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…
I am actually awaiting parts for my nozzle crashing K2 SE. Creality is sending the Y axis motor, not sure why, power cables, new build plate and heat bed.
In the mean time I bought an Elegoo Centauri Carbon. In have had no issues whatsoever and it is much quieter than the K2 SE even with an enclosure installed. It also ha laba much larger build plate. Additionally they just released the Canvas multi color kit for the Centauri.
If I ever get my printer going I will post what actually fixed it.
I suddenly started having the same issue. The start of every print, with and without calibration; it sets the Z height, then it starts the nozzle wipe and while it is out of the way, the bed raises another 10mm, and the nozzle immediately crashes into the bed HARD.
The first time it happened was during a project. I had printed a part in one color and the next bed in a different color is when the nozzle crashing started.
For clarity: the bed and nozzle crash together on the side of the bed not on top on it. And where the bed hit the nozzle is just under the gray nozzle shroud, literally the bed is as high as it will physical go.
I have not messed with any gcode. I tried reinstalling the software and printing something from my history that had printed successfully.
So i reached out to creality and told them what was happening and they are currently sending me a new print plate and another part, but i also uninstalled the latest Creality Print Software (went back from their new 7.1 and went back to 7.0) since I still had their prior install exe on my laptop and then did a full factory reset on my K2SE and now its working without issue. My assumption is that somewhere in the new updates something was causing the issue so scaling back to the version that DID work actually fixed it.
Ok, so I don’t know what to make of this… Much like OP, I gave up yesterday after 4 nozzle crashes in a row via 4 different prints, including Benchy included with the printer. Keep in mind hard power off as soon as crash occurred, so definitely power cycle in there. I was frustrated so I just left it off for the rest of the night. This morning I decided to start troubleshooting and just picked something random to print - it worked fine. So I picked more stuff, including 2 of the 4 things I tried to print yesterday and all printed flawlessly and now it has been running all day and has done 2x 4 hour prints back-to-back. No power cycle, no real temperate changes in the room it is in (was considering heat issues). I never factory reset it, I did not change the Creality Print version (been on 7.1 since I started) and 2x of my failed prints yesterday were preloaded so isolated from Windows or Mobile apps. Firmware was updated when I opened the box and has not been reverted. It just works beautifully like it did before yesterday - I have no idea what changed to make it work. The only thing I have NOT done is change the filament since it started working. Seems that both times I changed it, it began randomly doing the crash until it would only do the crash and wouldn’t print anything. The only diag thing I did yesterday was remove the filament so I could do a self-check out of desperation, but the check passed with zero issues. Loaded filament and tried to print - crash. Turn off and revisit this AM? Flawless with zero adjustments. I am completely perplexed…
Keep us updated on whether it keeps working. Mine would do the same and then for no reason would go through another crash cycle. This has happened numerous times when I thought the issue was fixed. I currently have my third replacement for the build plate. I realistically would have ruined over 20 build plates if I hadn’t just kept using the old scratched ones.
I did receive parts today for the latest nozzle crash. I was sent a Y axis motor and cable, build plate, hot bed, strain gauge and main printer board. I seriously doubt that it’s the strain gauge as I have already changed that. I have not installed them yet.
I hope your experience is better and longer lasting than mine.
FYI mine would crash printing off of the pre installed files from the printer’s display. This tells me it’s not the slicing software but a firmware issue.
I experienced the same random nozzle crash cycles you are having. It’s random and may happen several times in a row, nothing would seem to help. Then after being severely ticked off would just turn it off for a few days and when trying a few days later it would print perfectly. Then doing a 3rd or 4th print the nozzle crashes returned. Guessing that’s why they sent a main printer board to replace. It would seem to me that it could also be a extruder board, everything plugs into that and it is a new component on this model.
Keep us updated on your progress on getting it fixed.
I just received parts today but haven’t installed them yet. The latest round of parts included:
Y axis motor and cable
Main printer board
Hot bed
Build plate
Strain gauge
It looks like they are swinging for the fences on this. I have previously replaced the strain gauge with no improvement. Not sure why the Y axis motor and cable were sent because it’s the Z axis that drives the board vertically. I honestly don’t think they have a clue what the problem is. It’s definitely frustrating.
As far as the camera cable clearance from the z axis belts. I was able to gain enough room to keep the camera cable away from the belts by using small zip ties.
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Today I installed the new printer main board. I then ran the self check and printed a benchy from the printer screen no issues so far. Now printing another project with no nozzle crashes but we all know how that works. Just when you feel confident the problem is fixed…WHAM! The self check was done with a new build plate but I changed it to a damaged one before starting to print just in case of a nozzle crash.
I do feel however that the z axis is louder after putting the new board in. Could be updated firmware.
Creality sent me a Y axis motor and cable. I haven’t been able to find any instructional videos on Creality Wiki to replace motors or replace belts. The video for belt tensioning is for the K2 series and there are variations in components on the K2 models. The K2 SE is slightly different as is the print head extruder assembly. I emailed them letting them know there aren’t any instructions for the motor or belt replacement.
I think the issue is more a firmware issue than hardware. I have used Orca as well as Creality Print and I still had nozzle crashes. I even had a nozzle crash printing a benchy from the printer screen menu. So to me this says firmware. But so far today no issues, I am still not convinced the issue has been resolved.
Now waiting for Creality Support for an answer on the motor replacement instructions.
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Ok, so everyone humor me for a moment:
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Anyone having the nozzle crash, turn off, unplug your camera if installed (just unplug from camera side since that is easy), then turn back on and print.
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Does anyone having the issue NOT have a camera?
I noticed my screen kept saying that the “stage” it was in when the nozzle crash happened was “Foreign objects detection”. Since it can’t do that without the camera, I was like “let’s see what happens”. After at least 10 nozzle crashes in a row, cycling power, changing filament, etc, etc, unplugging the camera worked on the first try and has for several prints. If this doesn’t happen without the camera, it would explain why this isn’t widespread among ALL the K2 SE owners out there…
Let me know what happens…
Ryan
Ryan,
That’s an interesting idea on the Camera. Is your camera set to AI detection in the camera setings? If so I would disable the AI detection. Mine is not and I have never had any messages appear. I will try that if it crashes again. I have noticed too that the nozzle wipe is not always a clean one either and wonder if that contributes to the issue.
About the Y motor replacement. Creality support says that the K2 Pro is the same. It is far from the same in many aspects. Requesting better instruction for the repair not that I feel its even required for my issue.
I also determined that my noisy Z axis is being caused by the rear upper Z axis drive screw bearing. I have requested a new one.
I have noticed that the path the nozzle takes is different since the main board change. After its normal purge at the corner it goes directly to print the project. It still has never performed the advertised “Smart Bed Leveling” and always does a full bed level before a print, you all know the long process before it starts to print.
Ron