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G28 G-code
G28 means “seek the endstops for each axis, stop once they are found and this position is now the origin for the machine”.
This G-code is specific to Reprap and does not conform to the normal G-code standard.
Format
The command is used as such :
G28 X10 Y10
Which means : move until you hit the X and Y endstops, then set the current X position to 10 and the Y position to 10
You can also use the Gcode without any parameters :
G28
Which is equivalent to doing :
G28 X0 Y0 Z0
Parameters
| Parameter | Usage | Example |
|---|---|---|
| X | Move until you hit this endstop then set the position in this axis to this value | G28 X0 |
| Y | Move until you hit this endstop then set the position in this axis to this value | G28 Y0 |
| Z | Move until you hit this endstop then set the position in this axis to this value | G28 Z0 |
Configuration
See the Endstops module documentation.
Delta
This page assumes you are using a cartesian machine.
If you are using a Delta machine, then you can not individually home axes.
Instead, all “actuators” are homed together to the top of the machine, which sets you at the top of the Z work area, and at the center of the XY work area.
Further reading
These resources are used as references for Gcode :
