how do you setup multi probe points?

  • I'm running Duet 2 1.04 wifi with Bltouch on an ender 3.

    So my current bed.g has 4 points setup like so

    ; Probe the bed at 4 points
    G30 P0 X50 Y50 H0 Z-99999 ;G30 P0 X20 Y20 H0 Z-99999
    G30 P1 X50 Y185 H0 Z-99999 ;G30 P1 X20 Y215 H0 Z-99999
    G30 P2 X185 Y185 H0 Z-99999 ;G30 P2 X215 Y215 H0 Z-99999
    G30 P3 X185 Y50 H0 Z-99999 S ;G30 P3 X215 Y20 H0 Z-99999 S
    M98 Pretractprobe.g ; retract mechanical Z probe

    how would I expand this to 16 points?

    Also on a side note the does the bed mesh limits axis limits seem right in the config.g for the ender 3?

    ; Axis Limits
    M208 X-5.5 Y-10 Z0 S1 ; Set axis minima
    M208 X258.5 Y246 Z260 S0 ; Set axis maxima

    M557 X50:185 Y50:185 S65 ; Define mesh grid

  • SO after some reading the line ((M557 X50:185 Y50:185 S65 ; Define mesh grid )) The S65 means the machine will sample 65 points from mesh grid?

  • Your bed.g has nothing to do with mesh probing. Bed.g is called by G32, but i assume you use G29 for mesh probing. So M557 comes in play here. S parameter (in your case 65) means probe points spacing, or let say measurement between probe points. So if you want more points, set it for example 20 or so.

  • The S parameter is the sample intervals in mm. In your case, your X and Y ranges are 50 to 185 (135mm intervals) so for example a spacing of 27mm will result in 5 x 5 sampling grid.

  • Thanks for the info however something is off. When I run the G29 S0 the hotend will move right taking samples and continue off the bed. Why is it doing this?

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