I am having multiple problems and I don’t know how to track it all down so I thought that I’d start with a general description of what happened.
I was doing a large 3-D print. It seemed to work well for about 24 hours and then I ran out of filament. I loaded a new roll of filament of the same type (glow-in-the-dark PLA) and it started printing again. It printed about another centimeter of the model when all of the new stuff sloughed off of my existing print and then it just printed spaghetti since the height was off. So the first problem is that the new stuff didn’t stick to the old. With that print ruined I decided to try some other stuff and since then nothing sticks to the bed so all I get a partial models and lots of spaghetti. I tried automatic bed leveling the and walked away thinking it did it. It still didn’t work. I cleaned my bed and used fresh sticky spray, still no stick. I tried playing with the Z offset and I can’t get the head close enough to the bed see if that calibration piece gets tight. I tried another bed leveling and I watched it. On the third point it says “Auto Bed Leveling failed during probing heated bed. result 7” I have no idea what result 7 is and if it is anything that I can fix. Does anyone have suggestions as to what I should do next?
There were some calibration problems with older FW. Is yours up to date?
As for the bed adhesion, photos of your first layers would be good.
It sounds like your Z offset is not correct.
Fix the calibration issue first so you can calibrate, then work on the Z offset for better adhesion.
David,
I assume that by calibration you meant sensor calibrate. I did that just now. Then I went to calibrate the Z-offset. When I attempt to do it automatically, it just hangs. I gave it lots of time before I turned my unit off. I then went back in and did the manual calibration which seemed to work. Finally for a demonstration of the first layer printing I ran the offset calibration check which is supposed to print that little grid. Here is a picture of what I got.
Note that there is a mess on bed and on the hot tip.
It kind of sounds like your new spool of PLA is bad. The previous spool adhered to the bed fine, but the new spool won’t stick to the old spool or the bed. If you have a spool that’s worked in the past, see if that works better.
OK, You didn’t mention it was a dual print head.
Perhaps give us all the details such as machine settings, FW versions, Software and versions used, software settings used, etc etc…
So we don’t have to guess.
I will happily do so. I’m not sure what settings you might want. The only relevant settings that Luban shows are that it is a Snapmaker 2.0 and I have the Snapmaker 2.0 Dual Extrusion Module. My firmware version is Snapmaker2_V1.20.3_20240716 which I only loaded yesterday when I was trying to fix this problem. My previous version was V1.81_20231103. My controller version is V4.71. If you want something else let me know and I’ll try to find out. Since my latest failed print is just the calibration grid from the unit itself, my version of Luban should not matter, but it is 4.14.0.
I do not think that this is the root cause, but it may contribute: Glow-in-the-dark filament can be very abrasive, so it may be that your nozzle is no longer 0.4mm but has widened to anything due to adrasion. This will cause the filament not to flow in the right way. Perhaps use the second nozzle as a comparison.
But it would not explain why your Z-calibration fails with error 7 (whatever that means…).
The glow in the dark filament will indeed kill a regular brass nozzle pretty fast. Diamond back for the win here.
But the “Result 7” is a strange one, there are a few topics like this, and people seem to have it solved with firmware update (file on usb) when the dual extruder is connected and just removing the extruder to make sure it is assembled correctly - extruders are sitting right, and there is no issues with cord plug…
A video about the failed process would maybe help.
Is your toolhead correct assembled to the machine (the upper right holes on the dx)?
Your bed is also setup correctly, mounting nuts facing down?
Try calibrating your leveling sensor and do a calibration after power cycle.
If the hotend is pulled up by filament it would also lead to printing in mid air, is it easily to pull? Maybe watch your print or help the toolhead and pull filament into your enclosure.
Here is the answer from support about Result 7, thanks to @Zoe.
Usual troubleshooting process is:
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Do you have the Quick Swap Kit installed on your machine? If the installation status is incorrectly selected, it can trigger the “Result 7” issue. Please check the Quick Swap Kit installation status settings by referring to the video linked below: Check Quick Swap Kit Install Status.mp4 - Google Drive
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Observe whether the right extruder lifts up and down properly during the homing process. If it doesn’t move as expected, please refer to the article below for troubleshooting guidance: https://wiki.snapmaker.com/en/snapmaker_artisan/troubleshooting/extruder_r_failed_to_home
Beat me to it 
Do you want to update other threads?
The dual extrusion module says that it has hardened hot ends and I even bought an extra although I cannot find it. If there is something harder, I don’t see it among the accessories that SnapMaker sells.
As to firmware, I did upgrade to the latest version and it did not help. I have currently removed the dual extrusion module since I am pursuing some other suggestions by the actual SnapMaker support. After I see where that takes me I will re-attach and see what my status is.
The hardened hotends should be fine!
I wanted to tie up the loose ends on my problem. Part of it was the error 7 that was receiving when I tried to autolevel. I was working directly with Snapmaker support on this. They had me disassemble and reassemble my print head to test multiple things, non of which seemed to be problems. However, after I put it all together again, it now auto-leveled fine with no errors so I guess I must have changed something.
The second part of my problem was prints not sticking to the bed of the printer so they were failing whereas they used to work and I hadn’t knowingly changed anything. This seemed to be related to leveling or Z-offset which is why I spent so much time trying to resolve that problem. After getting my printer to level and checking the Z-offset (after all I did with Snapmaker support) , I decided to try a different PLA filament spool. I got much better results although still not what they should have been
Since it seemed to be a problem with filament not sticking I increased my printing temperature for PLA. I was using around 215 C so I cranked ip up to 229 C and the prints now work. I don’t know why 215 used to work, but I now know that I just have to print on the hot side of the filament range.