The end of December I bought a K2 SE. Once setup I was able to print a few things without any issue after resolving a software conflict with Creality 7 and uninstalling and installing the 6.3 earlier version the consumable mismatch issue was solved. Then next up was a nozzle crash that scared the build plate badly. I found that changing the Z offset from 0 to .08 resolved that issue. I had been printing successfully until a few days ago and the nozzle again crashed into the build plate again destroying a new build plate. This was just after completing a print and moving to the next one after changing the filament spool only, no changes were made to any slicer settings. As of that most recent nozzle crash the printer is unusable as I cannot start a new print without the nozzle crashing. I have checked the tightness of the nozzle and hot end screws all were tight. I performed a self check leveling successfully without a nozzle crash. When starting a print the printer goes through its standard bed leveling before starting the print, then crashes when the print starts. I am at a loss to what steps need to be taken to correct the issue. I have sent an email to After Sales Support but have not heard anything from them yet. I have heard the strain gauge may cause this but the printer is not that old and only had maybe 4 spools of filament ran through it. Its still possible but think its something to do with the Z offset. It was sliced with the same settings as the previous print but I may be missing something. Any ideas on what to check?
Other issues I have noticed with the K2 SE is that the advertised “Smart Auto Leveling”, that is only supposed to target the print area instead of performing an entire bed leveling process, has never happened. This was supposed to be implemented with an OTA firmware update. Obviously a software issue, even though I brought this to the attention of Creality support I have heard nothing in return. All the same I know the bed is level.
Update: Not Solved, I went ahead and changed the strain gauge. During removal the mounting screws from the strain gauge to the heat sink were so loose I thought I had the wrong hex wrench. After replacement and securing the screws tightly I performed another leveling check from the self check screen on the printer. All went well until I tried to start a print then the nozzle crashed again.
I am not familiar enough with Fluidd to adjust the Z offset in that software. When adjusting the Z offset through Fluidd if you are adjusting with the up arrow which would indicate positive then when saving shows it in a negative value. At this point I am not sure which way to adjust it. I had previously adjusted the Z offset through Creality Print nozzle presets. Now that has no effect.
I also tried the USB factory reset hoping it would clear everything and reset the printer to an brand new out of the box state. But that wasn’t the case. It didn’t even go back to the base firmware. I performed the self check calibrations all went well. Then tried to print a Benchy off of the printer screen using a basic nozzle preset, nothing has changed. As of now all I have is a build plate engraver.
Hi @justpassntime 
. Can you quickly try the following. I don’t personally have the K2 SE, but let’s give it a shot:
Open Fluidd, home the printer and run PROBE_CALIBRATE. Lower the nozzle in small steps until a piece of paper just starts to drag under it, then run ACCEPT and SAVE_CONFIG so the offset is written into the printer’s config. After that, restart the printer and try a print without applying any nozzle presets from the slicer. This should hopefully stop the printer from resetting the Z-offset right when the print begins.
Let me know if it makes a difference
I have not tried this yet as after thinking more about the most recent nozzle crash it was done from the printer display files menu. To me this says it’s a definite firmware issue since the print was not initiated from any slicer software. Thoughts?
@justpassntime it’s certainly possible. However as mentioned in one of my prior responses to another user, firmware issues tend to result in problems that are a lot more widespread. So many users will usually have the same issue. The exception to this would be in cases where the firmware doesn’t specifically account for variances in machine tolerances. For example there’s a small problem with a few of the i7s where an error pops up that basically indicates that filament isn’t feeding in the intended manner. It seems that it’s actually down to a minute increase in friction between the extruder housing and the gear shaft, since some users are able to solve this by adding extra lubrication to the aforementioned shaft. This issue also existed with some of the K2 models and was most likely fixed by accounting for variances in tolerances within the firmware, because it seems to occur a lot less frequently now.
That being said, I do not know how widespread your specific issue is, because I haven’t checked the other forums to have an idea of it’s prevalence. So as mentioned, it could be firmware. What I provided was a possible workaround for now. Let’s try it and once you report back, we can take it from there
I was prepared to try adjusting the z offset through Fluidd after getting a video of the bed and nozzle crashes to send to Creality. I haven’t messed with it for a few days at all. The printer was off for 4 days now. Magically when I went to reproduce the issue for a video everything is working as it should. I have no explanation. Firmware etc are all the same. 4 days ago I could not even attempt to start a print. I suppose its also possible there is a heat soak issue with a circuit board somewhere. All fans are working so nothing weird there. Oddly I am now upset it works the way as designed. I should be elated right? I tried 5 times starting prints and reproduce the nozzle crashes. At this point I have no clue what has changed or why. I anticipate the issue returning with a vengeance.
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@justpassntime I swear this is how it always happens 
When you want to demo, suddenly the issue no longer exists. Similar to how when one looks for things you cannot find it, but when you are not, well… it just shows up.
I’m rooting for you here man … Hopefully the issue just disappeared for good. That K2 seems to be up to some Voodoo tricks!
Give us an update in a bit to let us know if it has remained that way 
Ok more nozzle crash issues after reflashing and new strain gauge. I then copied all parameters from Creality Print and entered them into Orca software. I now haven’t had any nozzle crashes. Creality still refuses to believe that it is a software issue. I have updated firmware, re flashed the firmware, tried different versions of Creality Print and the only thing that resolved it was switching to Orca slicing software. It’s sad Creality can’t provide quality software for one of their newest models.
Amazingly I copied all parameters from Creality Print and entered them directly into Orca including g codes. I haven’t had any nozzle crashes or failed prints after ceasing use of Creality Print.
I have also named my printer Sybil because of its multiple personalities.
New update. I now encountered a nozzle crash using Orca. It appears now to not be software specific. This has been months of frustration, wasted time and money. I am seriously considering buying a brand other than Creality. I have no confidence in Creality to solve printer issues. I am not the only one having these issues the forums and social media have many instances of the same issues being reported. I don’t feel that end users should have to be a beta tester for a product with continued issues. I have nearly sixty emails in my inbox pertaining primarily with nozzle crashes in communication with Creality Support. Enough is enough. https://youtu.be/F9e2T7VXcpg?si=W1s6itiS-Jw09GyD
I am now having the same issue with mine. I was able to print just fine, then I updated my CrealityPrint software and now every new print I am attempting today is doing this exact same thing as your video.
Funny enough, I ran a print on the pre-loaded Boat file and that printed just fine without issue. But everything else is having this same crashing issue when I try and print.
Have you had any success since your last post?
Mine is a week old and printed like 50+ plates (2 rolls of filament worth) and then, all of sudden, now I’m having problems getting a guitar pick to print with the nozzle crash happening once, had several successful prints after, changed filament, and nozzle crash again. I noticed that you have the camera mounted in the right corner - I JUST installed that kit with the proper cable and the camera, changed filament before printing first design, and that is when the first nozzle crash happened. The plug for the cable has next to no clearance on the motherboard to the rubber drive belts that move the Z, so I’m just curious if you noticed any correlation with the camera installation, particularly after filament changes…