Bed Tramming menu - mriscoc/Ender3S1-Standard GitHub Wiki

Manual leveling menu, allows to level the corners to get nozzle (X) and bed (Y) have parallels movements to each other.

The corners leveling is semi-assisted, the printer does a z-home and moves the CRTouch over the leveling point then does a metering taking the relative distance between the corner and Z=0, the result of this relative height is showed in the display. You can adjust the leveling knobs until the values are similar in the four corners, they don't need to be zero because when the bed is warped (most of them are concave, see Fig 1), the corners are always higher than the center z=0 that is taken as reference. A slight difference between the corner heights of about 0,05 mm is enough.

Fig 1. Warped bed as seen with the Octoprint plugin Bed visualizer.

Note1: If your CRTouch doesn't go to some points, you have unreachable points because your probe/home offsets and/or physical dimensions, try to increase the probe margin in the probe settings menu. For example, the points at right are reachable positions if:

Max X position (248) + Probe X Offset (-42) > Bed X size (230) - Probe Margin (30)

Note2: Now there are new ways to do the first bed leveling (leveling bed corners) selecting a 2x2 mesh and see the results on the mesh viewer, you will be able to adjust the knobs and redo the 2x2 mesh until the four values are similar. Finally, if you have a terminal (Octoprint or Pronterface) you can use the g-code G35 and the printer will tell you how to move the knobs