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…).