Hello everyone,
I’m experiencing severe stringing while running a retraction test in OrcaSlicer.
Printer setup:
Printer: Voron Switchwire
Firmware: Klipper
Extruder: Direct Drive
Nozzle: 0.4 mm
Filament: PLA
Slicer: OrcaSlicer
Issue description:
Long and thick strings between towers
Oozing and blobs on tower tips
Retraction appears ineffective even though it is enabled
Thanks & Regards
Fputra
Did you run the calibration in OrcaSlicer?
There are also clibratione tips here: Tuning | Ellis’ Print Tuning Guide and here: https://teachingtechyt.github.io/calibration.html
Is the filament in proper condition (dry enough)?
Hard to tell without the requested klippy.log. Please attach it to your next post.
In all, it is more a slicer and/or filament issue that one with Klipper.
Thank you for the response.
Yes, I have already run the basic calibration in OrcaSlicer, including the retraction test.
I followed this video guide:
https://www.youtube.com/watch?v=g8kNuXuziCc&t=301s
Regarding the filament, it was just newly opened from the sealed plastic packaging.
Hi @fputra ,
What hotend are you using and what temperature are you printing at? Also, depending on how humid it is where you are, you may still need to dry the filament even if it is newly opened.
I just remember as @3dcoded mentioned the hotend: I set up a wrong thermistor and it always was too hot.
@fputra : Again, please attach your klippy.log.
Hi, thanks for the follow-up.
I’m currently using an phaetus rapido 2 hotend.
For this retraction test, I was printing PLA at around 200 °C.
I understand your point regarding humidity — I’m located in a relatively humid environment, so even though the filament was newly opened, I will try drying the filament and re-running the test at a lower temperature to see if there’s an improvement.
Thanks.
klippy (1).zip (4.1 MB)
thank you
That hotend can have two different heat sensors:
The Phaetus Rapido 2 hotend typically uses either a PT1000 sensor or a 104NT-4-R025H42G (104NT) thermistor
Have you tried the 104NT in your setup?
BTW: Do you have a possibility to check the real temperature of the hotend? E.g. a multimeter with the multimeters own thermistor attached.
I haven’t tried configuring 104NT in my setup yet.
I also haven’t measured the temperature using a multimeter. However, I have previously disassembled the hotend and visually inspected the temperature sensor, and it appears to match the one shown in the attached image.
When I configure the temperature sensor in printer.cfg as:
sensor_type: ATC Semitec 104NT-4-R025H42G
the temperature reading is incorrect.
Even when the hotend is cold, it already reports around 157 °C.
I would try lowering the printing temperature to 180ºC and reprinting the retraction test. The Rapido 2 with the screw-in thermistor (I forgot which type) has been known to under report temperatures before.
Is the issue with all filaments or just this certain one?
This issue occurs with all filaments.
What I find unusual is that when I increase the travel speed to 7000 mm/min, the result becomes much cleaner with significantly less stringing.
However, when I reduce the travel speed to around 100 mm/s, heavy stringing appears again.
I’m trying to understand why slower travel moves result in more stringing, while much faster travel moves seem to improve the print quality.
However, on the other hand, very high travel speeds also cause problems.
When printing more complex models, the print sometimes loses bed adhesion and detaches from the bed.
Can you please post the gcode of the test object?
Pada Sab, 7 Feb 2026 pukul 22.35 Ewald <notifications@klipper.discoursemail.com> menulis:
(Attachment obeject 100 mms_PLA_4h42m.zip is missing)
Did you have a chance to see the email I sent?
The file is quite large, so I wasn’t able to upload it directly to this forum.
