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docs: update BED_MESH_OFFSET description

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Add the ZFADE parameter to the documentation.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>
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Eric Callahan 2024-02-06 11:19:03 -05:00 • committed by KevinOConnor
parent 0cd16e956d
commit 0aaabf1904
2 changed files with 17 additions and 7 deletions
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14
docs/Bed_Mesh.md
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@ -542,11 +542,19 @@ This gcode may be used to clear the internal mesh state.
### Apply X/Y offsets
`BED_MESH_OFFSET [X=<value>] [Y=<value>]`
`BED_MESH_OFFSET [X=<value>] [Y=<value>] [ZFADE=<value>]`
This is useful for printers with multiple independent extruders, as an offset
is necessary to produce correct Z adjustment after a tool change. Offsets
should be specified relative to the primary extruder. That is, a positive
X offset should be specified if the secondary extruder is mounted to the
right of the primary extruder, and a positive Y offset should be specified
if the secondary extruder is mounted "behind" the primary extruder.
right of the primary extruder, a positive Y offset should be specified
if the secondary extruder is mounted "behind" the primary extruder, and
a positive ZFADE offset should be specified if the secondary extruder's
nozzle is above the primary extruder's.
Note that a ZFADE offset does *NOT* directly apply additional adjustment. It
is intended to compensate for a `gcode offset` when [mesh fade](#mesh-fade)
is enabled. For example, if a secondary extruder is higher than the primary
and needs a negative gcode offset, ie: `SET_GCODE_OFFSET Z=-.2`, it can be
accounted for in `bed_mesh` with `BED_MESH_OFFSET ZFADE=.2`.