What's causing this?
When printing the part shown in the photos it appeared as if the supporting material was being pressed down beginning at layer 150 of 211. When the print was complete unattached lines of extruded filament were all over. Also, the top of the part was supposed to be flat and smooth, but it was warped showing poor layer adhesion. Filament is Overture PETG, using factory recommended settings. The same part was previously printed using Hatchbox PLA with no problems.
Any help resolving this is greatly appreciated.
RE: What's causing this?
To get the best help, pls upload a zip-compressed 3mf file of your project. It will have all your settings for us to check. Needs to be compressed or forum software will silently ignore it.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: What's causing this?
Here is the .3mf file. Thank you for your assistance.
RE: What's causing this?
@rflournoy
Perhaps try something like this, when prompted if you want to enable bridging perimeters answer no.
RE: What's causing this?
Snuffle's solution is a good one. My first thought was also to flip the model so the large flat surface is on the bottom. Actually, my very first thought was to rotate it so it's printing the longest side in the Z direction. No supports needed at all, should print okay, with a brim, if you don't have a lot of vibration in your setup, and you don't expect much force in actual use along the layer lines.
In any case, I think you were using the default support settings, which are. Shall we say, suboptimal. See what Snuffle has done and learn from it. Close to what I would have done, probably would have left the pattern at rectilinear and just changed the pattern angle to 90 degrees so it wouldn't print those long, thin unstable lines.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: What's causing this?
Thank you for working on this for me. It's printing right now. 🙂
@rflournoy
Perhaps try something like this, when prompted if you want to enable bridging perimeters answer no.
RE: What's causing this?
Thank you for your help. I'm such a novice that I don't know where to look to learn how to do what Snuffle has done. I'm printing right now the way Snuffle sent it and when it's done I'll turn it on its end and do it again. 🙂
Snuffle's solution is a good one. My first thought was also to flip the model so the large flat surface is on the bottom. Actually, my very first thought was to rotate it so it's printing the longest side in the Z direction. No supports needed at all, should print okay, with a brim, if you don't have a lot of vibration in your setup, and you don't expect much force in actual use along the layer lines.
In any case, I think you were using the default support settings, which are. Shall we say, suboptimal. See what Snuffle has done and learn from it. Close to what I would have done, probably would have left the pattern at rectilinear and just changed the pattern angle to 90 degrees so it wouldn't print those long, thin unstable lines.
RE: What's causing this?
@fuchsr
I considered this as well,
rotate it so it's printing the longest side in the Z direction
The problem is that requires a very well tuned printer, and I couldn't be sure of that.
As for the support type, and the rotation along the Y axis, this was done because the OP's images denoted cooling issues, causing not only the model but the supports to curl sideways. This in turn removed support from a critical area, causing failure. By switching to honeycomb and rotating we even out the cooling, and just in case provide a support type that will resist curling in case the filament type or condition is inclined to do so. This was not a personal solution, but rather a broad solution, designed to overcome any short comings the OP's system may be experiencing. It also decreased the print time by almost 50% and offers better adhesion.
I'm just explaining, I'm not taking issue with anything you have said.
RE: What's causing this?
We're on the same page! Of course 😀
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...