Diagonal rod length impact on Z dimension



  • Hello everyone,

    I've always considered that the diagonal rod length only modifies the XY dimensions while the Z dimensions is impact with the steps/mm. While calibrating the diagonal rod lenght, I've notice that my Z dimensions is not accurate anymore.

    Can someone confirm (or not) that the diagonal rod length only modifies the XY dimensions ?

    NB : I want to have it as close as possible before using the M579 command.

    Thank you !
    Axel.



  • what factor compensation did you use to calibrate the delta?


  • administrators

    @AV13091 said in Diagonal rod length impact on Z dimension:

    I've always considered that the diagonal rod length only modifies the XY dimensions while the Z dimensions is impact with the steps/mm.

    That's correct.

    While calibrating the diagonal rod lenght, I've notice that my Z dimensions is not accurate anymore.

    I can't think of a reason for that. How far off is the Z measurement?



  • @Veti
    Thanks for your answer,
    That's the idea, i don't use any compensation tools, i'm targeting an exact value (as close as possible) before using any compensations.



  • @AV13091
    i am talking about
    https://duet3d.dozuki.com/Wiki/Calibrating_a_delta_printer
    section Setting up the bed.g file
    which factor of those are you using.
    if you have not run the delta calibration, then you really have to.



  • @dc42
    Thanks for your answer,
    it's not that huge (49.5mm instead of 50mm). What bothers me is that I had an exact 50mm before troubleshooting the diagonal rod.
    I wasn't sure about its impact on the Z dimension as I always took for granted that the diagonal rod only affects the X and Y dimensions.

    Anyway, now that i'm sure about this, I will take care of the rest (my belts are quite old and could be too loose).

    Again, thanks for your help.

    Axel.



  • @Veti
    Okay, I understand now, I'm using a classic S6 factor :).
    I will for sure run a delta calibration but I would like to approach the real values first (effector's tilt, and other problems can give bad results).


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