#Stringing trouble

21 messages · Page 1 of 1 (latest)

knotty hedge
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Afternoon all, hoping I could get some advise for solving a stringing issue my newish M1.1 is having. I have been running iterations through Orcaslicer's retraction calibration but all the results are more or less similar. The surfaces all look pretty clean but this stringing has been giving me consistent trouble. Below are the settings I used as a baseline but I have been trying different combinations of changes.
Specifications: Phaetus Rapido w/ LGX Lite (using manufacturer recommended rotation settings, calibrated number was only slightly different and made no difference to the result) and a 0.4mm nozzle.
Slicer: Orcaslicer custom profile
Retraction: 0.5mm @35mm/s
Zhop: 0.2 normal
Wipe: 0mm, 100% amount (read some comments here that it could help)
Tested on Bambu plain PLA and eSUN PLA+ at 215-220 degrees, both thoroughly dried before and during testing. Flow ratio of 1 from the stock profile of 0.98, flow calibration actually indicated an under extrusion at base. Stock fan settings.
Speeds are relatively modest with travel at 150, sparse infill 100, and everything else in the 50-60 range.
I also did a fresh PID tune before I got started.

Any help or suggestions are appreciated. Its so close to being an awesome machine.

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south fable
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Does it occur without Z Hop?

knotty hedge
knotty hedge
knotty hedge
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Good news, I have fixed it being so stringy every layer. Turns out I was using the wrong thermistor setting in klipper for my rapido. Still needs tuning but at least now the results are noticeably different as it goes through the retraction distances.

knotty hedge
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Unfortunately it is still fighting me even after selecting the right sensor and pid tuning. Feels like I am staying about the same no matter what extruder settings I change.

fossil shuttle
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maybe test another filament as well? could be wet

knotty hedge
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This is probably the best filament I have for testing. At this point it's been in a drybox (ik about venting moisture) for over 3 days and I just got done using it in my p1s not too long ago without any problems. Other filaments I tried have netted the same result.

knotty hedge
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Onto something. Bumping up my wipe distance has made a sizable impact. I'll give it another go tomorrow and we will see if that makes the difference.

reef flame
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Did you try to increase retraction distance? 0.5mm is a bit on a low side

knotty hedge
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I have been testing a bunch of setting combinations. A wipe distance of 8 @ 100% has made my retraction tests significantly cleaner. Still getting some strings on my benchy but I am hopefully getting closer to dialing it in.

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I used 0.75 in my last test and there were some fine strings so I'll be bumping it up and maybe lowering my temp to 215 and see if that helps the rest of the way.

fossil shuttle
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I don't know if it helps you, but for reference i run 1.5mm retraction 120mm/s at my orbiter 2.0 - whereas 35mm/s 0.5mm retraction with my sherpa mini - so it can differ quite a bit...

knotty hedge
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Good to know, always helps to get more references. I was toying with settings today when I heard the distinct snap crackle fizz of wet filament. Which is nuts considering how long my bambulab pla has been sitting in a drybox over the past week. I swapping in some polymaker polylite pla that was just a smidgen wet and the results were almost perfect. So hopefully after a day of dehydrating the results are perfect tomorrow. Looks like 1mm 33mm/s are the core retraction settings. We will see if I can reduce the wiping a bit.

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What kind of wipe settings do you use on your machines out of curiosity?

fossil shuttle
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great that you found the problem 🤞 tbh i don't use wipe at all, and also no z-hop

knotty hedge
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Interesting. Yeah i was wrestling back and forth with some settings but it looks like it is coming off super clean this time.

knotty hedge
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So close

fossil shuttle
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you can just use a lighter to get rid of the remaining strings 😜 way to go!