ZA and ZB connections ?


  • administrators

    @Rudy2A said in ZA and ZB connections ?:

    I spoke too quickly ... I realized that when I wanted to print large pieces the leveling of the bed did not work finally!

    Are you now using G32 to level the two sides of the bed, with the two Z motors connected to separate drivers? If so, after running G32, do you then get a level height map if you run G29 S0 ?



  • @dc42 said in ZA and ZB connections ?:

    Utilisez-vous maintenant G32 pour niveler les deux côtés du lit, avec les deux moteurs Z connectés à des pilotes séparés? Si oui, après avoir exécuté G32, obtenez-vous une carte de hauteur de niveau si vous exécutez G29 S0?

    Need details ...

    Capture d’écran 2020-01-04 à 23.37.52.png

    When I look at my height map, I see that the corner in front on the left (near the arrows XYZ) is too high! So, if I understood correctly, I must lower my bed on this side using the adjusting screw. However if I look at my test print which is in the same place, the deposit of the PLA is too high and does not really stick to 100% on my bed, which could indicate that I should assemble my bed!
    What does the grid (reference model) represent perfectly straight on my height map and what does the green part (for me) represent?



  • @dc42 said in ZA and ZB connections ?:

    Are you now using G32 to level the two sides of the bed, with the two Z motors connected to separate drivers? If so, after running G32, do you then get a level height map if you run G29 S0 ?

    Yes absolutely, I use the two separate Z pilots ... G32 then G29 ...

    But the problem is that, even if I adjust my bed in any way after doing G32 and G29, the result remains the same! It is as if the correction of my bed keeps in mind the error of the departure! Difficult to explain ! But, I find myself after the correction with the same faults (in the same place as at the start) without any correction having been made and yet I see perfectly moving the Z differently.


  • Moderator

    @Rudy2A your mesh would benefit from more points. It's fairly sparse.



  • @Phaedrux said in ZA and ZB connections ?:

    votre maillage bénéficierait de plus de points. C'est assez clairsemé.

    For the sake of understanding, I prefer to use the P of M557 than S
    M557 X11: 250 Y11: 252 P4
    What would be the P value to make it more meaningful?



  • @Rudy2A said in ZA and ZB connections ?:

    votre maillage bénéficierait de plus de points. C'est assez clairsemé.

    Par souci de compréhension, je préfère utiliser le P de M557 que S
    M557 X11: 250 Y11: 252 P4
    Quelle serait la valeur P pour la rendre plus significative?

    My bed is 300X300


  • Moderator

    Try double?



  • @Phaedrux said in ZA and ZB connections ?:

    Essayez double?

    Here, I get this result from M557 P4 to P8 ...

    Capture d’écran 2020-01-05 à 00.52.12.png

    The worst part is that by looking for solutions to my problem on the forum, I found quite a few cases similar to mine, but each time, the cases were not resolved or were not commented on final solution, it's a shame!



  • As I said a little higher ... No matter the result of my height map by making a G29S0! My first layer does not receive any correction, the impression always remains identical in all the tests (and yet the height maps are never identical) ... same defect in the same place, it is frankly annoying not to understand!



  • How are the motors connected to the leadscrews? Can you please attach a picture?



  • @DIY-O-Sphere said in ZA and ZB connections ?:

    Comment les moteurs sont-ils connectés aux vis-mères? Pouvez-vous joindre une photo?

    Like this...

    IMG_0230.JPG


  • Moderator

    Do you see the Z axis turning while it's printing?



  • @Phaedrux said in ZA and ZB connections ?:

    Voyez-vous l'axe Z tourner pendant l'impression?

    Yes absolutely, my CoreXY printer (it's my moving bed) has 2 Z axes. One Z on Za and the other on E1, I can see my Z axes turning indifferently during my print tests ...



  • @Rudy2A said in ZA and ZB connections ?:

    As I said a little higher ... No matter the result of my height map by making a G29S0! My first layer does not receive any correction, the impression always remains identical in all the tests (and yet the height maps are never identical) ... same defect in the same place, it is frankly annoying not to understand!

    can you post a picture of the first layer?



  • @Rudy2A
    I hate those types of couplers, as they behave like a spring.
    But I think that in your case, the lead screw is fixed in Z by the upper bearing.

    d2982f35-76fa-4838-b1d2-2f03f8f1a946-grafik.png



  • @Veti said in ZA and ZB connections ?:

    pouvez-vous publier une photo de la première couche?

    here is... the quality of the photography is not great, but we can clearly see where my first layer is crushed, and where it is too high!

    Whatever I do as a setting, it comes down to the same every time! it's like a model is in memory on the printer ...

    Even if I level my bed using the adjustment screws with a print in progress, I manage to have a very appreciable result ... Only, when I launch a new print test (without restarting the printer) my settings are not taken into account and we start again on a leveling of the bed almost identical to the photograph above!

    IMG_0232.jpg

    IMG_0234.jpg



  • @Rudy2A
    post the picture of the mesh grid.
    while printing check with m122 that mesh grid is active.



  • @Veti said in ZA and ZB connections ?:

    poster l'image de la grille maillée.
    lors de l'impression, vérifiez avec m122 que la grille de maillage est active

    Here is...

    Capture d’écran 2020-01-05 à 12.28.39.png



  • for a glass surface, that looks absutly terrible. there might be a problem with your probe.

    please run this macro.
    https://forum.duet3d.com/topic/6962/m48-measure-z-probe-repeatability-and-print-to-serial-output



  • @Rudy2A said in ZA and ZB connections ?:

    lors de l'impression, vérifiez avec m122 que la grille de maillage est active

    05/01/2020 à 12:46:01 M122

    === Diagnostics ===
    RepRapFirmware for Duet 2 WiFi/Ethernet version 2.05 running on Duet WiFi 1.02 or later
    Board ID: 08DGM-917DA-G4MSJ-6JTDA-3S06J-K8PHB
    Used output buffers: 3 of 24 (10 max)
    === RTOS ===
    Static ram: 25712
    Dynamic ram: 93176 of which 380 recycled
    Exception stack ram used: 520
    Never used ram: 11284
    Tasks: NETWORK(ready,628) HEAT(blocked,1232) MAIN(running,1664) IDLE(ready,160)
    Owned mutexes:
    === Platform ===
    Last reset 00:24:20 ago, cause: software
    Last software reset at 2020-01-05 12:21, reason: User, spinning module GCodes, available RAM 11260 bytes (slot 2)
    Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0441f000 BFAR 0xe000ed38 SP 0xffffffff Task 0x4e49414d
    Error status: 8
    Free file entries: 9
    SD card 0 detected, interface speed: 20.0MBytes/sec
    SD card longest block write time: 11.7ms, max retries 0
    MCU temperature: min 30.9, current 34.3, max 34.4
    Supply voltage: min 12.9, current 13.3, max 13.5, under voltage events: 0, over voltage events: 0, power good: yes
    Driver 0: ok, SG min/max 0/337
    Driver 1: ok, SG min/max 0/259
    Driver 2: ok, SG min/max 0/221
    Driver 3: ok, SG min/max 0/37
    Driver 4: ok, SG min/max 0/215
    Date/time: 2020-01-05 12:46:00
    Cache data hit count 4294967295
    Slowest loop: 76.18ms; fastest: 0.06ms
    I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
    === Move ===
    Hiccups: 0, FreeDm: 156, MinFreeDm: 152, MaxWait: 586970ms
    Bed compensation in use: mesh, comp offset 0.000
    === DDARing ===
    Scheduled moves: 316, completed moves: 313, StepErrors: 0, LaErrors: 0, Underruns: 0, 0
    === Heat ===
    Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
    Heater 0 is on, I-accum = 0.1
    Heater 1 is on, I-accum = 0.4
    === 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 X16.600 Y19.763 F2400" 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 ===
    Slowest loop: 77.95ms; fastest: 0.01ms
    Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
    HTTP sessions: 1 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 1.23
      WiFi MAC address cc:50:e3:0d:1b:4c
      WiFi Vcc 3.31, reset reason Turned on by main processor
      WiFi flash size 4194304, free heap 25432
      WiFi IP address 192.168.1.10
      WiFi signal strength -49dBm, reconnections 0, sleep mode modem
      Socket states: 0 0 0 0 0 0 0 0


  • @Veti said in ZA and ZB connections ?:

    for a glass surface, that looks absutly terrible. there might be a problem with your probe.
    please run this macro.

    M98 P"0:/macros/Répétabilité de la sonde Z"
    G32 bed probe heights: -0.144 -0.126 -0.146 -0.123 -0.118 -0.119 -0.119 -0.114 -0.114 -0.128, mean -0.125, deviation from mean 0.011


  • administrators

    @Rudy2A, you said in an earlier post that you are using the IR sensor as Z probe. That would explain your results. You won't get good results from the IR sensor on that bed, because of the white print on the black background. If you put a sheet of matt black paper between the bed plate and the glass, then you may get acceptable results.


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