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safe_z_home: Hop only if necessary and add option to move xy back

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Once a hop is performed, it will only be re-issued if the z-axis has been
moved in the meantime. Usually it is only moved by a z-homing so doing so
will cause safe_z_home to do the hop on the next homing action.

When z-axis is homed, x and y positions are known. When setting this
boolean option, these are set back to their last positions.

Whenever a hop is specified it is re-issued after the Z axis has been
homed. This is especially necessary when a pressure-based probe is used.
Also, the module decides if a hop is necessary, based on either a known
Z position or a flag that is set whenever the motors are disabled.

Signed-off-by: Nils Friedchen <Nils.Friedchen@googlemail.com>
This commit is contained in:
Master92
2019-09-18 15:37:33 +02:00
committed by KevinOConnor
parent 80775faa09
commit 3a37d4a208
3 changed files with 47 additions and 16 deletions
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docs/Config_Changes.md
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@@ -6,6 +6,10 @@ All dates in this document are approximate.
# Changes
20190918: The zhop option in [safe_z_homing] is always re-applied
after Z axis homing completed. This might need users to update custom
scripts based on this module.
20190806: The SET_NEOPIXEL command has been renamed to SET_LED.
20190726: The mcp4728 digital-to-analog code has changed. The default