noticed you posted a photo showing some over-extrusion strange that it was printing fine before.
I don’t use the factory filament profiles myself, but I wonder if Polymaker’s profile was updated. A lot of people have automatic updates enabled, and since the profiles are also cloud-based, it could have changed without you realizing it.
I’m not sure maybe others who use the cloud based profiles and have updates enabled can chime in with their experience.
