Snapmaker PVA is stringing ... and other issues

Snapmaker J1/J1s
1

Hi

  • The PVA filament provided with the printer is stringing a lot

    1 - I use a filament dryer
    2 - I keep raising the retraction speed and distance
    3 - I keep lowering the nozzle temperature

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  • I have set 100% infill on the right extruder and this is NOT printed with 100% infill

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  • I keep calibrating XY offsets, but objects are not aligned, is there a way to manually adjust them ?

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  • Saving the project does not save objects positions and translations

any help appreciated

2

FWIW as me being a Snapmaker 2.0 user - I yet did not succeed to get stringing away with PVA (I use eSun), but at least oozing I have somewhat under control: With very aggressive retraction settings. I ended up with 8 mm retraction distance - it works well with the dual extruder head hotends, which I think are not too dissimilar from the J1’s. No clogging - I think the melt zone is large enough. I even went to 13 mm once and this also worked, but I might just have been lucky - 13 mm is a lot, even with the relatively large heater blocks.
I yet did not play around with retraction speed - it may have an influence. I have a project upcoming in the next weeks which will again use PVA - if I have any success with retraction speeds, I’ll update here.

3

I get better results by lowering the temp around 190° and raising the retraction distance
but stringing is still there

4

any idea why is the infill settings not working ? do you use luban ? that software has big issues

5

Can’t tell the root cause of your issue, but I would advise the following:

  1. Do not retract more than 2mm on the J1/J1S as it may clog your printhead due to heatcreep.
  2. For the infill issue, I would definitely try another slicer. I can recommend OrcaSlicer (the original one, not the Snapmaker Orca) with the sm2uploder tool. Alternatively, Cura 5.9 works fine with the snapmaker plugin. Do not use Cura 5.10 as it has a bug with dual extruder machines. It is a known bug and a fix should come with the next update.
  3. For the X/Y calibration, the default routine on the J1 works fine for me. Make sure the nozzles are extra clean, otherwise the measurement might be incorrect.
1 Like
6

orcaslicer does not allow different materials

I can only select one material

and the once you selected 0.4 nozzle, it’s like, you cannot change it, you have to select a different printer somewhere I guess

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7

Did you try a clean install of the latest OcraSlicer 2.3.0?

Also, you may need to enable the Advanced options (see below).

Then you should have options to select which filament is used for support.

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