Greetings everybody! I´m new to the Forum and hope to get some help with the following problems
I´m currently working on a project that requires to print some really large parts. I printed at 60 µm with the Hi-temp grey and PDMS vat. And after the Moai was nearly 25 hours into the print, it suddenly stopped printing the current file and instead started to print the next file on the SD card on top of it (see pictures). I really have no clue what happened here
The model was sliced with Asura 2.22
It was really a bummer to see this happening after almost 25 h of printing . I guess, I´ll just plane cut the model in Meshmixer where it left to print and print the rest, then glue the two parts together.
But aside from this I discovered some other issues as well. One of them being, that the outer walls of the print are not properly fused with the infill (visible on the cross section below, blue markings). This sometimes causes the outer surface of the print to delaminate, when ripped away by the peelforces (presumably), leaving those ugly holes (red arrow).
I´m not sure how to counteract this, as it seems to be a problem of using an FDM slicer instead of a dedicated SLA slicer. Another problem that is presumably caused by this circumstance, is that on some parts on the models I printed with the Moai the surface has a lot of tiny blobs. They are similar to blobbing on FDM printed parts, where the travel path of the nozzle enters or exits the object. And indeed, if I parse the gcodes in cura, those blob areas appear to be exactly where the travel paths hit the model. Those blobs are really tiny (wasn´t able to get a good picture), so it´s not that big of a deal. But it´s still kind of compromising the whole idea of having a high-res SLA printer, when you get surface imperfections like this introduced by the slicer.
Another thing is, that the color of the resin tends to bleach out pretty easily (also visible on the pictures). I only leave the prints exposed to the UV light for 10 to 20 min max. Is this still to long? I´m keeping the model submerged in tap water while curing.
Well, that´s it for now! I´m really hoping someone can help me with this. Here is my printer setup, just in case:
- Vat: PDMS
- Resin: HiTemp gray
- Slicer: Asura 2.22
- SD card: the one that came with the Moai. It was formatted about a week ago, due to another issue (caused the printer to perform an endless loop of tilt actions, instead of starting the print)
- level: A: 10.61, B: 10.69, C: 10.84, D: 10.85
Settings as recommended for PDMS, except:
PM Motor speed: 12
Laser Power: 52
Z Reset Position: 1877
Why the hell am I not allowed to upload more than one picture! How am I supposed to properly illustrate my issues with this nonsense restriction