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Triple z axis bed tramming

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  • undefined
    mrenz999 @Phaedrux
    last edited by 1 Sept 2020, 04:17

    @Phaedrux yep. That is the case.

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    • undefined
      Phaedrux Moderator
      last edited by 1 Sept 2020, 04:20

      Alright, so now with that in mind, lead screw positions in M671 correct, M208 axis limits correct, probe offset correct, motor order matches.. that leaves us with the points in bed.g and my original question.

      Are the points defined in your bed.g trying to place the probe as close to the lead screws as possible?

      A good way to check would be to move your print head such that the probe is as close as possible to the first lead screw, then use that current head position as the point to probe, repeat for the other lead screws.

      Z-Bot CoreXY Build | Thingiverse Profile

      undefined 1 Reply Last reply 1 Sept 2020, 04:22 Reply Quote 0
      • undefined
        mrenz999 @Phaedrux
        last edited by 1 Sept 2020, 04:22

        @Phaedrux those are exact. I couldn’t probe them.

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        • undefined
          Phaedrux Moderator
          last edited by 1 Sept 2020, 04:34

          Can you post your homeall?

          When you run G32 does it home correctly and then move to the first point?

          Does the probe work otherwise?

          Z-Bot CoreXY Build | Thingiverse Profile

          undefined 2 Replies Last reply 1 Sept 2020, 14:46 Reply Quote 0
          • undefined
            mrenz999 @Phaedrux
            last edited by 1 Sept 2020, 14:46

            @Phaedrux

            ; generated by RepRapFirmware Configuration Tool v3.1.1 on Thu Jun 04 2020 11:20:25 GMT-0700 (Pacific Daylight Time)

            G91 ; relative positioning

            G1 H2 Z5 F6000 ; lift Z relative to current position

            G1 H1 X-450 Y-450 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)

            G1 H1 X-450

            G1 H1 Y-450

            G1 X5 Y5 F6000 ; go back a few mm

            G1 H1 X-450 Y-450 F360 ; move slowly to X and Y axis endstops once more (second pass)

            G1 X250 Y210 F9000 ; go to first bed probe point and home Z

            G30 ; probe the bed

            G1 H1 Z-465 F360

            G90

            G92 Z5

            Probe works. G32 command only goes near the 0,0 and then just stops.

            undefined 1 Reply Last reply 1 Sept 2020, 19:11 Reply Quote 0
            • undefined
              mrenz999 @Phaedrux
              last edited by 1 Sept 2020, 17:44

              @Phaedrux found part of the issue. The z motors were not mapped correctly in the bed.g. Fixed that. Now it homes all. Then goes back the home x and y and tries to probe which is off the bed.

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              • undefined
                Phaedrux Moderator @mrenz999
                last edited by 1 Sept 2020, 19:11

                @mrenz999 said in Triple z axis bed tramming:

                G30 ; probe the bed
                G1 H1 Z-465 F360
                G90
                G92 Z5

                This is a problem. You're first using the probe to find Z0, but then you're also homing using an endstop, and then forcing the Z position to Z5. Remove those last 3 lines to maintain the probed Z position, otherwise you're bound to have an offset from where it thinks the bed is and where the bed actually is. Use the probe to home Z. That's what it's meant for.

                @mrenz999 said in Triple z axis bed tramming:

                Then goes back the home x and y and tries to probe which is off the bed.

                As I said before, jog your print head such that the probe is where you want it to probe, the XY coordinates of the head at that point is what you want to use in the bed.g points.

                Z-Bot CoreXY Build | Thingiverse Profile

                undefined 1 Reply Last reply 1 Sept 2020, 20:22 Reply Quote 0
                • undefined
                  mrenz999 @Phaedrux
                  last edited by 1 Sept 2020, 20:22

                  @Phaedrux
                  Ok new bed.g
                  ; bed.g
                  ; called to perform automatic bed compensation via G32
                  ;
                  ; generated by RepRapFirmware Configuration Tool v3.1.1 on Thu Jun 04 2020 11:20:24 GMT-0700 (Pacific Daylight Time)
                  M561 ; clear any bed transform
                  ;G29 ; probe the bed and enable compensation
                  G28 ; home
                  ;M401 ; deploy Z probe
                  G30 P2 X20 Y110 Z-99999 ; probe near an adjusting screw
                  G30 P3 X20 Y365 Z-99999 ; probe near an adjusting screw
                  G30 P4 X430 Y240 Z-99999 S3 ; probe near an adjusting screw and calibrate 3 motors
                  G29
                  ;M402 ; retract probe

                  New homeall.g

                  ; generated by RepRapFirmware Configuration Tool v3.1.1 on Thu Jun 04 2020 11:20:25 GMT-0700 (Pacific Daylight Time)

                  G91 ; relative positioning

                  G1 H2 Z5 F6000 ; lift Z relative to current position

                  G1 H1 X-450 Y-450 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)

                  G1 H1 X-450

                  G1 H1 Y-450

                  G1 X5 Y5 F6000 ; go back a few mm

                  G1 H1 X-450 Y-450 F360 ; move slowly to X and Y axis endstops once more (second pass)

                  G1 X264 Y250 F9000 ; go to first bed probe point and home Z

                  G30 ; probe the bed

                  ;G1 H1 Z-465 F360

                  ;G90

                  ;G92 Z5

                  undefined 1 Reply Last reply 1 Sept 2020, 21:05 Reply Quote 0
                  • undefined
                    Phaedrux Moderator @mrenz999
                    last edited by 1 Sept 2020, 21:05

                    @mrenz999 said in Triple z axis bed tramming:

                    G30 P2 X20 Y110 Z-99999 ; probe near an adjusting screw
                    G30 P3 X20 Y365 Z-99999 ; probe near an adjusting screw
                    G30 P4 X430 Y240 Z-99999 S3 ; probe near an adjusting screw and calibrate 3 motors

                    Shouldn't that be P1 P2 P3? Your points start at P2 for some reason.

                    Z-Bot CoreXY Build | Thingiverse Profile

                    undefined 1 Reply Last reply 1 Sept 2020, 21:21 Reply Quote 0
                    • undefined
                      mrenz999 @Phaedrux
                      last edited by mrenz999 9 Jan 2020, 21:24 1 Sept 2020, 21:21

                      @Phaedrux
                      That's the assigned motors for Z
                      Is that not the correct way to put it ?
                      ; Drives
                      M569 P0.0 S0 ; physical drive 0.0 goes forwards
                      M569 P0.1 S1 ; physical drive 0.1 goes forwards
                      M569 P0.2 S0 ; physical drive 0.2 goes forwards
                      M569 P0.3 S0
                      M569 P0.4 S1
                      M569 P0.5 S0 ; physical drive 0.3 goes forwards
                      M584 X0.0 Y0.1 Z0.2:3:4 E0.5 ; set drive mapping
                      M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
                      M92 X80.00 Y80.00 Z400.00 E420.00 ; set steps per mm
                      M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
                      M203 X20000 Y20000 Z600 E3600.00 ; set maximum speeds (mm/min)
                      M201 X3000 Y3000 Z100 E5000 ; set accelerations (mm/s^2)
                      M906 X1600 Y1600 Z1600 E1600 I30 ; set motor currents (mA) and motor idle factor in per cent
                      M84 S30 ; Set idle timeout
                      M671 X20:20:430 Y110:365:240 S0.5 ; leadscrews at rear left, front middle and rear right

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                      • undefined
                        Phaedrux Moderator
                        last edited by 1 Sept 2020, 21:34

                        No, in this context G30 P is the number of the point to probe

                        https://duet3d.dozuki.com/Wiki/Gcode#Section_G30_Single_Z_Probe

                        You're probing 3 points and doing 3 point correction, so use p1 p2 p3

                        Z-Bot CoreXY Build | Thingiverse Profile

                        undefined 2 Replies Last reply 1 Sept 2020, 22:23 Reply Quote 0
                        • undefined
                          mrenz999 @Phaedrux
                          last edited by mrenz999 9 Jan 2020, 22:24 1 Sept 2020, 22:23

                          @Phaedrux Ok changed that. It goes to all 3 points now and probes but then says error: 3 points expected 0 probed.
                          G32
                          Error: Bed calibration : 3 factor calibration requested but only 0 points provided

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                          • undefined
                            mrenz999 @Phaedrux
                            last edited by 1 Sept 2020, 22:30

                            @Phaedrux Should I change Defining my mesh to less points ?

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                            • undefined
                              Phaedrux Moderator
                              last edited by Phaedrux 9 Jan 2020, 22:32 1 Sept 2020, 22:32

                              Mesh is different. That's G29 and M557. Not related to independent leveling.

                              My mistake. It should be P0 for the first point and not P1. So P0 P1 P2

                              There is quite literally an example here: https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors#Section_Example_for_3_motors

                              Z-Bot CoreXY Build | Thingiverse Profile

                              undefined 1 Reply Last reply 1 Sept 2020, 22:43 Reply Quote 0
                              • undefined
                                mrenz999 @Phaedrux
                                last edited by 1 Sept 2020, 22:43

                                @Phaedrux That did it. Now I have an error saying it exceed limits lol. That I can work on.
                                Thank you so much for your help and patience.

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                                • undefined
                                  Phaedrux Moderator
                                  last edited by 1 Sept 2020, 23:01

                                  @mrenz999 said in Triple z axis bed tramming:

                                  S0.5

                                  Might need to increase the S value in M671

                                  Z-Bot CoreXY Build | Thingiverse Profile

                                  undefined 1 Reply Last reply 1 Sept 2020, 23:41 Reply Quote 0
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                                    mrenz999 @Phaedrux
                                    last edited by 1 Sept 2020, 23:41

                                    @Phaedrux Did that. Thanks again. Do you know if I can plug a webcam into the SBC ?

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                                    • undefined
                                      Phaedrux Moderator
                                      last edited by 2 Sept 2020, 00:20

                                      Yes you can plug an webcam into the SBC but it won't automatically show up in the DWC. I think you'd need it to work as a network streaming webcam and then point DWC to the stream url.

                                      Z-Bot CoreXY Build | Thingiverse Profile

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