Please see image for the problem that I am having. The only way I get a decent first layer is if it is completely flat again the plate. For any overhang or supported area, I get the problem shown. Information:
I am using an A1 mini.
I have tried .4 nozzle and .2 nozzle
I have calibrated a couple of times using the Bambu Studio Calibration tab.
I have tried adjusting the z distance to no avail.
I have tried different speeds
I have tried different heights
I have printed a simple upside down L shape and gotten better results, but still poor results with my actual models.
I have seen good results on other’s prints, I am not getting them.
Check out the orientation of the top support layer compared to the next bridge layer in the slicer Preview. Ideally they should be at right angles to each other, but sometimes they end up being parallel which doesn’t provide good support.
Simply turning the model 90 degrees around the z axis can make a big difference.
I’ve also had good results from using a grid Interface pattern for models that are tricky to support.
You could also try changing the Top Z distance and the Support/object xy distance. Making those smaller should result in cleaner prints, but the supports might be more difficult to remove.
The miniature in the images has been printed multiple times. I rotated it multiple ways - still a terrible first layer. I have tried different grid patterns as well.
I tried a Top Z Distance at .2, .16 and even .05. Other than being more difficult to remove, the quality of that layer doesn’t seem to improve.
This image is pretty helpful in seeing what’s wrong. The way you have it oriented makes most of the bottom directly reliant on the support filament. This is always going to be messy, I also did this when I began. This design is not optimized for 3d printing but can easily be fixed by splitting the handle and blade into 2 parts.
Ok, that is for that piece, the miniatures are a mess. They have been printed in parts and as a whole… Same problem.
Cutting it up the model doesn’t seem to be the solution AND I don’t want that problem all down the side of the knife blade. There has to be better settings.
Cutting the handle and blade into two seperate parts and printing both upright will fix the issue. FDM printing is not designed for things like this. If you really don’t want to change the orientation then buy a roll of PVA (Support filament that dissolves in water) This lets you set the Z gap to 0 and get a much better interface surface.
So this still does not solve my first layer issue. I have tried printing with zero distance and clipping it off and it still gives me a really bad first layer.
Well obviously when you use PLA and do 0 distance it’s going to bond and not come off cleanly. You really just need to change the orientation. I don’t think you understand that this is a limitation of FDM printing.
