Cura changes retraction from 1mm to 6mm part way through file

[Gimbal57 0]

Sorry - just realised I put this in the wrong place but don't know how to move it

 

 

Hi

 

I'm new here and have had my Ender 3 Neo for about 6 weeks.  I'm using Cura 5.4.0 and with a test model from Thingiverse.  Filament is PLA+.  Gcode, stl and curaprofile files are attached.

 

I have retraction set to 1.0mm in Cura (direct drive extruder) and up to and including layer 20 that is what happens.  At layer 21, for some reason, Cura starts coding for a 6mm retraction and I don't know why.  This ultimately causes under extrusion/clogging/skipping.

 

I have included below extracts from the gcode file for layers 20 & 21.  These clearly show 1mm and 6mm retraction. 

 

At layer 21, entries like ;[CAZO:G1 F3600 E351.00338:CAZO] start to appear, but my understanding is that they are commented out so should not be read but the printer.

 

Can anyone tell me what is happening and how to make it stop?

 

Many thanks

 

Peter

 

--------------------------------------------------------------------

 

Extract from layer 20:

 

G1 X118.349 Y120.152 E320.6773
G1 F3600 E319.6773
G1 F600 Z5.14
G0 F7200 X102.354 Y120.649 Z5.14
;TYPE:WALL-OUTER
G1 F600 Z4.94
G1 F3600 E320.6773
G1 F2400 X102.442 Y120.484 E320.68328

 

--------------------------------------------------------------------

 

Extract from layer 21:

 

;LAYER:21
;MESH:Tiny_Tester.stl
G0 X103.188 Y99.839 Z5.37
;TYPE:FILL
G1 F600 Z5.17
G1 F2400.0 E351.00333;[CAZO:G1 F3600 E351.00333:CAZO]
G1 F4800 X103.719 Y99.309 E351.02844
G1 F2400.0 E345.02844;[CAZO:G1 F3600 E350.02844:CAZO]
G1 F600 Z5.37
G0 F7200 X104.967 Y99.31 Z5.37
G1 F600 Z5.17
G1 F2400.0 E351.02844;[CAZO:G1 F3600 E351.02844:CAZO]

 

 

 

Tiny_Tester.stl PLA+ Sunlu Silver 0.4mm Nozzle.curaprofile Tiny_Tester.gcode

Edited August 1 by Gimbal57

[GregValiant 1,111]

You have the post processor "Change At Z" running.

On the left end of the slice button is an icon with a red circle that has a number in it.  Click on the icon and close "Change At Z".

This is from the gcode file you posted.

;LAYER:20
;MESH:Tiny_Tester.stl
;[CAZD:
;RETRACTFEEDRATE 2400.0
;RETRACTLENGTH 6.0
;:CAZD]

[Gimbal57 0]

9 hours ago, GregValiant said:

You have the post processor "Change At Z" running.

On the left end of the slice button is an icon with a red circle that has a number in it.  Click on the icon and close "Change At Z".

This is from the gcode file you posted.

;LAYER:20
;MESH:Tiny_Tester.stl
;[CAZD:
;RETRACTFEEDRATE 2400.0
;RETRACTLENGTH 6.0
;:CAZD]

 

Thank you.  Regrettably, it not the first time I've left the post processor running 😊