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-rw-r--r--docs/G-Codes.md17
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diff --git a/docs/G-Codes.md b/docs/G-Codes.md
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--- a/docs/G-Codes.md
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@@ -118,6 +118,23 @@ The following standard commands are supported:
- `STEPPER_BUZZ STEPPER=<config_name>`: Move the given stepper forward
one mm and then backward one mm, repeated 10 times. This is a
diagnostic tool to help verify stepper connectivity.
+- `MANUAL_PROBE [SPEED=<speed>]`: Run a helper script useful for
+ measuring the height of the nozzle at a given location. If SPEED is
+ specified, it sets the speed of TESTZ commands (the default is
+ 5mm/s). During a manual probe, the following additional commands are
+ available:
+ - `ACCEPT`: This command accepts the current Z position and
+ concludes the manual probing tool.
+ - `ABORT`: This command terminates the manual probing tool.
+ - `TESTZ Z=<value>`: This command moves the nozzle up or down by the
+ amount specified in "value". For example, `TESTZ Z=-.1` would move
+ the nozzle down .1mm while `TESTZ Z=.1` would move the nozzle up
+ .1mm. The value may also be `+`, `-`, `++`, or `--` to move the
+ nozzle up or down an amount relative to previous attempts.
+- `Z_ENDSTOP_CALIBRATE [SPEED=<speed>]`: Run a helper script useful
+ for calibrating a Z position_endstop config setting. See the
+ MANUAL_PROBE command for details on the parameters and the
+ additional commands available while the tool is active.
- `RESTART`: This will cause the host software to reload its config
and perform an internal reset. This command will not clear error
state from the micro-controller (see FIRMWARE_RESTART) nor will it