pause/resume scripts for OctoPrint 1.3.0

afterPrintPaused

{% if pause_position.x is not none %}
; relative XYZE
G91
M83

; retract filament, move Z slightly upwards
G1 Z+5 E-5 F4500 

; absolute XYZE
M82
G90

; move to a safe rest position, adjust as necessary
G1 X0 Y0 
{% endif %}

beforePrintResumed

{% if pause_position.x is not none %}
; relative extruder
M83

; prime nozzle
G1 E-5 F4500
G1 E5 F4500
G1 E5 F4500

; absolute E
M82

; absolute XYZ
G90

; reset E
G92 E{{ pause_position.e }}

; move back to pause position XYZ
G1 X{{ pause_position.x }} Y{{ pause_position.y }} Z{{ pause_position.z }} F4500

; reset to feed rate before pause if available
{% if pause_position.f is not none %}G1 F{{ pause_position.f }}{% endif %}
{% endif %}

Was having lots of problems getting this to work -- the extruder would not extrude after resume. I spent an entire evening on print fails until I found the comment in this thread by @c3r63ru5 . There is an issue in using the commands above with GCODE produced by Slic3r because it uses relative, not absolute extruder settings. I changed the resume code to the following and it worked perfectly.

{% if pause_position.x is not none %}
; relative extruder
M83
; prime nozzle
G1 E-5 F4500
G1 E5 F4500
G1 E5 F4500
; absolute XYZ
G90
; move back to pause position XYZ
G1 X{{ pause_position.x }} Y{{ pause_position.y }} Z{{ pause_position.z }} F4500
; reset to feed rate before pause if available
{% if pause_position.f is not none %}G1 F{{ pause_position.f }}{% endif %}
{% endif %}

Thanks you for everyone.

I've followed the entire process and sensor works fine when filament runs out but when I change the filament and press knob for resume print process hotend comes back to correct position for a second then quickly return to change filament position and extruder retract filament again... substantially I'm in a change filament loop!!! Why this happens??