# Extruder active when z axis moves

**URL:** <https://klipper.discourse.group/t/extruder-active-when-z-axis-moves/20743>\
**Category:** General Discussion\
**Created:** [December 16, 2024, 11:26pm UTC](https://klipper.discourse.group/t/extruder-active-when-z-axis-moves/20743 "2024-12-16T23:26:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rba](https://avatars.discourse-cdn.com/v4/letter/r/839c29/32.png) [@rba](https://klipper.discourse.group/u/rba)\
**Post date:** [December 16, 2024, 11:26pm UTC](https://klipper.discourse.group/t/extruder-active-when-z-axis-moves/20743/1 "2024-12-16T23:26:54Z")

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### Basic Information:

Printer Model: CR-10s  
 MCU / Printerboard: BTT Octopus v1.1 F446  
 Host / SBC: RPI3b  
[klippy.log](https://klipper.discourse.group/uploads/short-url/5nUh0WcDTyWXo6591doTaNeh6eC.log) (211.0 KB)  
 klippy.log

Hi, any ideas how to fix this? Each time the dual axis steppers move, the extruder will follow.  
If I do:  
G91  
G1 Z+1 F1500  
then three steppers will move. I have recently migrated the printer to use a btt octopus board and klipper but the wiring is unchanged so I suppose I must have done something wrong in the configuration file. X and Y work as expected.

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**Author:** ![rba](https://avatars.discourse-cdn.com/v4/letter/r/839c29/32.png) [@rba](https://klipper.discourse.group/u/rba)\
**Post date:** [December 17, 2024, 7:27am UTC](https://klipper.discourse.group/t/extruder-active-when-z-axis-moves/20743/2 "2024-12-17T07:27:24Z")

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The answer was in: [Extruder motor/ Z axis issue](https://klipper.discourse.group/t/extruder-motor-z-axis-issue/3416)

This board has 9 drivers for 8 axes where driver\_2 is mapped as motor2\_1 _and_ motor2\_2. I did not look at the PCB silkscreen, I only used the driver table in the manual which only has 8 lines not 9. So there is no need to configure stepper\_z1 on this board, it seems to be designed as dual in hw already.

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [January 16, 2025, 5:27pm UTC](https://klipper.discourse.group/t/extruder-active-when-z-axis-moves/20743/3 "2025-01-16T17:27:34Z")

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