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werid z starting printing much higher than anticipated...

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  • undefined
    otaku521
    last edited by otaku521 13 Apr 2018, 19:09

    Hi everyone here is my setup
    Board: DuetWifi @ FW:1.21
    Probe: Duet Mini IR Probe (DC42)
    independent 2 Z-axis connected on Z0 (yes jumper on Z1) and E1 (will add a third Z axis + Duex5 by next week)

    Bed: Alum Plate with silicone heat bed with painter's masking tape on top of the 3mm Alum Plate + 3mm Borosilicate Glass with a sheet of Alum Foil on Top + 2mm Black PEI sheet - Clipped with Binder Clips

    When doing Z offsets calibrations everything is all fine (found it to be Z offset @1.678) ... with "G1 Z0" the nozzle grabs the paper just fine
    did the Automatic Bed leveling and mesh it was fine too.... (I think?)

    But when printing - it always start to do my Skirt a little too high... I need to babystep down -1.35mm to actually for it to print correctly

    My workaround so far is to do a M208 Z-10 (which is a -10 Z axis so that babystep will not bounce back up again when I go below 0) and hardcode my babystep at the last line in config

    Is there a real solution to avoid this above??

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    • undefined
      otaku521
      last edited by 13 Apr 2018, 19:09

      Here is my Config:

      ; Configuration file for Duet WiFi (firmware version 1.20 or newer)
      ; executed by the firmware on start-up
      ;
      ; generated by RepRapFirmware Configuration Tool on Sat Mar 31 2018 04:48:36 GMT+0800 (China Standard Time)

      ; General preferences
      G90 ; Send absolute coordinates...
      M83 ; ...but relative extruder moves

      M667 S1 ; Select CoreXY mode

      ; Network
      M550 PTony Wong ; Set machine name
      M551 Pxxxxxxx ; Set password
      M552 S1 ; Enable network
      M587 S"xxxxxxx" P"xxxxxxx" ; Configure access point. You can delete this line once connected
      M586 P0 S1 ; Enable HTTP
      M586 P1 S0 ; Disable FTP
      M586 P2 S0 ; Disable Telnet

      ; Drives
      M569 P0 S1 ; Drive 0 goes forwards (X)
      M569 P1 S1 ; Drive 1 goes forwards (Y)
      M569 P2 S1 ; Drive 2 goes forwards (Z)
      M569 P3 S1 ; Drive 3 goes forwards (E0)
      M569 P4 S1 ; Drive 4 goes forwards (Z2)

      M584 X0 Y1 Z2:4 E3 ; Drive 0-X 1-Y Z-2&4(E1) 3-E(E0)
      M671 X-30:350 Y180:180 S10 ; leadscrews left & right (Middle of the bed in the Y axis)(S10 = 10mm Corrections allow)

      M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
      M92 X80 Y80 Z400 E415 ; Set steps per mm
      M566 X600 Y600 Z12 E120 ; Set maximum instantaneous speed changes (mm/min) (Jerk)
      M203 X6000 Y6000 Z1200 E400 ; Set maximum speeds (mm/min)
      M201 X1000 Y1000 Z1000 E250 ; Set accelerations (mm/s^2)
      M204 P1000 T1000 ; Set Max acceleration for P=printing moves and T=travel moves
      M906 X1200 Y1200 Z1300 E900 I30 ; Set motor currents (mA) and motor idle factor in per cent
      M84 S30 ; Set idle timeout

      ; Axis Limits
      M208 X0 Y0 Z-10 S1 ; Set axis min (-10 for probing and babystep in printing)
      M208 X278 Y380 Z170 S0 ; Set axis max

      ; Endstops
      M574 X1 S1 ; Set active High endstops S1 (X-MIN)
      M574 Y1 S1 ; Set active High endstops s1 (Y-MIN)

      ; Z-Probe
      M574 Z1 S2 ; Set endstops controlled by probe
      M558 P1 H6 F100 T3000 ; Set Z probe type to unmodulated and the dive height + speeds
      G31 P500 X0 Y0 Z1.678 ; Set Z probe trigger value, offset and trigger height
      M557 X30:275 Y30:375 S30 ; Define mesh grid

      ; Heaters
      ;BED
      M305 P0 T100000 B3950 C0 R4700 ; Set thermistor + ADC parameters for heater 0
      M143 H0 S120 ; Set temperature limit for heater 0 to 120C
      M307 H0 A203.7 C745.2 D2.6 B0 ; SET BED TO PID MODE

      ;EXTRUDER 1
      M305 P1 T100000 B3950 C0 R4700 ; Set thermistor + ADC parameters for heater 1
      M143 H1 S280 ; Set temperature limit for heater 1 to 280C
      M307 H1 A324.6 C134.8 D3.7 B0 ; SET EXTRUDER 1 TO PID MODE

      ; Fans
      M106 P0 S0.1 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
      M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
      M106 P2 S1 I0 F500 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

      ; Tools
      M563 P0 D0 H1 ; Define tool 0
      G10 P0 X12 Y0 Z0 ; Set tool 0 axis offsets
      G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

      ; Automatic saving after power loss is not enabled

      ; Custom settings are not configured

      ; Miscellaneous
      M501 ; Load saved parameters from non-volatile memory
      T0 ; Select first tool
      M581 E1:2 S0 T3 C1 ; FILAMENT RUNOUT SENSOR TO TRIGGER"3"
      M290 R0 S0 ; Clear All baby step setting from memory (so it restarts for next print it will clear all prev babysteps)
      M290 R0 S-1.0 ; Default baby Step with PEI Sheet (2mm) to start with-1 mm (cannot be over 1 for some reason)
      M290 R1 S-0.35 ; Add baby step -0.35mm closer to bed (R1 add on top of Previous step)

      config-override:

      ; This is a system-generated file - do not edit
      ; Heater model parameters
      M307 H0 A126.6 C383.2 D1.0 S1.00 V24.3 B0
      M307 H1 A808.5 C200.0 D11.3 S1.00 V24.3 B0
      M307 H2 A340.0 C140.0 D5.5 S1.00 V0.0 B0
      M307 H3 A340.0 C140.0 D5.5 S1.00 V0.0 B0
      M307 H4 A340.0 C140.0 D5.5 S1.00 V0.0 B0
      M307 H5 A340.0 C140.0 D5.5 S1.00 V0.0 B0
      M307 H6 A340.0 C140.0 D5.5 S1.00 V0.0 B0
      M307 H7 A340.0 C140.0 D5.5 S1.00 V0.0 B0

      1 Reply Last reply Reply Quote 0
      • undefined
        otaku521
        last edited by otaku521 13 Apr 2018, 19:09

        Bed.g:
        ; bed.g
        ; called to perform automatic bed compensation via G32
        ;
        ; generated by RepRapFirmware Configuration Tool on Sat Mar 31 2018 04:48:36 GMT+0800 (China Standard Time)
        M561 ; clear any bed transform
        G28 ; home all axes

        ;Doing 2 Axis sync

        G30 P0 X15 Y180 Z-99999 ; probe near a leadscrew (Z1)
        G30 P1 X275 Y180 Z-99999 ; probe near a leadscrew (Z2/E1)

        ; Probe the bed at 5 points

        G30 P2 X30 Y20 Z-99999
        G30 P3 X30 Y335 Z-99999
        G30 P4 X260 Y335 Z-99999
        G30 P5 X260 Y20 Z-99999
        G30 P6 X150 Y200 Z-99999 S2 ; and calibrate 2 motors (S2)

        Macro - Axis Sync and Mesh Compensation:

        M561 ; clear any bed transform
        G28 ; home all axes

        ;Doing 2 Axis sync

        G30 P0 X15 Y180 Z-99999 ; probe near a leadscrew (Z1)
        G30 P1 X275 Y180 Z-99999 ; probe near a leadscrew (Z2/E1)

        ; Probe the bed at 9 points

        G30 P2 X30 Y20 Z-99999
        G30 P3 X30 Y330 Z-99999
        G30 P4 X100 Y180 Z-99999
        G30 P5 X30 Y335 Z-99999
        G30 P6 X150 Y300 Z-99999
        G30 P7 X260 Y335 Z-99999
        G30 P8 X200 Y200 Z-99999
        G30 P9 X260 Y20 Z-99999
        G30 P10 X150 Y200 Z-99999 S2 ; and calibrate 2 Z motors (S2)

        ; Mesh Bed Leveling and save data to be use for printing later on via G29 S1
        M557 X30:278 Y30:350 S40 ; Define the point grid for measuring the bed
        G29 S0 ; Run Probing Sequence define by M557 above
        M374

        Simplied3D Start Script:
        M582 T3 ; FILAMENT RUNOUT SENSOR TURN ON
        G28 ; home all axes
        M106 P1 S0 ; Turn off Parts Fans

        Simplied3D End Script:
        ; FILAMENT BACK OFF START
        M120
        M83
        G1 E-10 F9000
        M121
        ; FILAMENT BACK OFF END

        M104 S0 ; turn off extruder
        M140 S0 ; turn off bed
        G91 ; relative mode
        G1 Z5 ; lift 5mm
        G90 ; absolute mode
        M84 ; disable motors
        M106 S0 ; stop bed fan
        M108 S0 ; stop extruder and electronics fans

        1 Reply Last reply Reply Quote 0
        • undefined
          otaku521
          last edited by 13 Apr 2018, 19:15

          M122
          === Diagnostics ===
          Used output buffers: 3 of 32 (13 max)
          === Platform ===
          RepRapFirmware for Duet 2 WiFi/Ethernet version 1.21 running on Duet WiFi 1.02 or later
          Board ID: xxxxxxxxxxxxxxxxxxxx
          Static ram used: 16152
          Dynamic ram used: 100648
          Recycled dynamic ram: 1984
          Stack ram used: 1224 current, 6504 maximum
          Never used ram: 5784
          Last reset 05:23:42 ago, cause: power up
          Last software reset at 2018-04-13 14:39, reason: User, spinning module GCodes, available RAM 7760 bytes (slot 3)
          Software reset code 0x0003 HFSR 0x00000000, CFSR 0x00000000, ICSR 0x0441f000, BFAR 0xe000ed38, SP 0xffffffff
          Error status: 0
          Free file entries: 9
          SD card 0 detected, interface speed: 20.0MBytes/sec
          SD card longest block write time: 170.2ms
          MCU temperature: min 32.8, current 48.2, max 49.7
          Supply voltage: min 24.1, current 24.2, max 25.3, under voltage events: 0, over voltage events: 0
          Driver 0: ok, SG min/max 0/75
          Driver 1: ok, SG min/max 0/16
          Driver 2: ok, SG min/max 0/1023
          Driver 3: ok, SG min/max not available
          Driver 4: ok, SG min/max 0/365
          Date/time: 2018-04-14 03:14:00
          Slowest main loop (seconds): 1.256110; fastest: 0.000046
          === Move ===
          MaxReps: 4, StepErrors: 0, LaErrors: 0, FreeDm: 129, MinFreeDm 120, MaxWait: 3092251824ms, Underruns: 0, 2
          Scheduled moves: 233458, completed moves: 233428
          Bed compensation in use: mesh
          Bed probe heights: -0.850 -1.028 -1.423 -0.223 -0.308
          === Heat ===
          Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
          Heater 0 is on, I-accum = 0.3
          Heater 1 is on, I-accum = 0.3
          === GCodes ===
          Segments left: 1
          Stack records: 2 allocated, 0 in use
          Movement lock held by null
          http is idle in state(s) 0
          telnet is idle in state(s) 0
          file is doing "G1 X207.709 Y205.763 E29.1859" in state(s) 0
          serial is idle in state(s) 0
          aux is idle in state(s) 0
          daemon is idle in state(s) 0
          queue is idle in state(s) 0
          autopause is idle in state(s) 0
          Code queue is empty.
          === Network ===
          Responder states: HTTP(1) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
          HTTP sessions: 2 of 8

          • WiFi -
            Network state is running
            WiFi module is connected to access point
            Failed messages: pending 0, notready 0, noresp 0
            WiFi firmware version 1.21
            WiFi MAC address xxxxxxxxxxxxx
            WiFi Vcc 3.33, reset reason Turned on by main processor
            WiFi flash size 4194304, free heap 13992
            WiFi IP address 192.168.10.22
            WiFi signal strength -56dBm, reconnections 0, sleep mode modem
            Socket states: 2 0 0 0 0 0 0 0
            === Expansion ===
          1 Reply Last reply Reply Quote 0
          • undefined
            otaku521
            last edited by 13 Apr 2018, 19:34

            0_1523648032756_68549FFD-5D9B-4B7E-8220-F75DD860A511.jpeg
            Here is a photo of my HEVO

            1 Reply Last reply Reply Quote 0
            • undefined
              T3P3Tony administrators
              last edited by 14 Apr 2018, 08:29

              To confirm. When you command the printer to go to
              G1 Z0
              Its at a perfect Z0 (by paper feeler gauge)

              But when you start a print you have to use -1.35mm of baby stepping to get it to the right height?

              Can you post the first bit of a gcode file that you have tried to print that shows this issue please.

              www.duet3d.com

              undefined 2 Replies Last reply 14 Apr 2018, 14:49 Reply Quote 0
              • undefined
                dc42 administrators
                last edited by 14 Apr 2018, 09:00

                Does your slicer start GCode include a G28 homing command, and if so it that altering the Z=0 position?

                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

                undefined 1 Reply Last reply 14 Apr 2018, 14:47 Reply Quote 0
                • undefined
                  otaku521 @dc42
                  last edited by 14 Apr 2018, 14:47

                  @dc42 Yes it does a home before print... is this the problem?? if so I take it out!

                  1 Reply Last reply Reply Quote 0
                  • undefined
                    otaku521 @T3P3Tony
                    last edited by 14 Apr 2018, 14:49

                    @t3p3tony

                    Here is the gfile for the above print... (first couple of lines) (using S3D as Slicer)

                    G90
                    M82
                    M106 S0
                    M140 S85
                    M190 S85
                    M104 S235 T0
                    M109 S235 T0
                    M582 T3 ; FILAMENT RUNOUT SENSOR TURN ON
                    G28 ; home all axes <<<<< @dc42 is this the problem???
                    M106 P1 S0 ; Turn off Parts Fans
                    G92 E0
                    G1 E-0.6000 F6000
                    G1 Z0.250 F1200
                    ; process Process1
                    ; layer 1, Z = 0.250
                    T0
                    ; tool H0.250 W0.600
                    ; skirt
                    G1 X51.471 Y88.911 F3000
                    G1 E0.0000 F1800
                    G92 E0
                    G1 X52.456 Y88.293 E0.0711 F600
                    G1 X52.557 Y88.237 E0.0781
                    G1 X53.155 Y87.948 E0.1188

                    1 Reply Last reply Reply Quote 0
                    • undefined
                      otaku521 @T3P3Tony
                      last edited by 14 Apr 2018, 14:54

                      @t3p3tony
                      Yes when I go G1 Z0 it is a good paper feeler grip (like typical feel when I do paper feeler)
                      then start print i have to use -1.35mm baby step... this IMHO doesn't make sense...
                      if it was +/-0.2-0.3 maybe... but -1.35mm made me think there is something really wrong ... but I have no idea what

                      undefined 1 Reply Last reply 14 Apr 2018, 16:23 Reply Quote 0
                      • undefined
                        T3P3Tony administrators @otaku521
                        last edited by 14 Apr 2018, 16:23

                        @otaku521 if you do a G28 and then G1 Z0, how far above the bed is the nozzle? Is it paper feeler close or~1.35mm above. If it is the latter then you need to adjust oyur config so that it is.

                        I think is sensible to have a home command in your start gcode.

                        www.duet3d.com

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          otaku521
                          last edited by 14 Apr 2018, 16:35

                          @t3p3tony
                          It is after g28 before print it is paper feeler close
                          But when start print and re home again it is higher than anticipated

                          Thus I have to do baby step that large (which results me to perminate to add it in my config file for now on

                          The bottom of the mini ir sensor there is enough gap that I can see the hex of the nozzle to the tip

                          Maybe g28 is running too fast on z to get an inaccurate reading?

                          Note that i am using a 2mm black PEI sheet like I mentioned above

                          undefined 1 Reply Last reply 15 Apr 2018, 10:13 Reply Quote 0
                          • undefined
                            otaku521
                            last edited by 15 Apr 2018, 09:21

                            I have uploaded the video for your reference...

                            https://youtu.be/p8XtWKYzo_I

                            1 Reply Last reply Reply Quote 0
                            • undefined
                              T3P3Tony administrators @otaku521
                              last edited by 15 Apr 2018, 10:13

                              @otaku521 g28 should produce the same results no matter if it is run from the command line or from a gcode file. Can you test it multiple times from the command line to assure repeatability.

                              www.duet3d.com

                              1 Reply Last reply Reply Quote 0
                              • undefined
                                otaku521
                                last edited by 15 Apr 2018, 11:23

                                I know... this is why it is weird....
                                so far I am wondering if my config and other scripts are fine ?

                                undefined 1 Reply Last reply 15 Apr 2018, 13:01 Reply Quote 0
                                • undefined
                                  BPisLife @otaku521
                                  last edited by 15 Apr 2018, 13:01

                                  @otaku521 Sorry if you already mentioned this, but I was having an strange issue like this to and it turns out my slicer (simplify3D) was setting the Z to be .18 for the first layer. If my z=0 was tuned to approx. .1mm off the bed, then it would be .28mm off the bed and the print wouldn't adhere.

                                  Just a thought, check out your gcode for the first layer and see what it sets Z to, then manually move the Z to the point it says after printing and you may see the gap. If so, then you need to either A adjust your slicer or your leveling. This is of course only assuming you are seeing what I am describing here.

                                  undefined 1 Reply Last reply 15 Apr 2018, 13:31 Reply Quote 0
                                  • undefined
                                    otaku521 @BPisLife
                                    last edited by 15 Apr 2018, 13:31

                                    @bpislife you are 0.1-0.2xx off.. while I am 1.xx off... this made me think otherwise....
                                    the only thing is I think is the 2mm PEI sheet on the bed not being correctly read by mini IR probe... so I am thinking of switching back to BL Touch and see

                                    1 Reply Last reply Reply Quote 0
                                    • undefined
                                      T3P3Tony administrators
                                      last edited by T3P3Tony 15 Apr 2018, 13:48

                                      If the PEI sheet was not being recognised l would expect that to happen either way. I just had a thought though. Are you probing the bed in your prints but not when doing a normal test of G28?

                                      www.duet3d.com

                                      undefined 1 Reply Last reply 16 Apr 2018, 12:04 Reply Quote 0
                                      • undefined
                                        SputnikOC3d
                                        last edited by 16 Apr 2018, 06:38

                                        I have the same issues and have been plagued by it since day one. I cannot resolve ... I initially chalked it up to inconsistency of the BL Touch, but the more I deal with the issue it seems to be some arbitrary value created by the firmware.

                                        I have to babystep in EVERY print - using a 5-6 perimeter skirt - and hope I can step it in in time before the actual part starts. Circles are particularly ominous to get right ... in time.

                                        If I dont get adhesion - then I get Elephants Foot [ alot ] as I err on the side of sticking this mother down.

                                        all this to say ... youre not alone.

                                        undefined 1 Reply Last reply 16 Apr 2018, 12:09 Reply Quote 0
                                        • undefined
                                          otaku521 @T3P3Tony
                                          last edited by 16 Apr 2018, 12:04

                                          @t3p3tony
                                          No... I only probe when everytime I start the machine doing my Macro above which calibrate my leadscrews (from 2... now 3 (just installed a Duex5) and then I do some prints from there on... but I don't start script all my prints to go calibration at the beginning since I got the Mini IR Probe (Switching out the BL touch)... (which was "PITA"...)

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