How can I stop that from happening?
I added a fillet to the transition between the inner flat piece and the wall, but it’s still causing a defect where the yellow and pink meet. One layer appears to be slightly pushed out on the outside. I believe I can improve this by changing the wall order to outside > inside.
But my main issue with the slowdown is that I must be missing something in the slicer, as it slows down to almost 45mm/s once it passes that line.
It slows down to allow better layer cooling. That may even be the name of the setting to look for. Since there’s hardly anything to print at these levels, there can be issues if the head comes back to print at the same place too soon.
I will check into that it’s worth a shot. What’s weird is it doesn’t print that way if the object walls are the same but the object is hollow. ← I was looking at a different model and wrong.
So when its hollow, does the whole thing print at consistent pinl \45 seconds or at full speed 170 etc?
Nope I was wrong, it does print that slow too. So it must be the wall is too thin or something. The wall thickness currently is 1.6mm wide, I will have to inspect that later to see where I can gain some speed back.
Didn’t you try unchecking the “slow for better cooling” option in your filament settings? I would not do it but I bet what you see is the result of this default setting.
I did, and it fixed it. What I find interesting is that the more clones I put down, the faster it prints those walls. The wall thickness is identical. However, even though your recommendation fixed my issue, I will have to find another solution because Bambu won’t let me alter filament profiles for MakerWorld printing for users. Thank you for showing me the setting I needed to change. 
The cooling time is related to the time needed to cool a single layer. The reason the nozzle speeds up when you have clones is because the time it takes to print a layer is long enough for cooling that layer, so there is no need to slow it down.
Just as stated above, adding more parts to print means it takes longer for the head to come back and start a new layer so the previous layer has enough time to cool and there’s no need to slow down and wait.
Thanks for the information, I think when I add more items to the build plate I’ll be ok. I was testing this as a prototype on its own and haven’t seen this happen before so this is good information that will help me going forward. Thank you again.
