• Tags
  • Documentation
  • Order
  • Register
  • Login
Duet3D Logo Duet3D
  • Tags
  • Documentation
  • Order
  • Register
  • Login

Strange textured print

Scheduled Pinned Locked Moved
Tuning and tweaking
httpsimgur.comgallery4owps2f
5
15
478
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • undefined
    Eclipssato @Veti
    last edited by Eclipssato 26 Jan 2020, 10:59

    @Veti
    M350 X32 Y32 Z32 I0 ; configure microstepping with interpolation (I1 = on, I0=off)

    on my older hadmade 3d printer i had problem with interpolation at 256microstepping, causing similar problem like ones that i have here (but on marlin firmware) so i'm triying to understand if it was an firmware problems or not, using standard 32 microstep without interpolation, and interpolate only motor, tried also to interpolate all/interpolate no ones, motors at 16, 32 microstepping
    nothing changed at all

    i'm printing with 3d jake niceabs
    specs said 240/260 degrees extruder
    80 degrees bed

    i'm just printed a couple of kiloes with this settings without problems at all, so i suppose could be the same on reprap firmware (first board with it for me)

    undefined 1 Reply Last reply 26 Jan 2020, 11:16 Reply Quote 0
    • undefined
      Veti
      last edited by 26 Jan 2020, 11:15

      @Eclipssato said in Strange textured print:

      i'm just printed a couple of kiloes with this settings without problems at al

      did you have a pt100 on the other printer as well?

      due to the nature of the thermistors temperature on one printer is not equal to another.
      pt100 and pt1000 beeing the exception here.

      undefined 1 Reply Last reply 26 Jan 2020, 11:29 Reply Quote 0
      • undefined
        deckingman @Eclipssato
        last edited by 26 Jan 2020, 11:16

        @Eclipssato Your picture looks a lot like some prints I once had with a bad batch of PET-G. Have you kept that PET-G dry? (Although in my case the filament was fresh out the sealed package so must have been subjected to moisture before it was packed and sealed).

        Try printing with some other filament - preferably something that isn't hygroscopic - e.g. PLA and see if that makes any difference.

        Ian
        https://somei3deas.wordpress.com/
        https://www.youtube.com/@deckingman

        undefined 1 Reply Last reply 26 Jan 2020, 11:24 Reply Quote 0
        • undefined
          Eclipssato @deckingman
          last edited by 26 Jan 2020, 11:24

          @deckingman said in Strange textured print:

          @Eclipssato Your picture looks a lot like some prints I once had with a bad batch of PET-G. Have you kept that PET-G dry? (Although in my case the filament was fresh out the sealed package so must have been subjected to moisture before it was packed and sealed).

          Try printing with some other filament - preferably something that isn't hygroscopic - e.g. PLA and see if that makes any difference.

          its abs in my case, and yes, i've dryed it. i'm also sure of the quality of the material because ive printed later with the same spool on another printer for test. no isuue...

          1 Reply Last reply Reply Quote 0
          • undefined
            Eclipssato @Veti
            last edited by Eclipssato 26 Jan 2020, 11:29

            @Veti said in Strange textured print:

            @Eclipssato said in Strange textured print:

            i'm just printed a couple of kiloes with this settings without problems at al

            did you have a pt100 on the other printer as well?

            due to the nature of the thermistors temperature on one printer is not equal to another.
            pt100 and pt1000 beeing the exception here.

            no, i didn't, that's the first one with it

            sorry for the stupid question but.... 245 degree should not bee the same on every thermistors?

            i would like to understand why there's could be some difference between thermistors at the same temperature.

            if you consider that basically this printer it's made for printing peek and ultem, so thermistors will be really noticeable parts of the system, i have to learn about it

            1 Reply Last reply Reply Quote 0
            • undefined
              Veti
              last edited by 26 Jan 2020, 11:36

              @Eclipssato said in Strange textured print:

              sorry for the stupid question but.... 245 degree should not bee the same on every thermistors?

              unfortunatly not.

              for example B3950 thermistors are defined as
              B25/50=3950K

              Meaning for the range of 25C to 50C the beta value is 3950. it does not specify the beta above this and it can vary widely.

              undefined 1 Reply Last reply 26 Jan 2020, 11:49 Reply Quote 0
              • undefined
                Eclipssato @Veti
                last edited by Eclipssato 26 Jan 2020, 11:49

                @Veti
                ok, it make sense. thankyou
                now. i'm looking to the duet3d daughterboard pt100 and i see that with 100ohm resistance the displayed temperature should be 0 degree (exactly as the pt100 specs.)

                i've tested my pt100 at 0 degrees on ice and it release me 100 ohm , so it should be like factory specification.
                adding an 100 ohm resistance on the daughterboard i read -3.2 degree.
                it should be acceptable or i've have an defected board?
                i'm really not sure that this "3 degree less" could make me really difference during the print, specially if we suppose i'm printing too hot

                EDIT: checked now. it's -3.9 on both channels

                1 Reply Last reply Reply Quote 0
                • undefined
                  Veti
                  last edited by 26 Jan 2020, 12:01

                  as i said above pt100 and pt1000 should normaly be very accurate. the problem most of the time are other thermistors.

                  the easiest solution is to print a temperature tower and find the correct temperature to print for that printer.

                  undefined 1 Reply Last reply 26 Jan 2020, 13:22 Reply Quote 0
                  • undefined
                    Eclipssato @Veti
                    last edited by 26 Jan 2020, 13:22

                    @Veti said in Strange textured print:

                    as i said above pt100 and pt1000 should normaly be very accurate. the problem most of the time are other thermistors.

                    the easiest solution is to print a temperature tower and find the correct temperature to print for that printer.

                    i agree with you. looking fowards your suggestion i'm performing an temperature tower test, using simplify 3d , and not cura, at the moments seems that the texture problems are gone, even printing at 260 degrees.
                    sound strange, i will post a pic when print finish.

                    i wont believe that 3 weeks of issue was generate only from the gcode files of cura

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      Eclipssato
                      last edited by Eclipssato 26 Jan 2020, 16:10

                      https://imgur.com/gallery/WIn8KnM
                      As you can see seems that the issue was caused from some bad gcode writing from cura, exactly same print configuration in simplify3d works nice.
                      Test has been performer with 9 different temperature every 50 layer at 0.2 mm, and I think that work flawlessly at almost every temperature (some adjustments needed maybe, but nothing about temperature and extrusion) what do you think about it? How can I improve it more?
                      direct suggestion and critics are appreciated! 🙂

                      1 Reply Last reply Reply Quote 0
                      15 out of 15
                      • First post
                        15/15
                        Last post
                      Unless otherwise noted, all forum content is licensed under CC-BY-SA