Minimum layer height for internal bridging
When printing with a larger nozzle, 0.5mm and up, and having a low (perimeter) layer height 0.1mm, the extruded material is so little that bridging fails completely and just deposits a small amount of fileamnt at the edge es of the hole.
Using combine infill doesn't use this setting for internal bridging, ie covering holes that have infill on top of them.
Or even with regular noncombining inill layers, a setting that the first bridge layer should have a certain minimal height, would help a lot.
That sounds right, use a thicker layer height.
Cheerio,
RE: Minimum layer height for internal bridging
That is not a solution, that is a workaround. And it would look terrible.
Tough.
If you want optimal performance from a low layer height you must use a smaller nozzle.
Cheerio,
RE: Minimum layer height for internal bridging
That is so true, some prints though, like spheres, that have low resolution in xy, but gets a boost by higher z-resolution. And I'd prefer to print those in halves with a square connector part. Great as a guide when you glue them halves together under pressure.
Now I could print a large sphere with a 0.2 nozzle, but god damn that would take time.
This was just an example, there are other objects that has similar properties.
Like many high precision parts the better answer is to print slighly oversize and machine to fit.
Now I could print a large sphere with a 0.2 nozzle, but god damn that would take time.
Bu not your time, machine time, if it matters you can add another printer.
Cheerio,
RE: Minimum layer height for internal bridging
Still not an answer, just workarounds. And adding another printer would half the time to print two objects, not one. But in the example I mentioned the equation is valid, since it comprised of two half-spheres.
And also, this would double the electricity cost and space needed. And since very few in the reprap community is working with this in a factory/workplace setting, space is at a premium (most likely a part of living space).
Still not an answer, just workarounds. And adding another printer would half the time to print two objects, not one.
Correct, it is a workaround - we are regrettably unable to use magic.
Cheerio,
RE: Minimum layer height for internal bridging
That's seriously too bad, but in all unseriousness, a slicer sometimes feel like magic.
RE:
Have you tried turning Thick Bridges on?
Unfortunately, you can only set that at a full print or as a setting for the full object. It doesn't show as a setting for a part or a mesh modifier.
See my (limited) designs on:
Printables - https://www.printables.com/@Sembazuru
Thingiverse - https://www.thingiverse.com/Sembazuru/designs
RE: Minimum layer height for internal bridging
Actually I have not, I didn't consider the possibility that first top layer infill was treated as a bridge. If it is, then also the bridge flow ratio might affect the output. Right now I'm using a much smaller tip so it hasn't been an issue for a while.
It's also possible that that setting wasn't available when I asked the question originally. (PrusaSlicer 2.2, I believe)
It's a case of ego-bias, "I am using a large tip at insane layer height so everyone does", hence I was confounded when the slicer hadn't an option for this.