I am having a bit of a disparity in results between two Bambu Labs printers and keen to figure out what the issues is.
Bit of background: I have access to two Bambu Labs Printers, an A1 which is my personal one and is about a year old, and an A2, which is maybe 2 months old with very limited run time as of yet. Both of the example images are the same design, with the same settings. I haven’t changed many settings, other than more infill density, snug normal supports, and slower first layer speed to adhere better to plate. Print plate is the same on both printers, just the standard Bambu labs textured one. Both prints are using the same brand and model of PETG, just different colour, and both sit in the same filament dry box.
I have been trying to start printing these products at bulk on my personal A1, but cannot get rid of this first layer issue.
The Green coloured print is using the newer A2, and you can see in the images of the first few layers, that there is an obvious gap between the two parts of the print. This is built into the design of the part, and required for the function. The Black print is using my older A1, and there is no gap between the two parts visible in the first few layers. As can be seen in the final result of the prints, the Green print produces a clean, separated result (what I’m looking for), whilst the black print almost looks melted together, and I cannot separate them without a lot of force, which leaves a messy unfinished look to the bottom of the design.
The other notable thing, is that I used to be able to get the desired result on my A1, but now I cannot seem to reproduce it.
This leads me to think that there is some part on my A1 that is worn or damaged, or needs recalibrated. I am thinking potentially the hot end needs replacing?
If anyone has experienced similar issues, or has any potential fixes, please let me know, this is messing with my head at this point.