Minor improvements & fixes for Ender-3 V3 KE

[cochcoder]

As mentioned with this comment

[Orel-A]

The machine_pause_gcode should remain the same, only change_filament_gcode should be changed to M600.
The M600 gcode is a pause and a retraction of filament:

[cochcoder]

The machine_pause_gcode should remain the same, only change_filament_gcode should be changed to M600. The M600 gcode is a pause and a retraction of filament:

Thanks for pointing this out! It has been reverted.

[Orel-A]

Looks good.

[SoftFever]

LGTM
Thanks

[Orel-A]

@cochcoder
There is a problem with this line in Machine End G-code:
G1 X5 Y5 F3000 ;Wipe out
It caused me today an out of bound error. The print hanged without finishing and stuck there.
We should rethink these 3 lines:

G1 E-2 F2700 ;Retract a bit
G1 E-2 Z0.2 F2400 ;Retract and raise Z
G1 X5 Y5 F3000 ;Wipe out

What do you think?

[cochcoder]

@cochcoder There is a problem with this line in Machine End G-code: G1 X5 Y5 F3000 ;Wipe out It caused me today an out of bound error. The print hanged without finishing and stuck there. We should rethink these 3 lines:

G1 E-2 F2700 ;Retract a bit
G1 E-2 Z0.2 F2400 ;Retract and raise Z
G1 X5 Y5 F3000 ;Wipe out

What do you think?

How tall was the print? I think it went up too high in the end due to not checking its current height.

[Orel-A]

It went out of bound on the X-axis.

[cochcoder]

Can you send me tbd project file?

[Orel-A]

The model file is under copyright license.
https://www.crealitycloud.com/model-detail/659aa4ff2063ad89b7be1e6a
The part being printed is the MOONLEFTUP.stl file.
Downsized to 80% (aside from the height) which is 216mm x 216mm x 30mm.

[cochcoder]

Are you able to recreate the error by using a small piece of a cube? If so can you upload that project file?

[Orel-A]

Here:
Cube Error.zip
Edit: Accidentally opened it in BambuStudio, download it now again.

[Orel-A]

Any conclusions?

[Orel-A]

@cochcoder
I made some changes to the Machine End G-code that will also allow us to increase the printable height. I also removed the problematic "Wipe out" gcode line.
The [stepper_z] section in printer.cfg has a position_max of 246mm.

New code:

G92 E0 ;Reset Extruder
G1 E-1.2 Z{max_layer_z + 0.5} F1800 ;Retract and raise Z
{if max_layer_z < 50}
G1 Z{max_layer_z + 25} F900 ;Raise Z more
{endif}

G1 X2 Y218 F3000 ;Present print
M106 S0 ;Turn-off fan
M104 S0 ;Turn-off hotend
M140 S0 ;Turn-off bed

M84 X Y E ;Disable all steppers but Z

JSON:

"printable_height": "245"
"retract_lift_below": ["245"]
"machine_end_gcode": "G92 E0 ;Reset Extruder\nG1 E-1.2 Z{max_layer_z + 0.5} F1800 ;Retract and raise Z\n{if max_layer_z < 50}\nG1 Z{max_layer_z + 25} F900 ;Raise Z more\n{endif}\n\nG1 X2 Y218 F3000 ;Present print\nM106 S0 ;Turn-off fan\nM104 S0 ;Turn-off hotend\nM140 S0 ;Turn-off bed\n\nM84 X Y E ;Disable all steppers but Z"

[cochcoder]

@cochcoder I made some changes to the Machine End G-code that will also allow us to increase the printable height. I also removed the problematic "Wipe out" gcode line. The [stepper_z] section in printer.cfg has a position_max of 246mm.

New code:

G92 E0 ;Reset Extruder
G1 E-1.2 Z{max_layer_z + 0.5} F1800 ;Retract and raise Z
{if max_layer_z < 50}
G1 Z{max_layer_z + 25} F900 ;Raise Z more
{endif}

G1 X2 Y218 F3000 ;Present print
M106 S0 ;Turn-off fan
M104 S0 ;Turn-off hotend
M140 S0 ;Turn-off bed

M84 X Y E ;Disable all steppers but Z

JSON:

"printable_height": "245"
"retract_lift_below": ["245"]
"machine_end_gcode": "G92 E0 ;Reset Extruder\nG1 E-1.2 Z{max_layer_z + 0.5} F1800 ;Retract and raise Z\n{if max_layer_z < 50}\nG1 Z{max_layer_z + 25} F900 ;Raise Z more\n{endif}\n\nG1 X2 Y218 F3000 ;Present print\nM106 S0 ;Turn-off fan\nM104 S0 ;Turn-off hotend\nM140 S0 ;Turn-off bed\n\nM84 X Y E ;Disable all steppers but Z"

Sorry for taking so long to reply, I'll include the changes that you have, but I was thinking of adding a variable so that the wipe doesn't go over the max.

What do you think about having the printer only check if it can go up 25mm rather than 50mm? This would mean that there would no longer be a 25mm gap from the print head and the top of the printer at the end of each print.

[cochcoder]

Is there a noticeable difference when the wipe gcode is removed?

[Orel-A]

It's useless since it's wiping on air, there is a 0.2mm gap. So basically it doesn't do anything.

[cochcoder]

@Orel-A
I've included the changes in a per, except for "retract_lift_below": ["245"], as this has to do with z-hops.

Before I mark it as ready to merge, can you have it go up to 245 on the z axis and make sure that there are no issues with that change? I am weary about this change as it is above the build volume given by Creality.

[Orel-A]

Before I mark it as ready to merge, can you have it go up to 245 on the z axis and make sure that there are no issues with that change? I am weary about this change as it is above the build volume given by Creality.

There are no issues because the previous Machine End G-code had a 5mm Z-axis lift at the end of each print, so 240 + 5 = 245mm.
And I had run a few prints in the past that reached this height by removing the 5mm lift.
I also confirmed it just now by running G1 Z245. It's working.