Updated - Resolved by swapping the PEI plate to SuperTack
I’ve been trying to print something that I’ve successfully printed dozens of times, but since yesterday I’ve failed the print every time with the same settings/filament as before.
Can you guys tell me what went wrong? It always does this at different points in the print usually after 50%. This failure occurred around 80% of the way and I recorded it.
Textured PEI plates eventually wear out ultimately losing their properties so just because you printed this countless times doesn’t mean the plate can still stick. But you didn’t mention if you properly cleaned the plate.
Either way, cleaning the plate should be your first troubleshooting steps followed by using a different plate. Does this happen with other filaments?
Also, your video shows that the model gets caught at the middle of the object. This could also be explained by filament expanding because it has moisture, so drying filament is another troubleshooting step.
As a final step, have you tried brims? I don’t see it in the video.
Thanks! I was able to print other objects that weren’t nearly as tall using the same filament so it could be that the PEI plate needs to be cleaned. I just gave it a wash and will leave the filament in the dryer overnight and try again tomorrow.
I was worried that the print head itself was running into the object for some reason.
Cleaning the plate is the first thing I do when a print comes loose.
Personally, I would have added a brim for a model that had so little surface in contact with the plate. But apparently you’ve printed this before, so maybe I’m over cautious.
Maybe you are using a sparse infill that crosses itself on each layer, like grid? If so, the nozzle is striking the model at every intersection. Try a non-crossing infill like gyroid, rectilinear, or zig zag.
If you copy the link over to an empty page and view it full screen and at about .25% - .5% speed, it looks like the bed moves up into nozzle tip.
The bed height should not move up or down within a given layer, and should drop away from nozzle as print progresses.
Maybe the bed movement is where it has already broken loose from bed and texture cause model to sit slightly higher?
Possibly an outer brim only might help?
If you look close on the z-axis screws, the bed actually does move up and down very slightly within a layer as the head moves across the print. It’s part of the bed leveling bit.
@bannor11 - you can also increase the build plate temperature a few degrees to help hold the model stuck down.
I edited my comments some. I also ditched those gold textured plates a good way back.
Maybe just try moving it to a less used spot on the build plate might help.
Even after washing the PEI plate the build still got knocked over at some point. Swapping over to the Cool Plate SuperTack worked this morning! I guess the PEI plate is not holding on as well as before. Thanks for all the help guys, I was afraid something was wrong with the print head, but it’s just an adhesion issue.