No, I didn’t place the failed print in a certain way.
All photos were taken of how I found the machine and the build area.
I can’t rule out adhesion issues, as I haven’t yet had the time to start and observe a new build job.
However, I would be surprised if adhesion is the root cause because:
I haven’t had any problems while printing some smaller parts e.g. as part of the Teaching Tech calibration guides
I am using ‘very standard’ slicing and printing parameters, very close to what I’ve seen in brent113’s post regarding his Cura (or maybe S3D) profile
I am quite confident in the manual bed levelling results, again based on the Teaching Tech test of printing in all 4 corners and the centre
@xchrisd im thinking adhesion as well. The top most layers are in the center, if it were rails they probably wouldn’t be. I did have him double check the y rails, and checked out good. His speeds are well within the machines capabilities, it’s gotta be coming off the plate and being nudged around by the nozzle/melted filament.
I printed a ships mast for a pirate ship I designed, it was about to finish so I went to wait for the last couple minutes of the print, it came out perfectly but I looked really close at it as the nozzle was printing and could see it sway at the top ever so slightly from the nozzle near the finish because it was tall without a wide base. It’s really not hard for a print to get moved around when adhesion fails.
@Artezio Yep, it seems pretty obvious the piece moved on the Bed, especially in the second set of pictures.
Or he selected a weird placement/angle for the first layer
@SabinSnorlax What do you use for bed adhesion ? Nothing ?
I’ve not settled yet on the best one for my glass bed for every type of filament so I won’t provide tips yet, but for sure glass bed and nothing to make it stick could work sometimes for PLA, but you’re looking for trouble and definitively won’t work for Nylon or POM (for this i used an ABS first layer with Brim and glue)
Hi @SabinSnorlax , seems the printing moved and then caused the problem. Have you tried to add brim? You may use the original metal print sheet that comes with the printer to have a try if you still keep it. The original metal print sheet should provide better adhesion. And if you worry about that the printing is hard to be removed from the print sheet, you may have a try with the following settings.
Initial Layer Height: 0.3mm
Initial Layer Line Width: 150%
These problems were indeed caused by poor adhesion.
I added a 3mm brim around my parts and everything worked out smoothly.
Sorry for being such a noob;
In retrospect, I guess I should have known that such a smooth surface like glass won’t provide the same level of adhesion as the original Snapmaker print sheet.
Now I know and perhaps this will be useful for others encountering the problem.
