I’d just like to preface this that I am new to 3D printing generally (as of a few weeks ago and loving it by the way) and so I may miss out important details in which case I apologise.
I am printing a relatively tall (compared to what I’ve printed before) object - it’s a rectangular organiser. I am using eSun Matte PLA (Light pink if it matters) but twice now when the print has reached about ~4cm in height the nozzle has started making a horrible scratching noise while it’s moving the bottom right quadrant of the print which is 8Wx10Lx10H
I have a 4 layer raft and I’m using the Bambu Matte PLA profile on an A1 Mini with a PEI textured plate freshly washed in soapy warm water.
Bed levelling and flow cabliration is enabled beforehand. 4 wall loops (for extra strength). 0.16mm Optimal on a 0.4 Hardened Nozzle (brand new, only used with PLA/PETG 2 times before this). Otherwise, all defaults.
Inspecting the print it sort of looks like this right corner nearest me is perhaps a bit more wonky than the other corners but it’s really hard to tell to be totally honest with you. It seems to be laying down filament well despite the horrid noise but I am assuming this shouldn’t be the case.
Have I somehow skewed the axes on the printer/bed? I have performed the full calibration process multiple times since getting the printer.
I just had to cancel the print and inspecting it looks like it did lift but only in this one particular corner and both times with cleaning in between.
To add to this my thoughts may be that this is an issue with adhesion and I need to figure out how to stop the print from lifting in this corner. Perhaps higher bed temp or maybe this eSun filament just isn’t suited for the faster default that the Bambu filament profile has. I will try slowing the print down tomorrow and seeing if I have the same problem.
Also it has ocurred to me I should have used a brim as well as or instead of a raft after having done some more reading. I think this might just be me being a noob.
I don’t think using a raft is necessary for PLA prints (rafts are more common for ABS). If the part might detach from the bed, you can try a brim instead. However, since the object you’re printing is a “rectangular organizer,” which usually has a large surface area in contact with the bed, a brim may not even be needed.
When I first bought my A1 Mini, I had issues with the bed screws, and it required me to manually level the bed. You might want to check this guide: Manual Bed Tramming.
If you have any further questions, feel free to ask, and welcome to the 3D printing community!
So an update on this: I’ve tried tramming the bed today and while I haven’t tried printing the organiser again yet I do think it has made a positive improvement as print on one corner of the bed has always felt a bit off but now it feels a lot better.
I wonder if perhaps it was the case that I had been a bit too rough removing/replacing the plate between prints and perhaps wiggled something around and/or made something loose.
Anyhow, I will be attempting this again soon and I will get rid of the raft and perhaps try a brim just to be on the safe side.