How do you change/save updated Z offset without calibrating?

brent113 · April 1, 2021, 2:58pm

It’s not, it uses another method tied into the HMI handling process. It doesn’t use gcode at all, the touchscreen has a special z offset variable.

github.com

Snapmaker/Snapmaker2-Controller/blob/97caac454fbeab387900077243a8b77707844b0e/snapmaker/src/service/bed_level.cpp#L370


      
            event.data = buffer;
            event.length = 2;
          
            buffer[0] = 0;
            buffer[1] = index;
          
            return hmi.Send(event);
          }
          
          
          ErrCode BedLevelService::UpdateLiveZOffset(float offset) {
            if (MODULE_TOOLHEAD_3DP != ModuleBase::toolhead()) {
              LOG_E("only enable z offset for 3DP!\n");
              return E_FAILURE;
            }
          
            if (offset < LIVE_Z_OFFSET_MIN || offset > LIVE_Z_OFFSET_MAX) {
              LOG_E("offset is out of range: %.2f\n", offset);
              return E_PARAM;
            }

G1029 D directly modifies the z_values[i][j] store containing the mesh offsets, in abl.cpp via the compensate_offset function

BedLevelService::UpdateLiveZOffset is dispatched from SystemService::ChangeRuntimeEnv, which itself is an event callback registered to the touchscreen and handled by DispatchEvent called in the main system loop.

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How do you change/save updated Z offset without calibrating?

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