Scanning Z Probe Max points?

charliedrums

So I have a scanning z probe on a duet 3 6hc on FW 3.5.3. A bed that is 24 x 24in and I was wondering what is the maximum amount of points I can configure the probe to read? I have it set to 900 points. Can I go higher than 900?

M557 X29:609 Y40:603 P30:30

I was reading the wiki under M557 but it states "There is a firmware-dependent maximum number of probe points supported. Currently this is 441 for the Duet 2 and Duet 3 (enough for a 21x21 grid), and 121 on the Duet 06/085 (enough for a 11x11 grid)."

jay_s_uk

@charliedrums IIRC the max number of points is something like 991 for the scanning probe. But if you set a much denser mesh, RRF will complain and tell you what the maximum number of points you are allowed anyway.

@droftarts the max number of scanning points needs to be added to M557. I couldn't find it anywhere

droftarts

@charliedrums It's 961 points on 6HC in RRF 3.5, ie a 31 x 31 grid. See https://docs.duet3d.com/User_manual/RepRapFirmware/RepRapFirmware_overview#firmware-configuration-limits

You can also check by opening the 'Object Model' plugin in DWC, and checking the 'limits' section.

@jay_s_uk I'll update M557.

Ian

charliedrums

@droftarts Thanks for the reply. I'll switch it to a 31x31 then.