I’ve been working with ironing a bit on a logo I’m printing in my X1C, and had great success. Then I scaled that logo to pretty much the max the X1C can take, and now I’m consistently getting lousy results. The attached image is half-way through ironing the brown area doing vertical passes, working right to left.
It just seems to leave random streaks as if it’s raking the surface randomly. Wish I’d just turned it off! I’ve printed this twice now with the same results. These are the same filaments that worked well at smaller scale. I’ve seen others talking about increasing the temp for ironing, but I don’t see such a setting available in Bambu Studio.
The other things I have seen, warped item on the build plate, not enough top layers, low extrusion and sort of similar, ironing too fast.
But the thing that I wonder about is the scaling comment…
Might be worth printing a smaller test model block.
I’ve printed this at a smaller scale and the ironing is perfect. The top-to-bottom size on the one that’s working is 92mm small vs. 230mm huge and failing. Same filaments both times.
My choice would be a print that was the same thickness “Z” as the enlarged model, but only 50mm wide x 50mm deep, then check different settings.
Or use a test model from makerworld.
How many top layers are in the model?
The layer prior to ironing looks good, so no issues there.
I assume the print isn’t warping off of the plate and the toolhead is all tightened properly?
The print head doesn’t change height compared to the previous layer when ironing. Maybe your comment about raking the surface is what it looks like, rather than what it is doing.
I would still suggest a test print varying the ironing flow and speed.
That is confusing. The things that change when you scale up should be the height of the model and the area of the surface to be ironed. Sadly, I don’t know enough about the slicer to offer better comments.
Either try printing an ironing calibration print from Makerworld https://makerworld.com/en/search/models?keyword=ironing+calibration
OR
On the rare occasions that I use ironing, I see that the default ironing flow rate is 10%, I increase ironing flow to 18% - 20% on larger object that cause problems for me. FYI The default ironing speed of 30mm/s is usually OK for me.
I found this valuable. There are two axes. One is flow % and the other is speed. On my printer, I found 15mm, 15% worked best with a few different PLA filaments
