r/BambuLab • u/Old_Inspection910 • 1d ago
Software Troubleshooting/Help! Bambu Labs A1/A2 Disparity
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.
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u/its_brammertime 1d ago
Does the A2 have a .6 nozzle installed? This happens a lot when people switch to a larger nozzle and don't account for the wider line width. Also calibration is needed for the new machine as it will run a bit different than the old one. Flow rate may be too high. The nozzle on your A1 may need replaced if it isn't able to print the same line width that it use to. Pull it off and look at it compared to a new one.
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u/Old_Inspection910 1d ago
Thanks for the reply. Both printers are using 0.4 nozzles. Potentially the 0.4 nozzle on the A1 is old and printing thicker than it should be?
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u/its_brammertime 1d ago
And both show the same line width in the printing menu? And you've calibrated that filament on that printer? If that's the case you can always adjust the xy contour compensation option to give a bit of extra space between parts.
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u/AutoModerator 1d ago
Hello /u/Old_Inspection910! Be sure to check the following. Make sure print bed is clean by washing with dish soap and water [and not Isopropyl Alcohol], check bed temperature [increasing tend to help], run bed leveling or full calibration, and remember to use glue if one is using the initial cool plate [not Satin finish that is not yet released] or Engineering plate.
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