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screws_tilt_adjust: Add DIRECTION parameter to SCREWS_TILT_CALCULATE (#4357)

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Signed-off-by: Matthew Lloyd <github@matthewlloyd.net>
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Matthew Lloyd 2021-06-22 15:18:05 -04:00 • committed by GitHub
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9
docs/G-Codes.md
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@ -456,12 +456,13 @@ The following commands are available when the
[screws_tilt_adjust config section](Config_Reference.md#screws_tilt_adjust)
is enabled (also see the
[manual level guide](Manual_Level.md#adjusting-bed-leveling-screws-using-the-bed-probe)):
- `SCREWS_TILT_CALCULATE [<probe_parameter>=<value>]`: This command
will invoke the bed screws adjustment tool. It will command the
- `SCREWS_TILT_CALCULATE [DIRECTION=CW|CCW] [<probe_parameter>=<value>]`:
This command will invoke the bed screws adjustment tool. It will command the
nozzle to different locations (as defined in the config file)
probing the z height and calculate the number of knob turns to
adjust the bed level. See the PROBE command for details on the
optional probe parameters.
adjust the bed level. If DIRECTION is specified, the knob turns will all
be in the same direction, clockwise (CW) or counterclockwise (CCW).
See the PROBE command for details on the optional probe parameters.
IMPORTANT: You MUST always do a G28 before using this command.
## Z Tilt

20
docs/Manual_Level.md
View file

@ -163,17 +163,18 @@ screw_thread: CW-M3
```
The screw1 is always the reference point for the others, so the system
assumes that screw1 is in the correct height. Always run `G28` first
assumes that screw1 is at the correct height. Always run `G28` first
and then run `SCREWS_TILT_CALCULATE` - it should produce output
similar to:
```
Send: G28
Recv: ok
Send: SCREWS_TILT_CALCULATE
Recv: // front left screw (Base): X -5.0, Y 30.0, Z 2.48750
Recv: // front right screw : X 155.0, Y 30.0, Z 2.36000 : Adjust -> CW 01:15
Recv: // rear right screw : X 155.0, Y 190.0, Z 2.71500 : Adjust -> CCW 00:50
Recv: // read left screw : X -5.0, Y 190.0, Z 2.47250 : Adjust -> CW 00:02
Recv: // 01:20 means 1 full turn and 20 minutes, CW=clockwise, CCW=counter-clockwise
Recv: // front left screw (base) : x=-5.0, y=30.0, z=2.48750
Recv: // front right screw : x=155.0, y=30.0, z=2.36000 : adjust CW 01:15
Recv: // rear right screw : y=155.0, y=190.0, z=2.71500 : adjust CCW 00:50
Recv: // read left screw : x=-5.0, y=190.0, z=2.47250 : adjust CW 00:02
Recv: ok
```
This means that:
@ -198,3 +199,12 @@ the mesh was created. For example, `SCREWS_TILT_CALCULATE MAX_DEVIATION=0.01`
can be added to the custom start gcode of the slicer before the mesh is loaded.
It will abort the print if the configured limit is exceeded (0.01mm in this
example), giving the user a chance to adjust the screws and restart the print.
The `DIRECTION` parameter is useful if you can turn your bed adjustment
screws in one direction only. For example, you might have screws that start
tightened in their lowest (or highest) possible position, which can only be
turned in a single direction, to raise (or lower) the bed. If you can only
turn the screws clockwise, run `SCREWS_TILT_CALCULATE DIRECTION=CW`. If you can
only turn them counter-clockwise, run `SCREWS_TILT_CALCULATE DIRECTION=CCW`.
A suitable reference point will be chosen such that the bed can be leveled
by turning all the screws in the given direction.