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misc improvements on homing and feedrate #543

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@petaflot petaflot commented Feb 9, 2024

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_gcode/G028.md Outdated
@@ -6,7 +6,7 @@ author: thinkyhead

group: calibration

codes: [ G28 ]
codes: [ G28, G34 ]
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Why was G34 added here? This is the G28 page, so it should be G28.

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petaflot commented Feb 9, 2024

because G34 does G28 before it does anything else, and therefore an additional G28 is not needed. see also HOME_AFTER_G34

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because G34 does G28 before it does anything else, and therefore an additional G28 is not needed. see also HOME_AFTER_G34

You changed the codes: line in G028.md to include G34, but it should only be G28.

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my bad. this should be better

@@ -7,6 +7,7 @@ author: thinkyhead
group: calibration

codes: [ G28 ]
related: [ G34 ]
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@thisiskeithb thisiskeithb Feb 10, 2024

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Lots of features will home if needed, so I’m not sure adding G34 here makes sense.

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ok

@@ -38,4 +38,4 @@ example:

---

Align multiple Z stepper motors using a bed probe by probing one position per stepper. See [`M422`](/docs/gcode/M422.html) for Z-Stepper automatic alignment parameter selection.
Align multiple Z stepper motors using a bed probe by probing one position per stepper. See [`M422`](/docs/gcode/M422.html) for Z-Stepper automatic alignment parameter selection. `G28` is done beforehand and is implicit. Also see `HOME_AFTER_G34` in `Configuration_adv.h`
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G28 is only done if needed/axis positions are unknown, so this isn’t exactly correct.

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I now see the comment in G28: Homing is required before [G29](https://marlinfw.org/docs/gcode/G029.html), [M48](https://marlinfw.org/docs/gcode/M048.html), and some other procedures.

IMHO it would be worth it to figure out which procedures auto-home if required pr prefer to fail first, maybe standardize this

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