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Dc42 ir probe on the way

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Tuning and tweaking
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  • undefined
    Torro
    last edited by 9 Jan 2019, 13:21

    Hi,

    Some question about that ir probe.
    CoreXY, e3d v6 lite (New heater Block)

    1. My try for config.g

    Endstops
    M574 X1 Y1 S0

    Z-Probe
    M574 Z1 S2
    M558 P1 H5 F120 T6000
    G31 P500 X0 Y-xx Zxx (have to measure)
    M557 X10:230 Y10:210 S20

    Is this correct?

    1. What about the x/y offset @ g31 and M557, do i have to calculate it?so when y offset is - 20, y min has to be 30 @M557 or is that calculated by duet and my nozzle is at Y30 when M557 wants to probe at Y10?

    2. What is M376? I don't get it. Google translate didn't helped. Do i need that? What is it good for?

    Thanks!

    undefined 1 Reply Last reply 9 Jan 2019, 17:31 Reply Quote 0
    • undefined
      Phaedrux Moderator @Torro
      last edited by 9 Jan 2019, 17:31

      @torro said in Dc42 ir probe on the way:

      so when y offset is - 20, y min has to be 30 @M557

      That's right. If you have it set so that the M557 has probe points that lay outside the reachable area it will skip them, but you can better maximize the grid layout by doing a little math yourself.

      M376 allows you to set how far you want bed compensation to continue up the print vertically. So if on the first layer you need 0.2 of adjustment, and you set the taper height to 5mm, it will reduce the amount of adjustment every layer until 5mm where it would stop adjusting. Depending on how your bed is unflat you may want to have some taper, or you may not want it at all. If it's the bed surface that has a slight dip, you can taper off and be fine, but if the unflatness of the bed is actually due to sag in the gantry you would want to have no taper so that the sag is corrected for the entire print. I hope that makes sense.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • undefined
        Torro
        last edited by 9 Jan 2019, 19:38

        Ok, got it. Thanks a lot!

        1 Reply Last reply Reply Quote 0
        • undefined
          Torro
          last edited by 16 Jan 2019, 19:02

          Hi there,

          I just installed the mini IR probe. Mounting and cables was no problem.

          Now, i have a problem to set the trigger height.
          I followed those manuals:

          https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe
          https://miscsolutions.wordpress.com/mini-height-sensor-board/

          home Z -> M564 S0 -> moving slowly -Z until paper is gripped -> G92 Z0 -> move Z10 -> G30 S-1

          i get a trigger height of 0.46 to 0.48mm. i put this in the G31 command as seen here:

          Endstops
          M574 X1 Y1 S0
          Z-Probe
          M574 Z1 S2
          M558 P1 H5 F120 T6000
          G31 P500 X0 Y50 Z-0.45
          M557 X10:230 Y10:210 S20

          The problem is, that after homing, i have again an offset of -0.45mm.
          home Z, paper is loose, Z-0.45 per baby stepping paper fixed by the nozzle.

          Should i try a G92 Z0.45 in the homeZ/homeall.g files?

          undefined 1 Reply Last reply 16 Jan 2019, 19:06 Reply Quote 0
          • undefined
            Phaedrux Moderator @Torro
            last edited by 16 Jan 2019, 19:06

            @torro A negative trigger value would usually only apply to contact nozzle probes that actually touch the bed to trigger.

            Try G31 Z0.45.

            You should be homing Z with a G30 movement in your homeall.g. Do not use a G92 Z0.45 The G30 will determine your height.

            Z-Bot CoreXY Build | Thingiverse Profile

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            • undefined
              Torro
              last edited by 16 Jan 2019, 19:20

              seems to work thanks a lot!

              now, i have to figure out, where i need to change that (macros etc...)

              one last question (for today... 😉 )
              after G30, the bed moves to Z5.45
              why? i think i know, where .45mm comes from, but who adds 5mm more?

              1 Reply Last reply Reply Quote 0
              • undefined
                Phaedrux Moderator
                last edited by Phaedrux 16 Jan 2019, 20:25

                @torro Post your homing files.

                The extra 5 is probably your dive height from M558. After probing it returns to this height. The 0.45 is your trigger height, because that's the distance from the bed when it triggered.

                To verify your height from the bed, send the nozzle slowly to Z0 at the same XY position the G30 was done. The nozzle should stop just touching the bed.

                If the nozzle is too high or too low, adjust the Z height in small increments until it's just touching. Now you can use that value to fine tune your G31 Z offset.

                Z-Bot CoreXY Build | Thingiverse Profile

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                • undefined
                  Torro
                  last edited by 17 Jan 2019, 07:50

                  Hi,

                  this is homeall.g

                  G91 ; relative positioning
                  G1 S1 X-300 Y-300 F5000 ; move quickly to X or Y endstop and stop there (first pass)
                  G1 S1 X-206 ; home X axis
                  G1 S1 Y-300 ; home Y axis
                  G1 X5 Y5 F6000 ; go back a few mm
                  G1 S1 X-206 F360 ; move slowly to X axis endstop once more (second pass)
                  G1 S1 Y-206 ; then move slowly to Y axis endstop
                  G1 S1 Z-300 F3000 ; move Z down stopping at the endstop
                  G1 Z4 F200 ; move slowly 4mm in the +Z direction
                  G30 X120 Y110
                  G90 ; absolute positioning

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                  • undefined
                    Torro
                    last edited by 17 Jan 2019, 11:10

                    Hi,

                    i have problems to get the compensation to work.

                    i created the heightmap

                    0_1547722934640_heightmap.jpg

                    added a G92 S1 to the start script of s3d

                    M106 P0 S0 ; Stop Part Cooling Fan
                    G28 ; home all axes
                    G29 S1 ; load heightmap
                    G91 ; relative mode
                    G1 E52 F400 ; Fill Nozzle
                    G90 ; absolute Mode
                    M572 D0 S0.1 ; Pressure advance

                    and get this result:

                    0_1547722995932_image.jpg

                    you can see that it´s somehow similar. i have no idea what to do next.

                    config.g:

                    ; Drives
                    M569 P0 S1 ; Drive 0 goes forwards
                    M569 P1 S1 ; Drive 1 goes forwards
                    M569 P2 S1 ; Drive 2 goes forwards
                    M569 P3 S1 ; Drive 3 goes forwards
                    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
                    M92 X80.00 Y80.00 Z160 E420.00 ; Set steps per mm
                    M566 X900.00 Y900.00 Z12.00 E120.00 ; Set maximum instantaneous speed changes (mm/min)
                    M203 X20000.00 Y20000.00 Z4000.00 E4000.00 ; Set maximum speeds (mm/min)
                    M201 X1000.00 Y1000.00 Z1000.00 E10000.00 ; Set accelerations (mm/s^2)
                    M906 X800.00 Y800.00 Z800.00 E800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
                    M84 S300 ; Set idle timeout

                    ; Axis Limits
                    M208 X0 Y-1 Z0 S1 ; Set axis minima
                    M208 X240 Y222 Z278 S0 ; Set axis maxima

                    ; Endstops
                    M574 X1 Y1 S0 ; Set active high endstops

                    ; Z-Probe
                    M574 Z1 S2
                    M558 P1 H5 F120 T6000 A3
                    G31 P500 X0 Y50 Z0.4
                    M557 X20:220 Y70:220 S20

                    homeall.g
                    G91 ; relative positioning
                    G1 S1 X-300 Y-300 F5000 ; move quickly to X or Y endstop and stop there (first pass)
                    G1 S1 X-206 ; home X axis
                    G1 S1 Y-300 ; home Y axis
                    G1 X5 Y5 F6000 ; go back a few mm
                    G1 S1 X-206 F360 ; move slowly to X axis endstop once more (second pass)
                    G1 S1 Y-206 ; then move slowly to Y axis endstop
                    G1 S1 Z-300 F3000 ; move Z down stopping at the endstop
                    G1 Z4 F200 ; move slowly 4mm in the +Z direction
                    G90 ; absolute positioning
                    G30 X120 Y110 <- That´s NOT working it probes at X/Y min

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                    • undefined
                      aidar
                      last edited by 17 Jan 2019, 13:20

                      You better send probe to X120 Y110 by G1, so
                      G1 X120 Y110
                      G30

                      undefined 1 Reply Last reply 17 Jan 2019, 14:02 Reply Quote 0
                      • undefined
                        Torro @aidar
                        last edited by 17 Jan 2019, 14:02

                        @aidar said in Dc42 ir probe on the way:

                        You better send probe to X120 Y110 by G1, so
                        G1 X120 Y110
                        G30

                        done & works! thanks

                        i took the G29 S1 out of the start script. before starting the print, i activated the mesh per DWC "compensation&calibration". so it says "compensation in use:mesh"

                        i printed a cube with 180x180mm and observed the z motors. they stand still.

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                        • undefined
                          Torro
                          last edited by 17 Jan 2019, 16:59

                          tried this start script:

                          M106 P0 S0 ; Stop Part Cooling Fan
                          G28 ; home all axes
                          G29
                          G91 ; relative mode
                          G1 E52 F400 ; Fill Nozzle
                          G90 ; absolute Mode

                          same problem, the first layer looks like on the picture above.
                          DWC says "mesh in use"

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                          • undefined
                            aidar
                            last edited by 17 Jan 2019, 17:58

                            Well, seems we have to start from basic: what version of firmware you use?

                            1 Reply Last reply Reply Quote 0
                            • undefined
                              Torro
                              last edited by 17 Jan 2019, 18:00

                              Duet Web Control 2.0.0-RC3

                              Electronics: Duet WiFi 1.02 or later
                              Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 2.02(RTOS) (2018-12-24b1)
                              Duet WiFi Server Version: 1.22

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                              • undefined
                                Phaedrux Moderator
                                last edited by 17 Jan 2019, 18:04

                                What does a print look like with mesh disabled?

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • undefined
                                  Torro
                                  last edited by 17 Jan 2019, 18:05

                                  5 minutes please

                                  1 Reply Last reply Reply Quote 0
                                  • undefined
                                    Torro
                                    last edited by 17 Jan 2019, 18:08

                                    it´s the same. left side (Ymin) so close, that there is no layer, right side (Ymax) so far away, that the layer doesn´t stick to the bed

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                                    • undefined
                                      Phaedrux Moderator
                                      last edited by 17 Jan 2019, 18:17

                                      @torro said in Dc42 ir probe on the way:

                                      M201 X1000.00 Y1000.00 Z1000.00 E10000.00 ; Set accelerations (mm/s^2)

                                      Try reducing the Z acceleration from 1000 to 100. I wonder if it's trying to compensate but trying to move too quickly and not moving at all due to binding.

                                      Does the Z axis move properly otherwise?

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • undefined
                                        Torro
                                        last edited by 17 Jan 2019, 18:21

                                        Z axis works fine.
                                        tested with acceleration 100, same behavior

                                        undefined 1 Reply Last reply 17 Jan 2019, 18:26 Reply Quote 0
                                        • undefined
                                          aidar
                                          last edited by 17 Jan 2019, 18:25

                                          Have you tryied manual bed leveling?
                                          https://duet3d.dozuki.com/Wiki/Using_the_manual_bed_levelling_assistant

                                          undefined 1 Reply Last reply 17 Jan 2019, 18:32 Reply Quote 0
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