Only wondering why you did not try different slicer settings, or did you and did not wrote this?
If you did not adjust your slicer settings I do not wonder why the issue stays the same.
Increase the top layers to let’s say 1mm thickness and let us know..
If you’re using PETG, check whether poor parameters are causing the bad surface. Or first print the built-in 4-color dragon demo with PLA—if that comes out fine, the hardware is OK and we can focus on filament/settings.
We can’t advise without seeing your config, so feel free to post screenshots when convenient and we’ll give suggestions!
Um, I tried lots of different settings plus everything suggested here, and I still get the same result. Small prints with lots of curves will complete long most times brilliantly, flat ones will not. Well they complete if I let them but they look like they were molded with a cheese grater some actually had gouge marks from the extruder but I sanded like a madman to smooth them out. Resin printers aren’t even this temperamental.
Not using PETG, I dont want to waste that filament. I wont even crack it open until this is resolved, which I am thinking wont be done here.
Maybe just upload your 3MF file here so we can check the settings; that’ll save you test-print time and let the team (or other users) spot the issue right away. Feel free to attach it to this thread.
I am also working with support and have been uploading the 3MFs (3MF’s 
) there. Just a quick update, I performed a factory reset and started from scratch yesterday. I would suggest that anyone with similar issues do the same. This helped a bit because, after adjusting the Z offset from the factory settings, it has me kind of grinning. I still have the bumpiness and some grinding, oh, and that one oddball anomaly in the top-left corner, as you can see from the included pics (top is the VERY first layer, bottom is the completed output), BUT it’s better than before. This WILL take a bit of time, by the way, but right now I am looking at a Z offset of about -0.02. Maybe I will increase it by –0.005. I am doing the flow rate calibrations right now, so fingers crossed that this exorcises the demons in this printer.
Your fortitude is absolutely admirable 
Support surely can’t say you haven’t put the time in! Can’t wait for this to get resolved and you can use the machine as intended 
Thanks for the effort—great to see new progress!! A 0.02 mm deviation is already within auto-leveling’s compensation range!! Running the software auto-level now and then will help a lot!!
Next, just see if it prints normally for a while—if the results stay stable over time, you should be all set.
Well, so far, no real meaningful improvements. This is the latest batch of pics. I have run through many tests so far. Right now, I am doing a max volumetric speed test, then I will go back and print what will likely be yet another mousepad (the texture of the build plate makes the bottom of the print a perfect mousepad! (at least there is one positive)
Ok, the wrinkling won’t go away. This thing is probably going on eBay or something because no consumer-level product should require this level of troubleshooting. I appreciate all the help and suggestions that were given here, but this is ridiculous. At this point, I would tell anyone interested NOT to buy. I am happy for everyone who has a working printer out of the box, but mine isn’t. This is clear from the photos and posts; it is not like I haven’t been trying, but this is wasting a lot of filament and electricity. I’ve had analog missile guidance systems that were easier to align and get working than this thing. I have another FAILING red square printing right now on this useless printer. IF snapmaker wants it back to see if they can fix it, send a box and return postage.
I’d really hope that they’d send you a replacement…
Send them this thread！！I believe support can give you a satisfactory solution—reach out to them and discuss it.
I think not only should the problem be solved promptly, but you should also be given some compensation!! 
I have been in constant contact with them, and they insist it is the first bed adhesion issue since the beginning. I have literally been through a bit more than 2 kg of filament troubleshooting this. They just sent me some Gcode to try, which will likely only test the very first layer or two and nothing more.
If the filament you tested was the one that came with the machine, they owe you an explanation—I’ll flag it internally, because no user should burn days on endless tests. Once you’ve followed their steps, they need to deliver a final fix you’re happy with!
I started with what was remaining of the starter filament, and then rolled on to the eSun (likely garbage) and Polymaker (pretty good stuff there). Honestly, I am probably just frustrated, but I would REALLY love to have the printer work as expected. I am jealous of all the folks turning out awesome multi-color prints. Maybe they will have this thing working super awesome when the likely 6 or 8 color U2 comes to Kickstarter this fall (kidding)
Curious, the non-Snapmaker spools, are they fresh out of a factory vacuum sealed bag or have they been sitting around for a while? Do you have a dryer or something you can makeshift into one?
Long thread, don’t remember if you had this issue with the original 4 spools that shipped with the U1?
Good question, I have had the long flat print problem from Day one. The filaments were all fresh from vacuum-sealed bags. I do have the ability to dry filament, but given the timeframe from opening to use, then failing, there couldn’t be much moisture buildup (unless I was using TPU, of course). If it were that simple, I would have been ecstatic and then confessed my “senior moment” for all to share and laugh at.
Understood and I had thought it started out this way. Saying this not to rub it in but hopefully for ammunition to help get you a replacement unit:
Other user states:
My only “full plate” print was 35 Make Chips, which came out great. Not the same as something close to edge to edge though. If you want, feel free to message me the file you are printing, and I will see what I get. I’m very curious, and now a little scared, to test it out…
First floor printing test.gcode (77.2 KB) this is the latest 1 layer test they had me try and the results are attached as well the first two (top ones) are pre bed leveling and the bottom ones are post bed leveling (for the umteenth time). Previously they just had me print a 2mm high primative scaled to the size of the print bed. I am going to do the primative one last time since I am almost out of filament anyway. Best case: It finally works. Worst case: I have yet one more mouse pad (the texture from the build plate makes a great mouse surface)
Thanks! Clearing out the garage today, again, and running a couple test prints of my own. I should be able to get to this later today when I need a break from all the fun I’ll be having 
