What G92 means
G92 is often seen as G92 E0, which tells the firmware to call the current extruder position zero. Slicers use this to keep absolute E values manageable or to reset extrusion around print phases. The nozzle and extruder do not move merely because the coordinate label changes.
When G92 includes X, Y or Z, later absolute moves are interpreted through the new offset. This can be useful in controlled workflows but is easy to misunderstand in a viewer: treating G92 as a move creates a false line, while ignoring the offset displaces every path that follows.
Syntax and parameters
G92 [X<position>] [Y<position>] [Z<position>] [E<position>]X / Y / ZNew logical coordinate for the current physical axis position.
ENew logical extruder position; G92 E0 is the most common slicer form.
Practical examples
Reset the extruder coordinate
G92 E0Calls the current extruder position zero without pushing or retracting filament.
Create a temporary XY frame
G92 X0 Y0
G1 X20 Y0The next absolute move ends 20 units from the physical point that was relabeled X0 Y0.
Firmware context
| System | Status | What changes |
|---|---|---|
| Marlin | Common | Sets logical axis or extruder positions subject to configured software-endstop behavior. |
| Klipper | Common | Commonly used for E resets; macros may prefer save/restore state helpers. |
| RepRapFirmware | Common | Supported with firmware-specific coordinate and tool semantics. |
| CNC controllers | Check dialect | G92 commonly establishes coordinate offsets, with persistence and reset commands varying by controller. |
What this viewer can show
The viewer treats G92 as a frame change, not a move. XYZ offsets and E resets are carried into later path and filament calculations.
Common mistakes
- G92 does not home an axis and does not verify physical position.
- An unnoticed XYZ offset can make later absolute coordinates appear shifted.
- Reset or replace offsets deliberately; persistence rules differ between printer and CNC firmware.
Primary sources
This page is an original explanation, reviewed against the firmware documentation below. Always confirm commands against the firmware and configuration on the machine that will execute them.