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

    Mesh calibration not working or what am I doing wrong?

    Scheduled Pinned Locked Moved Unsolved
    Tuning and tweaking
    11
    93
    4.2k
    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.
    • Vetiundefined
      Veti
      last edited by

      @Dep said in Mesh calibration not working or what am I doing wrong?:

      The maximum number of points is 121

      https://duet3d.dozuki.com/Wiki/Using_mesh_bed_compensation

      There is a firmware-dependent limit on the number of 441 probe points allowed.

      1 Reply Last reply Reply Quote 0
      • Depundefined
        Dep
        last edited by

        I have a 0.8.5 board. And when i try to make more than 121 points, it gives an error.

        But even with this number of points. They overlap the model. Why is it not calibrated.

        I think there is some kind of limit on the calibration height.

        I have spent many days and can not solve this problem.
        There is no technical possibility to make a flat table on such sizes.

        I don’t know what to do next. 😞

        1 Reply Last reply Reply Quote 0
        • Vetiundefined
          Veti
          last edited by

          what firmware version are you using?

          1 Reply Last reply Reply Quote 0
          • Depundefined
            Dep
            last edited by

            Duet 0.85
            RepRapFirmware for Duet 1.25RC4 (2019-10-19b1)

            1 Reply Last reply Reply Quote 0
            • Depundefined
              Dep
              last edited by

              @Veti said in Mesh calibration not working or what am I doing wrong?:

              M557 X500:1000 Y150:600 S10

              03.11.2019, 14:40:36 M557 X500:1000 Y150:600 S10
              Error: M557: bad grid definition: Too many grid points; suggest increase spacing to 47.4mm

              1 Reply Last reply Reply Quote 0
              • Vetiundefined
                Veti
                last edited by

                try decreasing the mesh area and see if the result improves, allowing more probing points in a smaller area.

                1 Reply Last reply Reply Quote 0
                • Depundefined
                  Dep
                  last edited by

                  I tried to reduce to 20mm. That helped. But now I don’t know, maybe I came across a flat section of the table?

                  But I need the printer to work on a large table. I don’t understand what the problem is.

                  Why calibration is not working? There may be some kind of configuration problem.

                  After all, in theory, for firmware it does not matter how uneven the bed is.

                  Either there are limitations in the firmware, or maybe the adjustment is not accurate and it is not visible at small values. But it becomes noticeable with a large roughness.

                  Vetiundefined 1 Reply Last reply Reply Quote 0
                  • Vetiundefined
                    Veti @Dep
                    last edited by

                    @Dep said in Mesh calibration not working or what am I doing wrong?:

                    I tried to reduce to 20mm. That helped. But now I don’t know, maybe I came across a flat section of the table?

                    look at the mesh calibration image to check.

                    1 Reply Last reply Reply Quote 0
                    • Depundefined
                      Dep
                      last edited by

                      If you mean to look at the program code, then unfortunately I am not good at programming.

                      1 Reply Last reply Reply Quote 0
                      • Vetiundefined
                        Veti
                        last edited by

                        no the image of the you see after running mesh bed compensation.

                        1 Reply Last reply Reply Quote 0
                        • fcwiltundefined
                          fcwilt
                          last edited by

                          Hi,

                          Have you ever defined a probing grid that covers the entire bed?

                          If not would you do that, probe the bed and post the height map here?

                          Thanks.

                          Frederick

                          Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

                          Depundefined 1 Reply Last reply Reply Quote 0
                          • Depundefined
                            Dep
                            last edited by

                            Made a calibration with the parameters: M557 X500:700 Y150:230 S20

                            RepRapFirmware height map file v2 generated at 2019-11-03 18:06, min error -0.633, max error -0.047, mean -0.346, deviation 0.137
xmin,xmax,ymin,ymax,radius,xspacing,yspacing,xnum,ynum
500.00,700.00,150.00,230.00,-1.00,20.00,20.00,11,5
 -0.329, -0.318, -0.282, -0.248, -0.238, -0.218, -0.195, -0.176, -0.133, -0.089, -0.047
 -0.377, -0.358, -0.342, -0.314, -0.324, -0.287, -0.280, -0.235, -0.199, -0.162, -0.118
 -0.484, -0.434, -0.434, -0.435, -0.375, -0.344, -0.337, -0.308, -0.259, -0.216, -0.163
 -0.541, -0.507, -0.491, -0.479, -0.467, -0.427, -0.433, -0.389, -0.338, -0.282, -0.226
 -0.633, -0.607, -0.580, -0.550, -0.533, -0.510, -0.484, -0.463, -0.407, -0.353, -0.298

                            2019-11-03_18-12-24.png

                            I still can’t understand what this can give us? 🙂

                            1 Reply Last reply Reply Quote 0
                            • Depundefined
                              Dep @fcwilt
                              last edited by

                              @fcwilt Bed Size X1380 Y1210
                              I only calibrate 500 x 500

                              But the part fits in this size. It is inside a calibrated space.

                              Do you think if not the entire bed is calibrated this can cause an error? But how to do that? Maybe reduce the table and set offsets?

                              fcwiltundefined 1 Reply Last reply Reply Quote 0
                              • fcwiltundefined
                                fcwilt @Dep
                                last edited by

                                @Dep said in Mesh calibration not working or what am I doing wrong?:

                                @fcwilt Bed Size X1380 Y1210
                                I only calibrate 500 x 500

                                But the part fits in this size. It is inside a calibrated space.

                                Do you think if not the entire bed is calibrated this can cause an error? But how to do that? Maybe reduce the table and set offsets?

                                One height map you posted was absolutely terrible.

                                I just want to get picture of the entire bed as a reference.

                                Not having the entire bed calibrated shouldn't cause an error unless you try to print outside that area.

                                But there is not much point in having a large bed if you cannot use it all.

                                Thanks.

                                Frederick

                                Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

                                Depundefined 1 Reply Last reply Reply Quote 0
                                • Depundefined
                                  Dep @fcwilt
                                  last edited by

                                  @fcwilt said in Mesh calibration not working or what am I doing wrong?:

                                  One height map you posted was absolutely terrible.
                                  I just want to get picture of the entire bed as a reference.
                                  Not having the entire bed calibrated shouldn't cause an error unless you try to print outside that area.
                                  But there is not much point in having a large bed if you cannot use it all.

                                  Now I can’t make a height map of the whole table, because glass 650 x 650 mm is fixed on the table

                                  Yes, the bed is very crooked. But why doesn't compensation work? Does it really matter how rough the bed is?

                                  Vetiundefined fcwiltundefined 2 Replies Last reply Reply Quote 0
                                  • Vetiundefined
                                    Veti @Dep
                                    last edited by

                                    @Dep said in Mesh calibration not working or what am I doing wrong?:

                                    Does it really matter how rough the bed is?

                                    with a bed as uneven as that it does.
                                    the points in beetween probing are calculated and dont reflect what is actually there.
                                    so if the bed is not uniformly uneven it will be off.
                                    with it beeing off by an entire layer means this error can be significant.

                                    1 Reply Last reply Reply Quote 0
                                    • Depundefined
                                      Dep
                                      last edited by

                                      Yes, I agree, but the table is made of 4mm glass. It cannot be a “spasmodic” curve. I hope I wrote correctly 🙂

                                      Those. the glass of course bends around the table, but these are smooth bends.

                                      1 Reply Last reply Reply Quote 0
                                      • fcwiltundefined
                                        fcwilt @Dep
                                        last edited by

                                        @Dep said in Mesh calibration not working or what am I doing wrong?:

                                        Now I can’t make a height map of the whole table, because glass 650 x 650 mm is fixed on the table

                                        Yes, the bed is very crooked. But why doesn't compensation work? Does it really matter how rough the bed is?

                                        I see. Have you probed the glass area? Have you posted the height map here?

                                        If you are limited to 121 points its going to be hard to get an accurate picture of that area

                                        Probe a 220 by 220 area in the center of the glass and post the height map please.

                                        Frederick

                                        Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

                                        1 Reply Last reply Reply Quote 0
                                        • Depundefined
                                          Dep
                                          last edited by

                                          Ok, did it:

                                          RepRapFirmware height map file v2 generated at 2019-11-03 19:31, min error -1.658, max error -0.124, mean -0.815, deviation 0.349
xmin,xmax,ymin,ymax,radius,xspacing,yspacing,xnum,ynum
600.00,800.00,300.00,500.00,-1.00,20.00,20.00,11,11
 -0.817, -0.773, -0.734, -0.627, -0.614, -0.546, -0.462, -0.402, -0.332, -0.225, -0.124
 -0.884, -0.839, -0.803, -0.752, -0.669, -0.608, -0.543, -0.447, -0.357, -0.249, -0.197
 -0.951, -0.911, -0.876, -0.794, -0.727, -0.650, -0.593, -0.466, -0.392, -0.303, -0.221
 -1.018, -0.982, -0.927, -0.866, -0.784, -0.719, -0.652, -0.532, -0.477, -0.361, -0.230
 -1.112, -1.084, -1.003, -0.936, -0.846, -0.780, -0.662, -0.569, -0.475, -0.394, -0.303
 -1.191, -1.137, -1.079, -1.004, -0.908, -0.821, -0.727, -0.628, -0.552, -0.449, -0.337
 -1.293, -1.210, -1.157, -1.087, -1.000, -0.896, -0.788, -0.681, -0.595, -0.441, -0.354
 -1.398, -1.303, -1.233, -1.160, -1.062, -0.968, -0.864, -0.753, -0.645, -0.521, -0.419
 -1.490, -1.404, -1.323, -1.231, -1.137, -1.033, -0.924, -0.789, -0.704, -0.581, -0.453
 -1.544, -1.474, -1.409, -1.314, -1.201, -1.101, -0.995, -0.886, -0.752, -0.614, -0.506
 -1.658, -1.574, -1.497, -1.390, -1.277, -1.162, -1.050, -0.925, -0.774, -0.658, -0.533

                                          Offset down because the table is not heated now

                                          1 Reply Last reply Reply Quote 0
                                          • Vetiundefined
                                            Veti
                                            last edited by

                                            please post the images as well

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