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

Help on fixing bed mesh on Delta

Scheduled Pinned Locked Moved
General Discussion
5
32
1.9k
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
    MikeS @fcwilt
    last edited by 18 Sept 2020, 21:31

    @fcwilt i think that they don't get them to work "fine" but usable...but i understand them, they are like me: never surrender! 💪
    Delta are really pleasant to look at and really neat as aesthetic but i would never recommend one to someone that is not skilled in 3d printing! There is so much to learn and i have lose count years ago on the hours i've spent with this printer. I still hope that with a duet better hardware and firmware i'll manage to get it printing consistently. Tomorrow i'm going to recheck all the joints and mechanics in general...still sure that the problem is there, i hope to get at least the bed at around +-0.1mm at the end.

    1 Reply Last reply Reply Quote 1
    • undefined
      Veti
      last edited by 19 Sept 2020, 08:35

      just to rule out the ir as a problem you could try this probe
      https://de.aliexpress.com/item/32968709878.html
      its very check and i use it on my delta because i have no offset using it.

      undefined 1 Reply Last reply 19 Sept 2020, 10:06 Reply Quote 0
      • undefined
        MikeS @Veti
        last edited by 19 Sept 2020, 10:06

        @Veti I think it won't fit my layer fan mount. I'll get it anyway because it's cheap and could be useful anyway!
        However i've a little update. This morning i was checking carriages and arm mount and i felt that there was a little play between u joints and carriages. After disassembly i found that some custom adpater i've made have become a little loose (i think we are talking about some cents of mm). Here are some photos for reference:

        20200919_111908.jpg
        20200919_112001.jpg

        Now i've taken all apart, cleaned and tried to fill this little gap with threadlocker. It already feels stiffer but i now must wait 2/3 hours to let it cure. I'll post back with the results of next G32/G29 and see if that fixes something.

        1 Reply Last reply Reply Quote 0
        • undefined
          MikeS
          last edited by 19 Sept 2020, 10:50

          So after the fix:

          M666
          Endstop adjustments X0.45 Y0.00 Z-0.45, tilt X0.00% Y-0.39%
          M665
          Diagonals 269.000:269.000:269.000, delta radius 129.470, homed height 349.814, bed radius 120.0, X -0.431°, Y 0.121°, Z 0.000°

          after mechanical fixes.png

          I think to know why there is this blue line along Y axis and will try to fix it. However is it possible to change the probing sequence of G29? I would like to try to probe by column and not by row starting from far left on build plate and going up/down instead of left right, only to see if this lead to more even results among the bed.

          1 Reply Last reply Reply Quote 0
          • undefined
            MikeS @Veti
            last edited by MikeS 21 Sept 2020, 11:11

            @Veti didn't had time to get progress on bed calibration but i have exported my E3D V6 mount in STEP. I hope it can be useful to you or someone else 😃
            E3D mount V2.step
            The mount is split in 2 part with a little tolerance between so it can be mounted/unmounted without removing the extruder. It's designed to use screw and nuts but you can also use cable ties for testing.

            1 Reply Last reply Reply Quote 0
            • undefined
              MikeS
              last edited by 25 Sept 2020, 17:19

              @fcwilt just a quick update. Tried to black paint with standard spray paint the bed and probe can reach it also when it is put on the bottom side. Today high temp black paint has been delivered by amazon and now i've cleaned the glass from bed and sprayed the new one. Now i'm curing it on the heated bed at 120°C then i will do some test. Here's a bed map from the bed painted with standard paint:
              spray painted.png
              Also have printed and fixed some corners to help the mechanics to be more rigid.

              undefined 1 Reply Last reply 25 Sept 2020, 17:35 Reply Quote 0
              • undefined
                fcwilt @MikeS
                last edited by 25 Sept 2020, 17:35

                @MikeS said in Help on fixing bed mesh on Delta:

                @fcwilt just a quick update. Tried to black paint with standard spray paint the bed and probe can reach it also when it is put on the bottom side. Today high temp black paint has been delivered by amazon and now i've cleaned the glass from bed and sprayed the new one. Now i'm curing it on the heated bed at 120°C then i will do some test. Here's a bed map from the bed painted with standard paint:
                spray painted.png
                Also have printed and fixed some corners to help the mechanics to be more rigid.

                That looks better but there are still those peaks.

                Was that done with the paint on the top?

                Is this a fairly consistent result?

                Frederick

                Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                1 Reply Last reply Reply Quote 0
                • undefined
                  MikeS
                  last edited by MikeS 25 Sept 2020, 17:38

                  @fcwilt nope this was done with paint on the bottom of the plate so it should be nearly perfect considered that the glass is really flat (tested with rectified rails along the glass). I think the peaks are given by the structure of my delta that is not so rigid (Rostock Max V2 by seemecnc from 2014) it's made of "compressed carboard" also called melamine wood. Obviously it is not rigid as it would be if built with some aluminium.

                  1 Reply Last reply Reply Quote 0
                  • undefined
                    fcwilt
                    last edited by 25 Sept 2020, 17:41

                    Hi,

                    For diagnostic purposes you should try it with the paint on top to be sure you are not getting readings from reflections.

                    Frederick

                    Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      dc42 administrators
                      last edited by dc42 25 Sept 2020, 17:44

                      Here's a general guide for delta printers:

                      1. If the height map shows random peaks and dips, that is caused by inconsistent trigger height of the Z probe. The IR sensor suffers from this when the bed surface is reflective to IR, for example glass or PEI. Putting a matt black surface under the bed improves the IR sensor in this respect, but it's still not as good as some other types of probe e.g. Smart Effector.

                      2. If the height map shows ridges at one end of the X direction turning into valleys at the other, alternating with probing direction, this indicates backlash in either the carriages or the joints. Lubricating the joints and carriages may help. If the carriages are the source, higher belt tension or higher motor current may also help.

                      Yout latest height map is a lot better than earlier ones. It still shows effect #2 to some extent, but it looks as though you have eliminated #1.

                      Duet WiFi hardware designer and firmware engineer
                      Please do not ask me for Duet support via PM or email, use the forum
                      http://www.escher3d.com, https://miscsolutions.wordpress.com

                      1 Reply Last reply Reply Quote 1
                      32 out of 32
                      • First post
                        32/32
                        Last post
                      Unless otherwise noted, all forum content is licensed under CC-BY-SA