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Its goal is to allow the best features of the previous leveling schemes to be used together and combined, as well as providing a richer set of commands and feedback for the user. UBL is a superset of previous automatic leveling systems, but it does not necessarily supersede them in all cases. Note that operation without an LCD is still work-in-progress, and subject to change. See the no-lcd addendum for information on using UBL without a display, and the no-z-probe addendum to get UBL working without a z-probe installed. The main documentation below assumes that a conforming LCD and a z-probe are present. Note that the MKS TFT 2.8 and 3.2 do not actually fulfill the LCD requirements. Really good first layer adhesion and height can be achieved over the entire bed.Ĭurrently an LCD display with a rotary encoder is recommended. The user is able to modify the mesh based on print results. It allows the user to fine tune the system.This allows the entire bed to be compensated. The user is able to fill in the portions of the mesh that can’t be reached by automated probing.
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It is possible to probe and store a high-resolution rectangular mesh in nonvolatile storage, load this mesh, and use either 3-point or grid based probing to ‘tilt’ the mesh and compensate for slight changes in bed orientation.UBL highly optimizes this boundary-splitting with pre-calculation, optimized handling of special cases, and avoiding recursion. For all mesh-based leveling methods, on Cartesians each linear move is split on grid line boundaries, respecting the best-known measured heights on the bed. The main improvements over the previous systems are: The Unified Bed Leveling (UBL) system is a superset of the previous leveling systems. See also G26 Mesh Validation and G29 for UBL.A comprehensive LCD menu system for UBL is coming soon.This page is a work in progress, based on Marlin 1.1.x.