K2 Plus source

[XxPatrickxX]

When will the source for the K2 Plus be published?

[rubienr]

Would be nice to see some schema/pinout-diagram and/or other documentation to fix various Klipper config issues.

To name just a few:

• the Power switch on output_pin PC9 (see printer.cfg); what does it do? (What does the "Power" switch - [output_pin power] pin: PC9? rubienr-creality/k2-config#6)
• confusing names of sliders and switches in Fans & Outputs (Fluidd; Klipper config)
• Chamber Heater Power switch goes out of sync with "Power" in Thermals -> Chamber Heater if Target-temp is modified: to reproduce enable Thermals -> Chamber Heater -> then toggle Fans & Outputs -> Chamber Heater Power switch
• Fan {0,1,2} slider should be named accordingly: Part Cooling Fan, Chamber Cooling Fan and Aux Fans
• Ptc Power switch should be Chamber Heater Power
• Fan switch should be Extruder Fan Power
• Fluidd camera fix (currently not showing camera, see: https://github.com/dng-crafts/k2-camera)
• Fluidd -> Configuration -> Other Files -> DOCS -> Error: Access to file docs forbidden by reserved path 'moonraker'
• Fluidd -> Configuration -> Other Files -> CONFIG_EXAMPLES -> Error: Access to file config forbidden by reserved path 'moonraker'
• just a shot in the dark, but i guess folder /mnt/UDISK/creality/userdata/history/humbnail should be /mnt/UDISK/creality/userdata/history/thumbnail; please use lower-case folder names in Linux, thank you - a mount point is nothing special :)
• ...

[rubienr]

Very poor network/transfer performance

Since there is still no K2 repository for issue tracking i will report here:

• having the K2 attached to 1GB LAN, iperf reports 91Mbit
• scp copy speed to disk /mnt/UDISK/ wich is /dev/mmcblk0p14 is 35Mbit
• copy via slicer to printer: 0.96MB/s (48MB in 50s)

The copy performance is not acceptable - 35€ Pi with Octoprint outperforms 1.5k€ K2 🚽.

Image taken from K2 at Creality store [1]

I would retire before a 200MB slice is copied to the printer. Especially since Creality considers its ROM.
The screenshot clearly breaks it town to what it is: sloppy engineering in HW and SW but with too much lordliness.

[1] https://store.creality.com/

[rubienr]

How to mitigate the issue (5x faster transfer)

The issue: CrealityPrint protocol.

The fix:
Use OrcaSlicer with OctoPrint/Klipper protocol (not CrealityPrint). I guess you already use the free open source GNU AGPL OrcaSlicer, since the so called "Creality Print: a self-developed Fused deposition modeling slicing software produced by Creality.", which truly is "self-developed" and of course no fork of OrcaSlicer *sarcasmflag-off*, crashes already at startup. 🤦‍♂️

Performance gain: about 5.5 times faster upload

• 69MB in 16s with OctoPrint/Klipper protocol (4MB/s write rate is still not great)
• 69MB in 89s with CrealityPrint protocol (absolutely terrible)

[rubienr]

🐛 Bug: Z-Offset buttons in the UI are inverted.

Display: Cogwheel → General → Expert Mode → Z Offset

• As a user i would expect:

  • given the z-offset symbol is Z↑
  • when i press that button
  • then z-axis moves up ("nozzle moves up"; bed moves down).

• And vice versa:

  • given the z-offset symbol is Z↓
  • when i press that button
  • then z-axis moves down ("nozzle moved down"; bed moves up).

The symbol clearly depicts zhe Z-Axis, not the bed, hence it the current behaviour is wrong.
Version: 1.1.2.6

[crusty-dave]

Where is the changelog for 1.1.2.10?

[rubienr]

🐛 mDNS does not advertise, please check config in /etc/rc.d/S99mdns.

[rubienr]

🐛 /usr/bin/web-server dirlisting fails at endpoint /downloads/video/

Example:

1. open downloads in browser: http://<printer-ip>/video/ (/ is required)
2. NS_ERROR_NET_PARTIAL_TRANSFER

🐛 /usr/bin/web-server does not serve dir if endpoint has no trailing /

Examaple:

1. open downloads in browser: http://<printer-ip>/downloads/ (/ is required)
2. click on any subfolder
3. 🐛 404 Not Found
4. go to address bar, add tailing / -> dirlisting works

[rubienr]

🐛 Z-Axis moves in wrong direction

1. On display: tap on hamburger menu (below home icon)
2. move z axis with symbol: ↑z
3. z axis shall move up (bed moves down)
4. same for ↓z

Please stick with the convention:

Given following perspectives:

• the "coordinate system" perspective (as seen from the Nozzle)
• the "bed" perspective (as seen from the print area)
• the "bad" perspective (invented by Creality).

Either use axis symbols and move axis in expected direction,
or use bed symbols and move bed in expected direction,
but never mix both!
Currently K2 applies the "bad" perspective.

• if axis symbol is used -> the axis/nozzle shall be move in the expected direction
• alternatively: if bed symbol is used -> bed shall move in the expected direction
• 🐛 It is a bug if axis symbol is used but the bed perspective is applied! (and vice versa). This can be called Cerality's proprietary "bad" perspective.

[rubienr]

🐛 Extruding from Display

• Extruding 1mm, 10mm or 30mm from display UI always extrudes 1mm with 1.1.2.10.

[rubienr]

🐛 Manually moving bed upwards may destroy nozzle!

Come on @CrealityTech, this is insane and a shame! We report bugs but anything remains unacknowledged; not even a notice.

HOWEVER FOR A 1.5k€ PRINTER THIS IS NOT ACCEPTABLE:

• Moving bed upwards after XYZ were homed, the bed successfully crashes into the nozzle and bends the whole print head inclusive linear rail upwards! I hereby want to request a free replacement of the printhead and mechanics since it bent it all upwards.

This printer is excellent in copying sensitive data and sending it back to CN clouds - Kudos! But the FW and its configuration is an expensive piece of garbage! Make it open source, let the community do it better or do your homework!

headdesk

[rubienr]

🐛 Wrong UI behaviour - "Fan" vs "Axis/Temp." Screen

Once the "Fan" screen is entered the "Axis/Temp." Screen becomes unavailable.

How to reproduce:

1. go to home screen: tap home symbol
2. tap the fan symbol: bottom right on home screen
3. tap home screen again
4. go to "Axis/Temp." screen: tap hamburger icon
5. 🐛 instead of "Axis/Temp." screen, the "Fan" screen is shown

In order to exit the "Fan" screen, a very unintuitive tap anywhere in-between the fan sliders is required.

K2 FW Version: 1.1.2.10