Help Calibrating Prusa Core One for PEBA 85A
Hi all!
I'm looking for some help/advice on calibrating my printer/profile for Siraya Tech's Rebound PEBA 85A ( https://siraya.tech/pages/siraya-tech-rebound-peba-85a-user-guide). This is my first time trying to print flexible filament, so I started by following the OrcaSlicer calibration guide ( https://www.orcaslicer.com/wiki/calibration/calibration_guide.html).
I started with the temperature tower and at first selected 255C; this print had issues with the top layer of each section (see photos in links below).
Next I did the max volumetric speed test, which had no notable issues; I selected 3 mm^3/s (sorry, no pictures of this print).
Here's where it got complicated. Next was the pressure advance test where I struggled to find a good value. I searched for advice on this test for flexible filaments, but struggled to find anything helpful/applicable. I tried the "line pattern" and the "chevron pattern" and both either gave inconclusive results, or too poor quality to make a good judgement.
Basically at this point I decided to just go for the part I wanted to print to see how bad it turns out. It actually wasn't terrible, but as you can see from the photos, far from ideal.
So, I'm hoping to get some advice for how to proceed with tuning my filament profile and/or modifying my print settings or model. Thanks!
Here's additional details to help:
- Your printer model.
- Prusa Core One+ (self assembled base model kit with upgrades)
- Any changes from the original design / modifications.
- I made the following modifications suggested in this post: https://forum.prusa3d.com/forum/prusa-core-one-how-do-i-print-this-printing-help/core-one-and-soft-tpu/
- Eventually I put the dry box above my Core One and directly fed the filament into the extruder w/o the PTFE tubing
- If possible, attach a .3mf file (in a .zip file)
- PEBA_85A_3mf_calibration_files - 3 latest test prints I've printed
- CoordinateSystemFrameTool - part I'm trying to print with PEBA
- if any steps have been done on your part to try and fix the situation.
- Before I first printed with the PEBA, I dried the filament per mfg recommendations with the Sunlu filament dryer / dry box. I dried it for 6-7 hours at 70C. After I struggled with the pressure advance tests, I dried the filament again for 6-8 hours and redid the temperature tower; quality was pretty much the same as the first attempt.
- When I started to run into issues with the pressure advance test, I cleaned the nozzle with the provided needle tool and a wire brush.
- I tried printing at 250C, but saw no noticeable improvement
- photos or videos showing the problem you are having if you need help with it, we have a guide here.
- Temperature Tower: https://photos.app.goo.gl/Ufd7R5W4b2pXdgKN8
- PA Chevron Test: https://photos.app.goo.gl/ViLVPdeRiyBDuD1B8
- Test Print: https://photos.app.goo.gl/3PFEm332e6Ps9BwJA
- Let me know if any of these links don't work.
PEBA in dry box, direct feed to extruder:
