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M851: XYZ Probe Offset

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  • Описание
    Set the XYZ distance from the nozzle to the probe trigger-point.
    • The easiest way to get the Z offset value is to:
    • Home the Z axis.
    • Raise Z and deploy the probe.
    • Move Z down slowly until the probe triggers.
    • Take the current Z value and negate it. (5.2 => -5.2)
    • Set with M851 Z-5.2 and #define Z_PROBE_OFFSET_FROM_EXTRUDER -5.2.
    For X and Y you have to measure the distance.
    The default (factory) values are set by
    • (version 1.x)
    • (version 2.x)
    and are integer values.
    X offset: -left +right [of the nozzle]
    Y offset: -front +behind [the nozzle]
    Z offset: -below +above [the nozzle]
    +-- BACK ---+
    | |
    L | (+) P | R <-- probe (20,20)
    E | | I
    F | (-) N (+) | G <-- nozzle (10,10)
    T | | H
    | (-) | T
    | |
    O-- FRONT --+

    M851 [X<linear>] [Y<linear>] [Z<linear>]
    Z probe X offset
    Z probe Y offset
    Z probe Z offset
    Set a reasonable offset for an inductive probe
    M851 Z-2.0
    A probe that is triggered by the nozzle itself
    M851 Z1.2
    Set the XY distance (probe left front of nozzle)
    M851 X-1.70 Y-1.30
    Set the XY distance (probe right back of nozzle)
    M851 X0.20 Y.40
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