Here is the result for M122:

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.0(RTOS) running on Duet Ethernet 1.02 or later
Board ID: 08DGM-9T6BU-FG3S0-7JTDD-3SD6Q-1V5MF
Used output buffers: 1 of 20 (6 max)
=== RTOS ===
Static ram: 28380
Dynamic ram: 95724 of which 0 recycled
Exception stack ram used: 284
Never used ram: 6684
Task NETWORK ready, free stack 396
Task HEAT blocked, free stack 1256
Task MAIN running, free stack 3568

@dc42, I will check the "Never used RAM" soon. For my current application I will probably need about 20.000 points.

This one of my first results. The lower strukture was generated on the printer and then rotaded 90° in the longitudinal axis. I scanned the surface with the mesh probe as mentioned above and then printed a plane x-y-surface.

Currently I create the buildplate myself. For this I am using a cnc or my printer. Therefore the CAD is available.
You suggest that I use G29 S1 P"filename" to load the CAD-File, is that correct?

I want to print on an intentionally uneven bed. At first I wanted to try small bumps in a like wave pattern. To prevent the nozzle from crashing in the surface I need a higher resolution for the mesh bed. With the available number of probe pointsand my setting I can only print up to 8 cm. What I need is a length up to 50 cm.

M557 X100:180 Y20:25 S2:5

I hoped to make it work with the bed.g and a high number of G30-orders but the number of indices is limited.

Hello everbody,
I was wondering if there is a plan to increase the number of probe points for the Duet 2 Ethernet or in general (currently max 441)? I would need a much higher number for my specific application.
Best regards.