Any idea where this "ridge" comes from?
I make 'bullets' for an Air Rifle (Winchester) and have made 100s with no issues.
They are basically a tube with a 4.5mm hole down the middle, so pretty simple.
Someone asked me to make a version for "Airsoft" which has a 6.5mm barrel.. Again, pretty simple, the only difference would be that the wall thickness would be thinner..
I printed a few and they looked good, but under closer examination, I notied a ridge near the top which isn't on my 4.5mm version (See attached photo.. The print on the left is the 4.5mm version.. The other 2 are the 'new' 6mm version where you can see the 'ridge' near the top.
I assumed that this had something to do with a thin wall, and expected the layer view to show this.. But Slic3r looks fine.. Equally if I open the GCODE file in a visualiser it also looks exactly like the one on the left.
Does anyone have any thoughts as to where this ridge comes from.. and why the top of this print is nothing like the Layer view in Slicer.
RE: Any idea where this "ridge" comes from?
If you print 1 model at the same time it wil get to hot ta the top.
Print more then 1 model, 6 models at the same time, then the first 1 can cool down.
-or more cooling with fan at a higher setting.
RE: Any idea where this "ridge" comes from?
Does the ridge correspond to an internal surface? It might be easiest if you zip and upload a 3MF project file with your part and settings to see what's going on.
RE: Any idea where this "ridge" comes from?
If you print 1 model at the same time it wil get to hot ta the top.
Print more then 1 model, 6 models at the same time, then the first 1 can cool down.
-or more cooling with fan at a higher setting.
I am printing these in a group of 6.. But you could be onto something as these top layers get really rapid and its very possible that heat builds up... I will try slowing the top layers down.
RE: Any idea where this "ridge" comes from?
Does the ridge correspond to an internal surface? It might be easiest if you zip and upload a 3MF project file with your part and settings to see what's going on.
No internal surfaces at all... I have attached teh 3mF file.
RE: Any idea where this "ridge" comes from?
Its not related to speed.. I printed a set of 9 today.. And near the top reduced the speed down to 25% (way OTT).. And the output is exactly the same.. The tip of the bullet looks nothing like the layer view..
RE: Any idea where this "ridge" comes from?
Have you tried to activate "Detect thin walls" - I see that the wall thickness of the bullet tip changes from layer to layer. As I remember it, this setting has to be activated to make variable wall width infill.
Have a look at my models on Printables.com 😉
RE: Any idea where this "ridge" comes from?
That step seems to be happening at the 189th layer/37.8mm mark where the slicer switches from perimeter to gap fill between the perimeters. You are printing very slowly, so speed is unlikely to be the issue. Two things that might help:
- Try adjusting Print Settings->Advanced and adjust perimeter widths to 0.4mm. This will make them a bit narrower and may help.
- Toggle Print Settings->Layers and perimeters->Quality->Ensure vertical shell thickness. This is normally a good thing as it will add infill, but it can result in a bit extra material that might show up on a curved surface like this.
You are starting to print some very thin walls. A smaller nozzle might be helpful.
RE: Any idea where this "ridge" comes from?
That step seems to be happening at the 189th layer/37.8mm mark where the slicer switches from perimeter to gap fill between the perimeters. You are printing very slowly, so speed is unlikely to be the issue. Two things that might help:
Interesting.. To be honest, its cosmetic, so its not worth chaning the nozzle.. But I will try the settings you recommend later.
Thanks
Jon