I just did a print for a gift, and went with ironing on top surfaces. It did half of one face perfectly, the rest however not so much.
I am completely confused by this result, not something I have ran into, anyone have advice?
The filament was freshly dried, weight is checked and logged. It dropped less than a gram after vacuum storage and that drop was 8 hours in a Sunlu box.
So it should be plenty dry, and literally everything in the print was fine, just the top surfaces… and then only partially messy.
Check your bed is level. There is a procedure for that. My Brother had his P1 failing larger prints, bed adhesion issues. Turns out it was never truly level 6mm Out !! Followed the manual bed tramming procedure and it’s all good.
Got it…
I was not sure, been a long while since I had a weird one that stumped me. It was the sudden change in the middle that was so confusing.
Will tram it and post the results.
Ironing has too many variables.
For every combination of:
- Filament
- Temperature
- Number of Top layers
- Top layer / Overall flow
- Top layers over infill OR top layers over solid
- Nozzle
you will likely need new ironing settings to get it perfect
Instead of screwing around trying to learn the arcane art, you would probably do better to just spit out this for 22g of filament – Complete Ironing Test for Pla and Petg by tholeyMakerWorld: Download Free 3D Models — and use whatever settings it says
re: *nozzle: not just size. each one. you’re asking the flat part outside the aperture to do precision work. Y’know, the part that wears and degrades 
arcane art…
my biggest issue with the bambu products is while they work lovely, when there is an issue it is a bit of an adventure to figure out what is broken.
Mainly because of the obfuscation caused by layer after layer of software and handlers between you and the hardware.
So there is a file that magically will tell me what is wrong…
see above statement. I will tram the bed, still not done due to a death in the family, but on the list for this weeks tasks.
I don’t mind working on the systems to tune them. Which is how I managed to run a production unit with Ender 3’s as the primary printers. they were a pain in the ass and took a lot of coddling, with that though, i did push thousands of prints through the wee bastids.
Ironing is the most precise action you can ask a FDM printer to do. Doubly so with such a wide surface. You’re basically printing a 0.001 layer with an entirely different and new flow dynamic 
I agree slightly w/ tram the bed… maybe check under your build plate for crud causing unlevel, but I would knock out a quick calibration print first, you might be surprised. I see the half thing but it honestly doesn’t look very good on the “good” half either. I’m assuming you have it set to concentric top surfaces, with a rectilinear ironing pattern? Or is it the other way around?
rectilinear with concentric yes.
The speed is also a tish high, but first time with this particular product so was expecting to be a little rough, but the smearing across half had me stumped. The unit has been cleaned and trammed, half to make a deliverable before I can kick out another test.
I don’t do a lot of decorative stuff comparatively. Lots of functional stuff which rarely has many challenges. Of course my youngest client wanted a kitty box… :
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