Delta Calibration



  • Hi, i'm a happy owner of a duet wifi, i recently assembled a delta printer drawn by myself. Now i'm trying to understand what is the best way to do auto delta calibration. i have a BlTouch, but i don't understand what is the best combination of point to probe and number of calibration factor. Now i try with 9 factor, 12 calibration peripheral poins and 3 halfway points, but reading the results with M665 and M666 command i think the error is to hight (i built a twin printer for friend running Mk4Duo and his valure are closest to the base value) so i ask you what is the best combination of points and factor. After that i had printed a hexagon of 80mm i check an error of about 0.2-0.3mm per side.

    Many thanks to all!


  • administrators

    It's usually best to use either 6-factor calibration, or 8-factor if you think that bed tilt is an issue on your printer.

    More probe points will give you a worse reported deviation, but better actual results when your prints use most of the bed area. Using fewer points may give you apparently lower deviation, but in minimising the height errors at the points you probed, it may have shifted the worst errors to areas that you didn't probe.



  • Many thanks! So the best is try to a lot of point and 6 factor. Is a good praticse check step/mm of xyz motor with adigital gaude? I do thant in the cartesian printer.
    Thanks!


  • administrators

    @samu_87 said in Delta Calibration:

    Is a good praticse check step/mm of xyz motor with adigital gaude? I do thant in the cartesian printer.

    That should not be necessary, but you can check it by measuring the heights of tall prints.



  • I made the delta auto calibration with 13 points and 6 factor, now I have to print a grid with squares of a fixed size, right? to make sure the roads are the correct length. In case how is the value corrected?


  • administrators

    A small XY scaling error that is consistent across the bed (so that straight lines in the grid really are straight) can be corrected using the M579 command.


 

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